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FIZIKA B 8 (1999) 4, 535-544
 
THE INFLUENCE OF REACCELERATION ON THE ANTIPROTON ABUNDANCE IN THE
INTERSTELLAR MEDIUM AND ITS ATTENUATION IN THE ATMOSPHERE
R. K. SAHA, R. MAJUMDAR, P. PAL and D. P. BHATTACHARYYA
Indian Association for the Cultivation of Science, Jadavpur,
Calcutta 700032, India
Received 4 January 1999; revised manuscript received 12 October 1999
Accepted 20 December 1999
An estimation has been made of the influence of reaccelaration on the abundance of
secondary`p flux in the interstellar medium, initiated by
primary cosmic ray proton collisions in the confined p+He gases in the medium. The
calculated `p spectrum and `p/p
flux ratio have been compared with the calculated results of Simon and Heinbach and also
with the experimental data of Golden et al. and Hof et al. The present derivation is based
on the production of antiprotons in the atmosphere by primary protons at several small
depths. The results are also presented as ratios relative to the secondary`p flux at depth of 1 gm/cm2 of atmosphere. Another
investigation has been made of the energy spectrum of atmospheric antiprotons from primary
elemental spectra obtained from the direct measurements using the active and passive
detectors borne by balloons and satellites, fitted using a standard propagation diffusion
equation and the Z factors from accelerator interaction cross-sections.
PACS numbers: 13.85.Tp, 98.70.Sa
UDC 539.126
Keywords: secondary`p flux in the interstellar medium,
influence of reaccelaration, production of antiprotons in the atmosphere, energy spectrum
of atmospheric antiprotons
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