Phys. Rev. A 70, 032501 (2004) [9 pages]Antiproton slowing down, capture, and decay in low-pressure helium gasReceived 17 February 2004; published 7 September 2004 Data on p̅ slowing down and capture in helium at 1 and 0.2 mb at room temperature are presented and compared to the corresponding previously publicated data in molecular hydrogen and deuterium. A Monte Carlo simulation containing a low-energy extrapolation of measured p̅ electronic stopping power in helium gas, screened Rutherford collisions, and simple cascade mechanisms is able to reproduce the gross features of the data, but cannot explain some nontrivial details of the measured distributions. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.032501
DOI:
10.1103/PhysRevA.70.032501
PACS:
36.10.−k, 34.50.Bw
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