Semi-Classical Description of Antiproton Capture on Atomic Helium

Details Semi-Classical Description of Antiproton Capture on Atomic Helium Semi-Classical Description of Antiproton Capture on Atomic Helium

1993-04-15

arxiv.org/abs/nucl-th/9304012v1

Physics

Nuclear Physics

Nuclear Theory

15 pages, 9 figures may be obtained from authors, Revtex

Scientific paper

10.1103/PhysRevA.48.2779

A semi-classical, 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$^{++}\,\bar p$ or He$^{+}\,\bar p$], 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.

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