Photodetachment of Positronium Negative Ions

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.153401· OSTI ID:21550302

Michishio, K; Tachibana, T; Terabe, H; Nagashima, Y ^[1]; Igarashi, A ^[2]; Wada, K; Yagishita, A; Hyodo, T ^[3]; Kuga, T ^[4]

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1. Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601 (Japan)
2. Faculty of Engineering, Miyazaki University, Miyazaki 889-2192 (Japan)
3. Institute of Materials Structure Science, High Energy Accelerator Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
4. Institute of Physics, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902 (Japan)

Photodetachment of the positronium negative ion, a bound state of one positron and two electrons, has been observed. Development of a method to produce the ions efficiently using a Na coated tungsten surface has enabled the first observation of the photodetachment. The obtained lower limit of the photodetachment cross section for the wavelength of 1064 nm is consistent with the theoretical calculations reported so far. The experimental field developed in the present work gives new opportunities to explore the quantum mechanical three-body problem and to develop energy-tunable positronium beams.

• OSTI ID: 21550302
• Journal Information: Physical Review Letters, Vol. 106, Issue 15; Other Information: DOI: 10.1103/PhysRevLett.106.153401; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANIONS
BEAMS
BOUND STATE
CROSS SECTIONS
ELECTRONS
POSITRONIUM
POSITRONS
QUANTUM MECHANICS
SURFACES
THREE-BODY PROBLEM
TUNGSTEN
WAVELENGTHS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CHARGED PARTICLES
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
IONS
LEPTONS
MANY-BODY PROBLEM
MATTER
MECHANICS
METALS
REFRACTORY METALS
TRANSITION ELEMENTS