1
|
Yamamoto S, Omi T, Akai H, Kubota Y, Takahashi Y, Suzuki Y, Hirata Y, Yamamoto K, Yukawa R, Horiba K, Yumoto H, Koyama T, Ohashi H, Owada S, Tono K, Yabashi M, Shigemasa E, Yamamoto S, Kotsugi M, Wadati H, Kumigashira H, Arima T, Shin S, Matsuda I. Element Selectivity in Second-Harmonic Generation of GaFeO_{3} by a Soft-X-Ray Free-Electron Laser. Phys Rev Lett 2018; 120:223902. [PMID: 29906133 DOI: 10.1103/physrevlett.120.223902] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Indexed: 05/27/2023]
Abstract
Nonlinear optical frequency conversion has been challenged to move down to the extreme ultraviolet and x-ray region. However, the extremely low signals have allowed researchers to only perform transmission experiments of the gas phase or ultrathin films. Here, we report second harmonic generation (SHG) of the reflected beam of a soft x-ray free-electron laser from a solid, which is enhanced by the resonant effect. The observation revealed that the double resonance condition can be met by absorption edges for transition metal oxides in the soft x-ray range, and this suggests that the resonant SHG technique can be applicable to a wide range of materials. We discuss the possibility of element-selective SHG spectroscopy measurements in the soft x-ray range.
Collapse
Affiliation(s)
- Sh Yamamoto
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T Omi
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa 277-8561, Japan
| | - H Akai
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Y Kubota
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Y Takahashi
- Tokyo University of Science, Katsushika 125-8585, Japan
| | - Y Suzuki
- Tokyo University of Science, Katsushika 125-8585, Japan
| | - Y Hirata
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - K Yamamoto
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - R Yukawa
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - K Horiba
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - H Yumoto
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - T Koyama
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - H Ohashi
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - S Owada
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - K Tono
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - M Yabashi
- RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - E Shigemasa
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (the Graduate University for Advanced Studies), Okazaki 444- 8585, Japan
| | - S Yamamoto
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - M Kotsugi
- Tokyo University of Science, Katsushika 125-8585, Japan
| | - H Wadati
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - H Kumigashira
- Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - T Arima
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa 277-8561, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - S Shin
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - I Matsuda
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| |
Collapse
|
2
|
Iwayama H, Léonard C, Le Quéré F, Carniato S, Guillemin R, Simon M, Piancastelli MN, Shigemasa E. Different Time Scales in the Dissociation Dynamics of Core-Excited CF_{4} by Two Internal Clocks. Phys Rev Lett 2017; 119:203203. [PMID: 29219361 DOI: 10.1103/physrevlett.119.203203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Indexed: 06/07/2023]
Abstract
Fragmentation processes following C 1s→lowest unoccupied molecular orbital core excitations in CF_{4} have been analyzed on the ground of the angular distribution of the CF_{3}^{+} emitted fragments by means of Auger electron-photoion coincidences. Different time scales have been enlightened, which correspond to either ultrafast fragmentation, on the few-femtosecond scale, where the molecule has no time to rotate and the fragments are emitted according to the maintained orientation of the core-excited species, or dissociation after resonant Auger decay, where the molecule still keeps some memory of the excitation process before reassuming random orientation. Potential energy surfaces of the ground, core-excited, and final states have been calculated at the ab initio level, which show the dissociative nature of the neutral excited state, leading to ultrafast dissociation, as well as the also dissociative nature of some of the final ionic states reached after resonant Auger decay, yielding the same fragments on a much longer time scale.
Collapse
Affiliation(s)
- H Iwayama
- UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - C Léonard
- Laboratoire Modélisation et Simulation Multi Echelle UMR 8208 CNRS, Université Paris-Est Marne-la-Vallée, F-77454 Marne-la-Vallée, France
| | - F Le Quéré
- Laboratoire Modélisation et Simulation Multi Echelle UMR 8208 CNRS, Université Paris-Est Marne-la-Vallée, F-77454 Marne-la-Vallée, France
| | - S Carniato
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - R Guillemin
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - M Simon
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - M N Piancastelli
- Sorbonne Universités, UPMC Univ Paris 6, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - E Shigemasa
- UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| |
Collapse
|
3
|
Iwayama H, Kaneyasu T, Hikosaka Y, Shigemasa E. Stability and dissociation dynamics of N2++ ions following core ionization studied by an Auger-electron–photoion coincidence method. J Chem Phys 2016; 145:034305. [DOI: 10.1063/1.4958620] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H. Iwayama
- UVSOR Facility, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
| | | | - Y. Hikosaka
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - E. Shigemasa
- UVSOR Facility, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
| |
Collapse
|
4
|
Gejo T, Ikegami T, Honma K, Takahashi O, Shigemasa E, Hikosaka Y, Tamenori Y. Dynamics of oxygen Rydberg atom generation following O 1sinner-shell excitation of H2O. J Chem Phys 2014; 140:214310. [DOI: 10.1063/1.4880557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
5
|
Hikosaka Y, Shibata Y, Soejima K, Iwayama H, Shigemasa E. Site-specific formation of metastable dications following inner-shell ionization of CO2. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.04.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Ohigashi T, Arai H, Araki T, Kondo N, Shigemasa E, Ito A, Kosugi N, Katoh M. Construction of the Scanning Transmission X-ray Microscope Beamline at UVSOR. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/463/1/012006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
7
|
Nakano M, Selles P, Lablanquie P, Hikosaka Y, Penent F, Shigemasa E, Ito K, Carniato S. Near-edge x-ray absorption fine structures revealed in core ionization photoelectron spectroscopy. Phys Rev Lett 2013; 111:123001. [PMID: 24093255 DOI: 10.1103/physrevlett.111.123001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 06/02/2023]
Abstract
Simultaneous core ionization and core excitation have been observed in the C(2)H(2n) (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K(-2)V) core excited states of the K(-1) molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
Collapse
Affiliation(s)
- M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Tokyo 152855, Japan and Institute of Material Structural Science, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Piancastelli MN, Guillemin R, Simon M, Iwayama H, Shigemasa E. Ultrafast dynamics in C 1s core-excited CF4 revealed by two-dimensional resonant Auger spectroscopy. J Chem Phys 2013; 138:234305. [PMID: 23802958 DOI: 10.1063/1.4810871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Following core excitation in an isolated molecule, ultrafast dissociation of one particular chemical bond can occur, where "ultrafast" is defined as taking place during the lifetime of the core hole, of the order of few femtoseconds. The signature of such phenomenon can be observed in resonant Auger spectra following core excitation. We present here an investigation of ultrafast dissociation following C 1s-to-σ* core excitation in CF4, with high-resolution resonant Auger spectroscopy. We are able to characterize final states of both the molecular ion and the CF3 (+) fragment. We use two-dimensional (2D) maps to record resonant Auger spectra across the resonance as a function of photon energy and to characterize ultrafast dynamics. This method provides immediate visual evidence of one of the important characteristics of the study of spectral features related to molecular versus fragment ionic final states, and namely their dispersion law. In the 2D maps we are also able to identify the dissociation limit for one of the molecular final states.
Collapse
Affiliation(s)
- M N Piancastelli
- Laboratoire de Chimie Physique-Matière et Rayonnement, UPMC, Université Paris 06, CNRS, UMR 7614, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France.
| | | | | | | | | |
Collapse
|
9
|
Nakano M, Penent F, Tashiro M, Grozdanov TP, Žitnik M, Carniato S, Selles P, Andric L, Lablanquie P, Palaudoux J, Shigemasa E, Iwayama H, Hikosaka Y, Soejima K, Suzuki IH, Kouchi N, Ito K. Single photon K(-2) and K(-1)K(-1) double core ionization in C(2)H(2n) (n=1-3), CO, and N(2) as a potential new tool for chemical analysis. Phys Rev Lett 2013; 110:163001. [PMID: 23679597 DOI: 10.1103/physrevlett.110.163001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Indexed: 06/02/2023]
Abstract
We have observed single photon double K-shell photoionization in the C(2)H(2n) (n=1-3) hydrocarbon sequence and in N(2) and CO, using synchrotron radiation and electron coincidence spectroscopy. Our previous observations of the K(-2) process in these molecules are extended by the observations of a single photon double photoionization with one core hole created at each of the two neighboring atoms in the molecule (K(-1)K(-1) process). In the C(2)H(2n) sequence, the spectroscopy of K(-1)K(-1) states is much more sensitive to the bond length than conventional electron spectroscopy for chemical analysis spectroscopy based on single K-shell ionization. The cross section variation for single photon K(-1)K(-1) double core ionization in the C(2)H(2n) sequence and in the isoelectronic C(2)H(2n), N(2) and CO molecules validates a knock-out mechanism in which a primary ionized 1s photoelectron ejects another 1s electron of the neighbor atom. The specific Auger decay from such states is clearly observed in the CO case.
Collapse
Affiliation(s)
- M Nakano
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Huttula SM, Lablanquie P, Andric L, Palaudoux J, Huttula M, Sheinerman S, Shigemasa E, Hikosaka Y, Ito K, Penent F. Decay of a 2p inner-shell hole in an Ar(+) ion. Phys Rev Lett 2013; 110:113002. [PMID: 25166528 DOI: 10.1103/physrevlett.110.113002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Indexed: 06/03/2023]
Abstract
Direct measurements of the photoelectrons or Auger electrons associated with inner shell ionization of positively charged ions are extremely difficult and rarely realized. We propose an alternative method to simulate such measurements, based on core valence double photoionization of the neutral species. As an example, we obtain the spectroscopy, lifetimes, and Auger decays of the states arising from 2p inner shell ionisation of an Ar(+) ion. Observations compare well with theoretical predictions obtained within multiconfigurational Dirac-Fock formalism.
Collapse
Affiliation(s)
- S-M Huttula
- Department of Physics, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
| | - P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - L Andric
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and Université Paris-Est, F77454 Marne La Vallee 2, France
| | - J Palaudoux
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - M Huttula
- Department of Physics, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
| | - S Sheinerman
- Department of Physics, St. Petersburg State Maritime Technical University, 198262 St. Petersburg, Russia
| | - E Shigemasa
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - K Ito
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
| | - F Penent
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| |
Collapse
|
11
|
Iwayama H, Sisourat N, Lablanquie P, Penent F, Palaudoux J, Andric L, Eland JHD, Bučar K, Žitnik M, Velkov Y, Hikosaka Y, Nakano M, Shigemasa E. A local chemical environment effect in site-specific Auger spectra of ethyl trifluoroacetate. J Chem Phys 2013; 138:024306. [DOI: 10.1063/1.4773294] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
12
|
Fushitani M, Hikosaka Y, Matsuda A, Liu CN, Morishita T, Shigemasa E, Hishikawa A. Ultrafast Nonlinear Double Excitations of He in Intense EUV FEL Fields. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134102009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Hishikawa A, Fushitani M, Hikosaka Y, Matsuda A, Liu CN, Morishita T, Shigemasa E, Nagasono M, Tono K, Togashi T, Ohashi H, Kimura H, Senba Y, Yabashi M, Ishikawa T. Enhanced nonlinear double excitation of He in intense extreme ultraviolet laser fields. Phys Rev Lett 2011; 107:243003. [PMID: 22242995 DOI: 10.1103/physrevlett.107.243003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Indexed: 05/31/2023]
Abstract
Nonlinear, three-photon double excitation of He in intense extreme ultraviolet free-electron laser fields (∼24.1 eV, ∼5 TW/cm2) is presented. Resonances to the doubly excited states converging to the He+ N=3 level are revealed by the shot-by-shot photoelectron spectroscopy and identified by theoretical calculations based on the time-dependent Schrödinger equation for the two-electron atom under a laser field. It is shown that the three-photon double excitation is enhanced by intermediate Rydberg states below the first ionization threshold, giving a greater contribution to the photoionization yields than the two-photon process by more than 1 order of magnitude.
Collapse
Affiliation(s)
- A Hishikawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Lablanquie P, Grozdanov TP, Zitnik M, Carniato S, Selles P, Andric L, Palaudoux J, Penent F, Iwayama H, Shigemasa E, Hikosaka Y, Soejima K, Nakano M, Suzuki IH, Ito K. Evidence of single-photon two-site core double ionization of C2H2 molecules. Phys Rev Lett 2011; 107:193004. [PMID: 22181603 DOI: 10.1103/physrevlett.107.193004] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 05/31/2023]
Abstract
We observe the formation in a single-photon transition of two core holes, each at a different carbon atom of the C2H2 molecule. At a photon energy of 770.5 eV, the probability of this 2-site core double ionization amounts to 1.6 ± 0.4% of the 1-site core double ionization. A simple theoretical model based on the knockout mechanism gives reasonable agreement with experiment. Spectroscopy and Auger decays of the associated double core hole states are also investigated.
Collapse
Affiliation(s)
- P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Hikosaka Y, Lablanquie P, Penent F, Palaudoux J, Andric L, Soejima K, Shigemasa E, Suzuki IH, Nakano M, Ito K. Energy correlation among three photoelectrons emitted in core-valence-valence triple photoionization of Ne. Phys Rev Lett 2011; 107:113005. [PMID: 22026663 DOI: 10.1103/physrevlett.107.113005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Indexed: 05/31/2023]
Abstract
The direct observation of triple photoionization involving one inner shell and two valence electrons is reported. The energy distribution of the three photoelectrons emitted from Ne is obtained using a very efficient multielectron coincidence method using the magnetic bottle electron spectroscopic technique. A predominance of the direct path to triple photoionization for the formation of Ne3+ in the 1s 2s2 2p4 configuration is observed. It is demonstrated that the energy distribution evolves with photon energy and indicates a significant difference with triple photoionization involving only valence electrons.
Collapse
Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Lablanquie P, Penent F, Palaudoux J, Andric L, Selles P, Carniato S, Bučar K, Zitnik M, Huttula M, Eland JHD, Shigemasa E, Soejima K, Hikosaka Y, Suzuki IH, Nakano M, Ito K. Properties of hollow molecules probed by single-photon double ionization. Phys Rev Lett 2011; 106:063003. [PMID: 21405466 DOI: 10.1103/physrevlett.106.063003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Indexed: 05/30/2023]
Abstract
The formation of hollow molecules (with a completely empty K shell in one constituent atom) through single-photon core double ionization has been demonstrated using a sensitive magnetic bottle experimental technique combined with synchrotron radiation. Detailed properties are presented such as the spectroscopy, formation, and decay dynamics of the N(2)(2+) K(-2) main and satellite states and the strong chemical shifts of double K holes on an oxygen atom in CO, CO2, and O2 molecules.
Collapse
Affiliation(s)
- P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Hikosaka Y, Kaneyasu T, Matsushita T, Tamenori Y, Shigemasa E. Dissociation of core-valence doubly excited states in NO followed by atomic Auger decay. J Chem Phys 2010; 133:154315. [PMID: 20969394 DOI: 10.1063/1.3505297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The decay processes of core-valence doubly excited states near the N K edge of NO have been studied using electron spectroscopy. Electron yields measured as a function of photon energy and kinetic energy enable the clear identification of atomic Auger lines associated with the dissociation of doubly excited states. The atomic Auger lines exhibit Doppler profiles, allowing the entire reaction scheme of such dissociation processes to be determined.
Collapse
Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
| | | | | | | | | |
Collapse
|
18
|
Hikosaka Y, Fushitani M, Matsuda A, Tseng CM, Hishikawa A, Shigemasa E, Nagasono M, Tono K, Togashi T, Ohashi H, Kimura H, Senba Y, Yabashi M, Ishikawa T. Multiphoton double ionization of Ar in intense extreme ultraviolet laser fields studied by shot-by-shot photoelectron spectroscopy. Phys Rev Lett 2010; 105:133001. [PMID: 21230767 DOI: 10.1103/physrevlett.105.133001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Indexed: 05/30/2023]
Abstract
Photoelectron spectroscopy has been performed to study the multiphoton double ionization of Ar in an intense extreme ultraviolet laser field (hν ∼ 21 eV, ∼ 5 TW/cm²), by using a free electron laser (FEL). Three distinct peaks identified in the observed photoelectron spectra clearly show that the double ionization proceeds sequentially via the formation of Ar(+): Ar+hν→Ar (+) + e⁻ and Ar²(+) + 2hν→Ar(+) + e⁻. Shot-by-shot recording of the photoelectron spectra allows simultaneous monitoring of FEL spectrum and the multiphoton process for each FEL pulse, revealing that the two-photon ionization from Ar(+) is significantly enhanced by intermediate resonances in Ar(+).
Collapse
Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Hikosaka Y, Lablanquie P, Penent F, Kaneyasu T, Shigemasa E, Feifel R, Eland JHD, Ito K. Energy correlation of the three electrons emitted during the triple photoionization of Ar. Phys Rev Lett 2009; 102:013002. [PMID: 19257186 DOI: 10.1103/physrevlett.102.013002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Indexed: 05/27/2023]
Abstract
We report on an experimental investigation of energy correlation among three electrons emitted in valence triple photoionization (TPI) of Ar. The energy correlations reveal a predominant contribution from sequential TPI processes involving intermediate Ar2+ formation, which suggests that such indirect contributions should be included in the formulation of the threshold law for TPI cross sections. The differential cross section for direct TPI at about 150 eV above threshold producing one slow electron with a few eV kinetic energy is found to have a deeply hollow U-shaped profile in energy sharing between the other two electrons.
Collapse
Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Kaneyasu T, Hikosaka Y, Lablanquie P, Penent F, Andric L, Gamblin G, Eland JHD, Tamenori Y, Matsushita T, Shigemasa E. Mechanisms of spontaneous two-electron emission from core-excited states of molecular CO. Phys Rev Lett 2008; 101:183003. [PMID: 18999827 DOI: 10.1103/physrevlett.101.183003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2008] [Indexed: 05/27/2023]
Abstract
We demonstrate that the observation of slow electrons emitted in the decay of molecular core-excited states can be a sensitive probe of the double Auger processes, and that in combination with electron-electron coincidence spectroscopy, it can provide clear insight into the mechanisms involved. The present study identifies all cascade Auger paths from the C1s-to-Rydberg states in CO to final states of CO2+. One pathway includes the first directly identified case of molecular level-to-level autoionization of a cation and shows remarkable selectivity for a specific final state.
Collapse
Affiliation(s)
- T Kaneyasu
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Hikosaka Y, Velkov Y, Shigemasa E, Kaneyasu T, Tamenori Y, Liu J, Gel'mukhanov F. X-ray absorption measured in the resonant Auger scattering mode. Phys Rev Lett 2008; 101:073001. [PMID: 18764527 DOI: 10.1103/physrevlett.101.073001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Indexed: 05/26/2023]
Abstract
We report both experimental and theoretical studies on x-ray absorption measured in the resonant Auger scattering mode of gas phase carbon monoxide near the O1s-->2pi region. Both experiment and theory display a crucial difference between the x-ray absorption profiles obtained in the conventional and resonant scattering modes. Lifetime vibrational interference is the main source of the difference. It is demonstrated that such interference, which arises from a coherent excitation to overlapping intermediate levels, ruins the idea for obtaining x-ray absorption spectra in a lifetime broadening free regime.
Collapse
Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | | | |
Collapse
|
22
|
Hikosaka Y, Kaneyasu T, Shigemasa E, Lablanquie P, Penent F, Ito K. Multielectron coincidence spectroscopy for core-valence doubly ionized states of CO. J Chem Phys 2007; 127:044305. [PMID: 17672688 DOI: 10.1063/1.2750341] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Double photoionization into states which have holes in one core and one valence orbitals has been observed in CO using a state-of-the-art multielectron coincidence method. The core-valence CO2+ structures exhibited on the electron coincidence spectra are assigned by comparison with the available calculation [H. Schulte et al., J. Chem. Phys. 105, 11108 (1996)]. Features of the spectrum confirm that the properties of the CO2+ states are characterized by the interaction between the localized valence holes and the core holes.
Collapse
Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | |
Collapse
|
23
|
Céolin D, Miron C, Le Guen K, Guillemin R, Morin P, Shigemasa E, Millié P, Ahmad M, Lablanquie P, Penent F, Simon M. Photofragmentation study of hexamethyldisiloxane following core ionization and direct double ionization. J Chem Phys 2007; 123:234303. [PMID: 16392916 DOI: 10.1063/1.2136152] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
X-ray photoelectron spectroscopy and Auger spectroscopy studies of gas-phase hexamethyldisiloxane (HMDSO) are presented. The photodissociation of this molecule is studied using various experimental coincidence techniques. We compare the fragmentation pathways observed after core ionization followed by Auger decay and after valence double photoionization of the molecule. A strongly selective production of the doubly charged tetramethyldisiloxane ion is observed in the low binding-energy regions. Theoretical calculations are carried out to tentatively explain the stability of the produced dication.
Collapse
Affiliation(s)
- D Céolin
- Department of Physics, Uppsala University, P.O. Box 530, SE-75121 Uppsala, Sweden
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Hikosaka Y, Lablanquie P, Penent F, Kaneyasu T, Shigemasa E, Eland JHD, Aoto T, Ito K. Double photoionization into double core-hole states in Xe. Phys Rev Lett 2007; 98:183002. [PMID: 17501570 DOI: 10.1103/physrevlett.98.183002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Indexed: 05/15/2023]
Abstract
Double photoionization (DPI) leading to double core-hole states of Xe2+ 4d(-2) has been studied using a magnetic bottle time-of-flight spectrometer. The assignments of the Xe2+ 4d(-2) states are confirmed by the Auger lines extracted from fourfold coincidences including two photoelectrons and two Auger electrons. It is estimated that the core-core DPI into Xe2+ 4d(-2) at a photon energy of 301.6 eV has a favored cross section of about 0.3 MB. The intense core-core DPI is due to mixing of the 4d(-2) continuum with the 4p single photoionization, which is manifested in the relative intensities of the Xe2+ 4d(-2) components.
Collapse
Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Aoto T, Ito K, Hikosaka Y, Shigemasa E, Penent F, Lablanquie P. Properties of resonant interatomic Coulombic decay in Ne dimers. Phys Rev Lett 2006; 97:243401. [PMID: 17280282 DOI: 10.1103/physrevlett.97.243401] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Indexed: 05/13/2023]
Abstract
Properties of the interatomic Coulombic decay (ICD) process in Ne dimers have been obtained by tracking the formation of energetic Ne+ ions. The double photoionization cross section, deduced from the Ne+/Ne+ coincidence signal, is dominated by the ICD process and presents a threshold 280 meV below the atomic Ne+2s(-1) threshold. Rydberg excitation of a 2s electron in the dimer creates molecular Rydberg states whose Sigma and Pi symmetries have been resolved. These excited states decay by a resonant ICD process releasing an energetic Ne+ ion and a neutral excited Ne* fragment. Subsequent autoionization of the Ne* fragment explains a double photoionization threshold below the dimer 2s ionization threshold.
Collapse
Affiliation(s)
- T Aoto
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
| | | | | | | | | | | |
Collapse
|
26
|
Hikosaka Y, Aoto T, Lablanquie P, Penent F, Shigemasa E, Ito K. Experimental investigation of core-valence double photoionization. Phys Rev Lett 2006; 97:053003. [PMID: 17026099 DOI: 10.1103/physrevlett.97.053003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Indexed: 05/12/2023]
Abstract
Core-valence double photoionization has been observed in Ne atoms and N2 molecules using a magnetic-bottle time of flight spectrometer. The multielectron coincidence data sets give complete information on the energy correlations between all emitted electrons, which supports a detailed description of the core-valence double photoionization processes including direct spectroscopy of the core-valence doubly ionized states, the final states populated by their Auger decay and details of the dynamics of core-valence double photoionization for selected states.
Collapse
Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | | | | | | | | | | |
Collapse
|
27
|
Guillemin R, Hemmers O, Lindle DW, Shigemasa E, Le Guen K, Ceolin D, Miron C, Leclercq N, Morin P, Simon M, Langhoff PW. Nondipolar electron angular distributions from fixed-in-space molecules. Phys Rev Lett 2002; 89:033002. [PMID: 12144388 DOI: 10.1103/physrevlett.89.033002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2002] [Indexed: 05/23/2023]
Abstract
The first indication of nondipole effects in the azimuthal dependence of photoelectron angular distributions emitted from fixed-in-space molecules is demonstrated in N (2). Comparison of the results with angular distributions observed for randomly oriented molecules and theoretical derivations for the nondipole correction first order in photon momentum suggests that higher orders will be needed to describe distributions measured in the molecular frame.
Collapse
Affiliation(s)
- R Guillemin
- Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Guillemin R, Shigemasa E, Le Guen K, Ceolin D, Miron C, Leclercq N, Morin P, Simon M. Dynamical angular correlation in molecular Auger decay. Phys Rev Lett 2001; 87:203001. [PMID: 11690472 DOI: 10.1103/physrevlett.87.203001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2001] [Indexed: 05/23/2023]
Abstract
The first measurements of the angular distribution of Auger electrons from fixed-in-space molecules have been performed in the C K-shell ionization region of CO, for both parallel and perpendicular orientations of the molecular axis with respect to the light polarization vector. The angular distributions obtained for the CO(2+)B(1)Sigma Auger final state show dramatic spectral variations, which also depend on the initial ionization channels, Sigma or Pi, and on the ionization photon energy. This dynamical angular correlation process strongly suggests the breakdown of a two-step model in which the Auger decay is treated independently of the initial photoionization process.
Collapse
Affiliation(s)
- R Guillemin
- LURE, Université Paris-Sud, 91898 ORSAY Cedex, France.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Takata Y, Shigemasa E, Kosugi N. Mg and Al K-edge XAFS measurements with a KTP crystal monochromator. J Synchrotron Radiat 2001; 8:351-353. [PMID: 11512777 DOI: 10.1107/s0909049500015995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2000] [Accepted: 10/30/2000] [Indexed: 05/23/2023]
Abstract
There has been a strong demand for monochromator crystals with a large lattice spacing in order to measure EXAFS spectra at the Mg and Al K-edges. We have introduced a pair of KTP crystal at BL1A of the UVSOR facility and examined its performance in the energy range between 1200 and 2000eV. This crystal monochromator can supply stable photon beams enough to measure the EXAFS spectra for the Mg and Al K-edges. Advantages of the KTP crystal are discussed in comparison with a YB66 crystal monochromator.
Collapse
Affiliation(s)
- Y Takata
- Institute of Molecular Science, Myodaiji, Okazaki, Japan.
| | | | | |
Collapse
|
30
|
Yan Y, Shigemasa E, Yagishita A. Application of a Varied-Line-Spacing Grating in a High-Performance Soft X-ray Monochromator. J Synchrotron Radiat 1998; 5:246-251. [PMID: 15263486 DOI: 10.1107/s0909049597017263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/18/1997] [Indexed: 05/24/2023]
Abstract
The design and experimental evaluation of a high-resolution varied-line-spacing-grating monochromator constructed at the Photon Factory are described. Various applications of a varied-line-spacing grating in a high-performance soft X-ray monochromator are discussed.
Collapse
Affiliation(s)
- Y Yan
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, People's Republic of China
| | | | | |
Collapse
|
31
|
Kiyokura T, Maeda F, Watanabe Y, Shigemasa E, Yagishita A, Oshima M, Iketaki Y, Horikawa Y. Submicrometre-area high-energy-resolution photoelectron spectroscopy system. J Synchrotron Radiat 1998; 5:1111-1113. [PMID: 15263762 DOI: 10.1107/s090904959701426x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 10/21/1997] [Indexed: 05/24/2023]
Abstract
A submicrometre-area photoelectron spectroscopy system that uses a multi-layer-coated Schwarzschild objective as the soft X-ray microbeam optics has been developed. The system is located at an undulator beamline (BL-16U) at the Photon Factory in the High Energy Accelerator Research Organization. By knife-edge measurement, the microbeam size was estimated to be 160 nm at the sample position using a 25-75% criterion. Photoelectron spectral measurements revealed that the Fermi edge width was 0.12 eV, which means that the instrumental resolution was 0.05 eV, after removing the natural broadening of the Fermi edge at room temperature. This system offers both high energy resolution and high spatial resolution.
Collapse
Affiliation(s)
- T Kiyokura
- NTT Basic Research Laboratories, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-01, Japan
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Shigemasa E, Toyoshima A, Yan Y, Hayaishi T, Soejima K, Kiyokura T, Yagishita A. High-resolution spherical grating monochromator for the undulator beamline (BL-16B) at the Photon Factory. J Synchrotron Radiat 1998; 5:777-779. [PMID: 15263650 DOI: 10.1107/s0909049597019791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 12/17/1997] [Indexed: 05/24/2023]
Abstract
The design and performance of a 24 m high-resolution spherical grating monochromator (H-SGM) for the undulator beamline (BL-16B) at the Photon Factory are described. With three interchangeable gratings of 400, 900 and 2000 lines mm(-1), the H-SGM is designed to cover the photon energy range 40-600 eV. With a resolving power of approximately 2000 in the photon energy range 40-530 eV, more than 10(11) photons s(-1) have been measured. The best resolutions obtained so far, at a substantially lower photon flux, are greater than 10 000 at 250 eV and 8000 at 400 eV
Collapse
Affiliation(s)
- E Shigemasa
- Photon Factory, IMSS, Oho 1-1, Tsukuba, Ibaraki 305, Japan
| | | | | | | | | | | | | |
Collapse
|
33
|
Hayaishi T, Murakami E, Lu Y, Shigemasa E, Yagishita A, Koike F, Morioka Y. Postcollision interaction effects induced by Auger cascades following Xe L3-shell ionization. Phys Rev A 1996; 54:4064-4068. [PMID: 9913953 DOI: 10.1103/physreva.54.4064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
34
|
Kosugi N, Ueda K, Shimizu Y, Chiba H, Okunishi M, Ohmori K, Sato Y, Shigemasa E. Rydberg and valence states in the C 1s photoabsorption and resonance Auger spectra of CH3F. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)01121-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
35
|
Ueda K, Ohmori K, Okunishi M, Chiba H, Shimizu Y, Sato Y, Hayaishi T, Shigemasa E, Yagishita A. Direct observation of correlation between electron emission and fragmentation into ions following B 1s excitation of the BF3 molecule. Phys Rev A 1995; 52:R1815-R1818. [PMID: 9912526 DOI: 10.1103/physreva.52.r1815] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
36
|
Azuma Y, Hasegawa S, Koike F, Kutluk G, Nagata T, Shigemasa E, Yagishita A, Sellin IA. New photon-induced triply excited hollow atom states of lithium. Phys Rev Lett 1995; 74:3768-3771. [PMID: 10058292 DOI: 10.1103/physrevlett.74.3768] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
37
|
Ueda K, Okunishi M, Chiba H, Shimizu Y, Ohmori K, Sato Y, Shigemasa E, Kosugi N. Rydberg—valence mixing in the C 1s excited states of CH4 probed by electron spectroscopy. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00227-u] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Shigemasa E, Adachi J, Oura M, Yagishita A. Angular distributions of 1s sigma photoelectrons from fixed-in-spaceN2 molecules. Phys Rev Lett 1995; 74:359-362. [PMID: 10058738 DOI: 10.1103/physrevlett.74.359] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
39
|
Ueda K, Chiba H, Sato Y, Hayaishi T, Shigemasa E, Yagishita A. B KVV and Cl LVV normal and resonance Auger electron spectra in gaseous BCl3 molecules. J Chem Phys 1994. [DOI: 10.1063/1.468289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
40
|
Ueda K, Chiba H, Sato Y, Hayaishi T, Shigemasa E, Yagishita A. Electronic decay processes following the resonance excitation of the B 1s core electron in BF3. J Chem Phys 1994. [DOI: 10.1063/1.467537] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
41
|
Yagishita A, Shigemasa E, Kosugi N. Observation of Rydberg-valence mixing in high-resolution symmetry-resolved oxygen K-edge spectra of O2. Phys Rev Lett 1994; 72:3961-3964. [PMID: 10056344 DOI: 10.1103/physrevlett.72.3961] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
42
|
Shigemasa E, Hayaishi T, Sasaki T, Yagishita A. Symmetry-resolved C and O K-shell photoabsorption spectra of free CO molecules. Phys Rev A 1993; 47:1824-1829. [PMID: 9909135 DOI: 10.1103/physreva.47.1824] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
43
|
Ueda K, Chiba H, Sato Y, Hayaishi T, Shigemasa E, Yagishita A. Resonance-Auger-electron-photoion coincidence studies on state-to-state dissociation dynamics of inner-shell-excited BF3. Phys Rev A 1992; 46:R5-R8. [PMID: 9907921 DOI: 10.1103/physreva.46.r5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
44
|
Tulkki J, Aksela S, Aksela H, Shigemasa E, Yagishita A, Furusawa Y. Krypton 4p, 4s, and 3d partial photoionization cross sections below a photon energy of 260 eV. Phys Rev A 1992; 45:4640-4645. [PMID: 9907543 DOI: 10.1103/physreva.45.4640] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
45
|
Shigemasa E, Ueda K, Sato Y, Sasaki T, Yagishita A. Symmetry-resolved K-shell photoabsorption spectra of free N2 molecules. Phys Rev A 1992; 45:2915-2921. [PMID: 9907323 DOI: 10.1103/physreva.45.2915] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
46
|
Hayaishi T, Murakami E, Morioka Y, Aksela H, Aksela S, Shigemasa E, Yagishita A. Manifestation of Kr 3d and Xe 4d conjugate shake-up satellites in threshold-electron spectra. Phys Rev A 1991; 44:R2771-R2774. [PMID: 9906356 DOI: 10.1103/physreva.44.r2771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
47
|
Yagishita A, Maezawa H, Ukai M, Shigemasa E. Angular distributions of molecular photofragments emitted following K-shell excitation of N2. Phys Rev Lett 1989; 62:36-39. [PMID: 10039542 DOI: 10.1103/physrevlett.62.36] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|