Inelastic cross section for antihelium on nuclei: an empirical formula for use in the experiments to search for cosmic antimatter |
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| Authors: | A A Moiseev and J F Ormes |
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| Institution: | NASA/GSFC, Greenbelt, MD 20771, USA |
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| Abstract: | An empirical formula for the cross section for inelastic hadronic interaction of antihelium with nuclei for the projectile energy range from 0.3 GeV/n to 80 GeV/n and target atomic mass number A from 4 to 120 has been developed. It is based on the available experimental data of nucleon (antinucleon) — nucleus and helium — nucleus inelastic cross sections. Such a formula is needed by experiments designed to search for antihelium in cosmic rays. With this formula one can estimate the efficiency of antihelium detection and correct for antihelium attenuation in the atmosphere for the balloon-borne experiments. A byproduct of this work is an empirical formula for antiproton-nucleus inelastic cross. |
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