Semiclassical description of antiproton capture on atomic helium

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.2779· OSTI ID:6138637

Beck, W A ^[1]; Wilets, L ^[2]; Alberg, M A ^[3]

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1. Department of Physics, University of Washington, Seattle, Washington 98195 (United States) Quantum Medical Systems, Issaquah, Washington 98027 (United States)
2. Department of Physics, University of Washington, Seattle, Washington 98195 (United States)
3. Department of Physics, University of Washington, Seattle, Washington 98195 (United States) Department of Physics, Seattle University, Seattle, Washington 98122 (United States)

A semiclassical, many-body atomic model incorporating a momentum-dependent Heisenberg core to stabilize atomic electrons is used to study antiproton capture on helium. Details of the antiproton collisions leading to eventual capture are presented, including the energy and angular-momentum states of incident antiprotons which result in capture via single- or double-electron ionization, i.e., into He[sup 2+][ital [bar p]] or He[sup +][ital [bar p]], and the distribution of energy and angular-momentum states following the Auger cascade. These final states are discussed in light of recently reported anomalously long-lived antiproton states observed in liquid He [Iwasaki [ital et] [ital al]., Phys. Rev. Lett. 67, 1246 (1991)].

• OSTI ID: 6138637
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:4; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR MOMENTUM
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
ATOM COLLISIONS
ATOMS
BARYONS
CAPTURE
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
GASES
HADRONS
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
MANY-BODY PROBLEM
MATTER
NONMETALS
NUCLEI
NUCLEONS
RARE GASES
SEMICLASSICAL APPROXIMATION
TRAPPING