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Janka G, Ohayon B, Burkley Z, Gerchow L, Kuroda N, Ni X, Nishi R, Salman Z, Suter A, Tuzi M, Vigo C, Prokscha T, Crivelli P. Intense beam of metastable Muonium. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS 2020; 80:804. [PMID: 32922165 PMCID: PMC7462919 DOI: 10.1140/epjc/s10052-020-8400-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Precision spectroscopy of the Muonium Lamb shift and fine structure requires a robust source of 2S Muonium. To date, the beam-foil technique is the only demonstrated method for creating such a beam in vacuum. Previous experiments using this technique were statistics limited, and new measurements would benefit tremendously from the efficient 2S production at a low energy muon ( < 20 keV) facility. Such a source of abundant low energyμ + has only become available in recent years, e.g. at the Low-Energy Muon beamline at the Paul Scherrer Institute. Using this source, we report on the successful creation of an intense, directed beam of metastable Muonium. We find that even though the theoretical Muonium fraction is maximal in the low energy range of 2-5 keV, scattering by the foil and transport characteristics of the beamline favor slightly higherμ + energies of 7-10 keV. We estimate that an event detection rate of a few events per second for a future Lamb shift measurement is feasible, enabling an increase in precision by two orders of magnitude over previous determinations.
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Affiliation(s)
- G. Janka
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - B. Ohayon
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - Z. Burkley
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - L. Gerchow
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - N. Kuroda
- Institute of Physics, The University of Tokyo, Tokyo, 153-8902 Japan
| | - X. Ni
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - R. Nishi
- Institute of Physics, The University of Tokyo, Tokyo, 153-8902 Japan
| | - Z. Salman
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - A. Suter
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - M. Tuzi
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - C. Vigo
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
| | - T. Prokscha
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - P. Crivelli
- Institute for Particle Physics and Astrophysics, ETH Zürich, 8093 Zurich, Switzerland
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NAGAMINE K. Radiography with cosmic-ray and compact accelerator muons; Exploring inner-structure of large-scale objects and landforms. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2016; 92:265-289. [PMID: 27725469 PMCID: PMC5243946 DOI: 10.2183/pjab.92.265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Accepted: 08/05/2016] [Indexed: 06/06/2023]
Abstract
Cosmic-ray muons (CRM) arriving from the sky on the surface of the earth are now known to be used as radiography purposes to explore the inner-structure of large-scale objects and landforms, ranging in thickness from meter to kilometers scale, such as volcanic mountains, blast furnaces, nuclear reactors etc. At the same time, by using muons produced by compact accelerators (CAM), advanced radiography can be realized for objects with a thickness in the sub-millimeter to meter range, with additional exploration capability such as element identification and bio-chemical analysis. In the present report, principles, methods and specific research examples of CRM transmission radiography are summarized after which, principles, methods and perspective views of the future CAM radiography are described.
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Affiliation(s)
- Kanetada NAGAMINE
- Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, Japan
- Department of Physics & Astronomy, University of California, Riverside, CA92521, U.S.A.
- Muon Science Laboratory, Institute of Materials Structure Science, KEK, Oho, Tsukuba, Ibaraki, Japan
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Antognini A, Crivelli P, Prokscha T, Khaw KS, Barbiellini B, Liszkay L, Kirch K, Kwuida K, Morenzoni E, Piegsa FM, Salman Z, Suter A. Muonium emission into vacuum from mesoporous thin films at cryogenic temperatures. PHYSICAL REVIEW LETTERS 2012; 108:143401. [PMID: 22540791 DOI: 10.1103/physrevlett.108.143401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Indexed: 05/31/2023]
Abstract
We report on muonium (Mu) emission into vacuum following μ(+) implantation in mesoporous thin SiO(2) films. We obtain a yield of Mu into vacuum of (38±4)% at 250 K and (20±4)% at 100 K for 5 keV μ(+) implantation energy. From the implantation energy dependence of the Mu vacuum yield we determine the Mu diffusion constants in these films: D(Mu)(250 K)=(1.6±0.1)×10(-4) cm(2)/s and D(Mu)(100 K)=(4.2±0.5)×10(-5) cm(2)/s. Describing the diffusion process as quantum mechanical tunneling from pore to pore, we reproduce the measured temperature dependence ∼T(3/2) of the diffusion constant. We extract a potential barrier of (-0.3±0.1) eV which is consistent with our computed Mu work function in SiO(2) of [-0.3,-0.9] eV. The high Mu vacuum yield, even at low temperatures, represents an important step toward next generation Mu spectroscopy experiments.
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Affiliation(s)
- A Antognini
- Institute for Particle Physics, ETH Zurich, Switzerland.
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Liu AH, Li SM, Berakdar J. Laser-assisted muon decay. PHYSICAL REVIEW LETTERS 2007; 98:251803. [PMID: 17678014 DOI: 10.1103/physrevlett.98.251803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Indexed: 05/16/2023]
Abstract
We show theoretically that the muon lifetime can be changed dramatically by embedding the decaying muon in a strong linearly polarized laser field. Evaluating the S-matrix elements taking all electronic multiphoton processes into account we find that a CO(2) laser with an electric field amplitude of 10(6) V cm(-1) results in an order of magnitude shorter lifetime of the muon. We also analyze the dependencies of the decay rate on the laser frequency and intensity.
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Affiliation(s)
- Ai-Hua Liu
- Department of Modern Physics, University of Science and Technology of China, P.O. Box 4, Hefei, Anhui 230026, People's Republic of China
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Meyer V, Bagayev SN, Baird PE, Bakule P, Boshier MG, Breitruck A, Cornish SL, Dychkov S, Eaton GH, Grossmann A, Hubl D, Hughes VW, Jungmann K, Lane IC, Liu YW, Lucas D, Matyugin Y, Merkel J, Reinhard I, Sandars PG, Santra R, Schmidt PV, Scott CA, Toner WT, Towrie M. Measurement of the 1s-2s energy interval in muonium. PHYSICAL REVIEW LETTERS 2000; 84:1136-1139. [PMID: 11017462 DOI: 10.1103/physrevlett.84.1136] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/1999] [Indexed: 05/23/2023]
Abstract
The 1s-2s interval has been measured in the muonium (&mgr;(+)e(-)) atom by Doppler-free two-photon pulsed laser spectroscopy. The frequency separation of the states was determined to be 2 455 528 941.0(9.8) MHz, in good agreement with quantum electrodynamics. The result may be interpreted as a measurement of the muon-electron charge ratio as -1-1.1(2.1)x10(-9). We expect significantly higher accuracy at future high flux muon sources and from cw laser technology.
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Affiliation(s)
- V Meyer
- Physikalisches Institut der Universitat Heidelberg, D-69120 Heidelberg, Germany
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Hughes VW. High Precision Spectroscopy of Positronium and Muonium. ADVANCES IN QUANTUM CHEMISTRY 1998. [DOI: 10.1016/s0065-3276(08)60505-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nagamine K, Miyake Y, Shimomura K, Birrer P, Marangos JP, Iwasaki M, Strasser P, Kuga T. Ultraslow positive-muon generation by laser ionization of thermal muonium from hot tungsten at primary proton beam. PHYSICAL REVIEW LETTERS 1995; 74:4811-4814. [PMID: 10058605 DOI: 10.1103/physrevlett.74.4811] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Baer S, Fleming DG, Sloan JJ, Arseneau DJ, Kolbuszewski M, Wright J, Senba M, Pan JJ, Snooks R. First spectroscopic evidence for a muonium‐containing molecule: NeMu* chemiluminescence. J Chem Phys 1994. [DOI: 10.1063/1.467813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Fee MS, Chu S, Mills AP, Chichester RJ, Zuckerman DM, Shaw ED, Danzmann K. Measurement of the positronium 1 (3)S1-2 (3)S1 interval by continuous-wave two-photon excitation. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1993; 48:192-219. [PMID: 9909589 DOI: 10.1103/physreva.48.192] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Fee MS, Danzmann K, Chu S. Optical heterodyne measurement of pulsed lasers: Toward high-precision pulsed spectroscopy. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:4911-4924. [PMID: 9907574 DOI: 10.1103/physreva.45.4911] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Jungmann K, Baird PEG, Barr JRM, Bressler C, Curley PF, Dixson R, Eaton GH, Ferguson AI, Geerds H, Hughes VW, Kenntner J, Lea SN, Maas F, Persaud MA, zu Putlitz G, Sandars PGH, Schwarz W, Toner WT, Towrie M, Woodman G, Zhang L, Zhang Z. Two-photon laser spectroscopy of the muonium 1S?2S transition. ACTA ACUST UNITED AC 1991. [DOI: 10.1007/bf01426380] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gilligan JM, Eyler EE. High-resolution three-photon spectroscopy and multiphoton interference in molecular hydrogen. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1991; 43:6406-6409. [PMID: 9904980 DOI: 10.1103/physreva.43.6406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Janissen AC, Beer GA, Mason GR, Olin A, Huber TM, Kunselman AR, Bowen T, Halverson PG, Fry CA, Kendall KR, Marshall GM, Warren JB. Muonium production from fine silica powder. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1990; 42:161-169. [PMID: 9903789 DOI: 10.1103/physreva.42.161] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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McIntyre DH, Fairbank WM, Lee SA, Hänsch TW, Riis E. Interferometric frequency measurement of 130Te2 reference transitions at 486 nm. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1990; 41:4632-4635. [PMID: 9903680 DOI: 10.1103/physreva.41.4632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Danzmann K, Fee MS, Chu S. Doppler-free laser spectroscopy of positronium and muonium: Reanalysis of the 1S-2S measurements. PHYSICAL REVIEW. A, GENERAL PHYSICS 1989; 39:6072-6073. [PMID: 9901204 DOI: 10.1103/physreva.39.6072] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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