1
|
Sixt T, Chung T, Stienkemeier F, Dulitz K. Symmetry Dependence of the Continuum Coupling in the Chemi-ionization of Li(2 2S 1/2) by He(2 3S 1, 2 3P J). J Phys Chem A 2023; 127:4407-4414. [PMID: 37184430 DOI: 10.1021/acs.jpca.3c00431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In the literature, the chemi-ionization of Li in the 22S1/2 ground level by He in a metastable state is typically described as an electron transfer process in which an electron from the 2s orbital of Li is transferred to the 1s orbital of He while an electron from the 2s orbital of He is ejected. Therefore, one would not assume that the orbital of the valence electron of He strongly influences the coupling strength of the collision complex to the ionization continuum. However, we observe that the chemi-ionization rate is decreased when He is laser-excited from the metastable 23S1 level to the 23PJ level (with J = 0, 1, 2). A semiclassical treatment of the reaction dynamics reveals a strong dependence of the ionization rate on the reaction-channel-specific ionization width functions to which the observed decrease of the rate coefficients can be related to. The results are relevant for the improved understanding and control of chemi-ionization processes in merged beams and in traps.
Collapse
Affiliation(s)
- Tobias Sixt
- Institute of Physics, University of Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
| | - Taewon Chung
- Institute of Physics, University of Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
| | - Frank Stienkemeier
- Institute of Physics, University of Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
| | - Katrin Dulitz
- Institute of Physics, University of Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, 6020 Innsbruck, Austria
| |
Collapse
|
2
|
Dengel H, Merz A, Müller M, Gérard K, Ruf MW, Hotop H. Electron-ion coincidence study of ionizing thermal energy collisions between He*(21S) and Ar atoms. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
3
|
Zou J, Gordon SDS, Tanteri S, Osterwalder A. Stereodynamics of Ne( 3P 2) reacting with Ar, Kr, Xe, and N 2. J Chem Phys 2018; 148:164310. [PMID: 29716200 DOI: 10.1063/1.5026952] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Stereodynamics experiments of Ne(3P2) reacting with Ar, Kr, Xe, and N2 leading to Penning and associative ionization have been performed in a crossed molecular beam apparatus. A curved magnetic hexapole was used to state-select and polarize Ne(3P2) atoms which were then oriented in a rotatable magnetic field and crossed with a beam of Ar, Kr, Xe, or N2. The ratio of associative to Penning ionization was recorded as a function of the magnetic field direction for collision energies between 320 cm-1 and 500 cm-1. Reactivities are obtained for individual states that differ only in Ω, the projection of the neon total angular momentum vector on the inter-particle axis. The results are rationalized on the basis of a model involving a long-range and a short-range reaction mechanism. Substantially lower probability for associative ionization was observed for N2, suggesting that predissociation plays a critical role in the overall reaction pathway.
Collapse
Affiliation(s)
- Junwen Zou
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Sean D S Gordon
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Silvia Tanteri
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Andreas Osterwalder
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| |
Collapse
|
4
|
Symmetry and Angular Momentum in Collisions with Laser-Excited Polarized Atoms. ADVANCES IN CHEMICAL PHYSICS 2007. [DOI: 10.1002/9780470141212.ch2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
|
5
|
Arango CA, Shapiro M, Brumer P. Coherent control of collision processes: Penning versus associative ionization. J Chem Phys 2006; 125:094315. [PMID: 16965088 DOI: 10.1063/1.2336430] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Coherent control theory is applied to the control of Ne*(3s,(3)P2)+Ar((1)S0) collisions and computations are shown that display extensive control over these processes. Indeed we demonstrate that it is possible to essentially turn on and off the cross sections for both the Penning and associative ionization processes. This facility arises from the interference between matter waves induced by creating a linear superposition of the degenerate M={-2,-1,0,1,2} Zeeman sublevels of the Ne*(3s,(3)P2) target atom. The computations, conducted at collision energies in the 1-8 kcal/mole range, are based on combining, within the "rotating atom approximation," empirically derived and ab initio ionization widths.
Collapse
Affiliation(s)
- Carlos A Arango
- Chemical Physics Theory Group, Department of Chemistry, University of Toronto, Toronto M5S3H6, Canada
| | | | | |
Collapse
|
6
|
Vredenbregt E, Rooyakkers W, van Gerwen R, van de Hurk P, Beijerinck H. Fine-structure dependence of the Ar∗ (3P0,2) + N2(X) excitation transfer process. Chem Phys 1997. [DOI: 10.1016/s0301-0104(97)00006-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
7
|
Aardema T, van Asten N, Driessen J, Vredenbregt E, Beijerinck H. Excitation transfer in collisions of Kr{4p55p; 3D3} with N2 molecules. Chem Phys 1996. [DOI: 10.1016/0301-0104(95)00405-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
8
|
Shore BW, Martin J, Fewell MP, Bergmann K. Coherent population transfer in multilevel systems with magnetic sublevels. I. Numerical studies. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:566-582. [PMID: 9912281 DOI: 10.1103/physreva.52.566] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
9
|
Boom W, Klaver BJ, Heier JT, Beijerinck HC, Verhaar BJ. Intramultiplet mixing in the electron-volt energy range for Ne**{(2p)5(3p)}+He. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 51:3837-3851. [PMID: 9912055 DOI: 10.1103/physreva.51.3837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
10
|
Boom W, Huijsmans FJ, Beijerinck HC, Verhaar BJ. Energy-resolved intramultiplet mixing in the electron-volt range for Ne**{(2p)5(3p)}+He. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1994; 49:4660-4675. [PMID: 9910786 DOI: 10.1103/physreva.49.4660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
|
11
|
Driessen JPJ, Eno L. Three‐vector correlation theory for orientation/alignment studies in atomic and molecular collisions. J Chem Phys 1992. [DOI: 10.1063/1.463786] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
12
|
Smith CJ, Driessen JPJ, Eno L, Leone SR. Laser preparation and probing of initial and final orbital alignment in collision‐induced energy transfer Ca(4s5p, 1P1) +He→Ca(4s5p, 3P2)+He. J Chem Phys 1992. [DOI: 10.1063/1.462326] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Driessen J, Manders M, van de Weijer F, Sandker G, Boom W, Beijerinck H, Verhaar B. Total ionization cross sections for Ne**{(2p)5(3p); J = 3}-molecule systems: Absolute values and polarization effects. Chem Phys 1991. [DOI: 10.1016/0301-0104(91)80120-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
14
|
Khan A, Siddiqui HR, Siska PE. Angle‐energy distributions of Penning ions in crossed molecular beams. II. Effect of Penning electron recoil in Ne*(3s 3P2)+H,D→Ne+H+,D++e−. J Chem Phys 1991. [DOI: 10.1063/1.460842] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
15
|
Driessen JP, Smith CJ, Leone SR. Alignment effects of ||J=3> states prepared by three-photon excitation: Sixfold symmetry in collisional energy transfer, Ca(4s4f,1F3)+He-->Ca(4p2,1S0)+He. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:R1431-R1434. [PMID: 9906199 DOI: 10.1103/physreva.44.r1431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
16
|
Driessen JP, Somers LM, Beijerinck HC, Verhaar BJ. Autoionization widths for Ne*(3s)-Ar and Ne**(3p)-Ar collisions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 44:167-185. [PMID: 9905667 DOI: 10.1103/physreva.44.167] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
17
|
Schohl S, Klar D, Kraft T, Meijer HAJ, Ruf MW, Schmitz U, Smith SJ, Hotop H. Absolute detection of metastable rare gas atoms by a cw laser photoionization method. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01426615] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
18
|
Rubahn HG, Konz E, Schiemann S, Bergmann K. Alignment of electronic angular momentum by stimulated raman scattering with delayed pulses. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01438564] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
19
|
Pure state Ne*(*)[|J, M⪢]-preparation in a magnetic field: Polarization effects in ionizing collisions. Chem Phys 1990. [DOI: 10.1016/0301-0104(90)85059-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
20
|
Driessen JP, Zonneveld MJ, Somers LM, Janssens MF, Beijerinck HC, Verhaar BJ. Polarization effects in the ionization cross section of Ar, Kr, and Xe by laser-excited Ne**. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1990; 42:4058-4076. [PMID: 9904508 DOI: 10.1103/physreva.42.4058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
21
|
Robinson RL, Kovalenko LJ, Smith CJ, Leone SR. Individual cross sections for1D2sublevels (ML=0, ±1, ±2) in the alignment‐dependent process: Ca(4p21D2)+Rg→Ca(3d4p1F3)+Rg as a function of rare gas. J Chem Phys 1990. [DOI: 10.1063/1.458532] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
22
|
Manders MP, Vredenbregt EJ, Sandker GJ, Beijerinck HC, Verhaar BJ. Semiclassical analysis of polarization effects in collision-induced intramultiplet mixing for Ne. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 39:4467-4486. [PMID: 9901796 DOI: 10.1103/physreva.39.4467] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
23
|
Bregel T, Yencha AJ, Ruf MW, Waibel H, Hotop H. Detailed electron spectrometric study of the ionization of H2 by He* (21 S, 23 S). ACTA ACUST UNITED AC 1989. [DOI: 10.1007/bf01437343] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
24
|
Kraft T, Bregel T, Ganz J, Harth K, Ruf MW, Hotop H. Accurate comparison of Hel, NeI photoionization and He(23, 1 S), Ne(3s 3 P s,3 P 0) penning ionization of argon atoms and dimers. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf01425766] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
25
|
Manders MPI, Ruyten WM, Beucken FVD, Driessen JPJ, Veugelers WJT, Kramer PH, Vredenbregt EJD, van Hoek WBM, Sandker GJ, Beijerinck HCW, Verhaar BJ. A crossed‐beam experiment on intramultiplet mixing collisions with short‐lived Ne** {(2p)5(3p)} atoms. J Chem Phys 1988. [DOI: 10.1063/1.455672] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
26
|
Manders MP, Driessen JP, Beijerinck HC, Verhaar BJ. Collision-induced intramultiplet mixing for Ne. PHYSICAL REVIEW. A, GENERAL PHYSICS 1988; 37:3237-3253. [PMID: 9900067 DOI: 10.1103/physreva.37.3237] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
27
|
Long-range intermolecular potentials for the metastable rare gas-rare gas systems Ar*, Kr*(3P0,2)+Ar, Kr, Xe. Chem Phys 1988. [DOI: 10.1016/0301-0104(88)90029-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
28
|
Bussert W, Neuschäfer D, Leone SR. The effect of orbital alignment on the forward and reverse electronic energy transfer Ca(4s5p 1P1)+M⇄Ca(4s5p 3PJ)+M with rare gases. J Chem Phys 1987. [DOI: 10.1063/1.452938] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
29
|
Bussert W, Leone SR. Orbital alignment effects in the Ca(4s5p1P1)to Ca(4s5p3Pj) electronic energy transfer with molecular collision partners. Chem Phys Lett 1987. [DOI: 10.1016/0009-2614(87)80379-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
30
|
|
31
|
Manders MP, Driessen JP, Beijerinck HC, Verhaar BJ. Polarization effects in collision-induced intramultiplet mixing for Ne. PHYSICAL REVIEW LETTERS 1986; 57:1577-1580. [PMID: 10033489 DOI: 10.1103/physrevlett.57.1577] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
32
|
Lorenzen J, Hotop H, Ruf MW. The interaction of metastable Ne(3s 3 P 2,3 P 0) atoms with alkali atoms. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/bf01436681] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
33
|
Düren R, Hasselbrink E. Orientation effects in the scattering of Na(3 2P3/2) and K(4 2P3/2) with rare gas targets at thermal energies. J Chem Phys 1986. [DOI: 10.1063/1.451818] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
34
|
Ukai M, Tanaka Y, Koizumi H, Shinsaka K, Hatano Y. Temperature dependence of the rate constants for deexcitation of He(2 1P) by SF6and Ar. J Chem Phys 1986. [DOI: 10.1063/1.449916] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
35
|
|
36
|
Ukai M, Koizumi H, Shinsaka K, Hatano Y. Temperature dependence of the rate constants for deexcitation of Ar(1P1) and Ar(3P1) by SF6and N2. J Chem Phys 1986. [DOI: 10.1063/1.450249] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|