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DOE OSTI · 1237156

Nuclear annihilation by antinucleons

Lee, Teck-Ghee·Wong, Cheuk-Yin
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Abstract

We examine the momentum dependence of $\bar{p}$p and $\bar{n}$p annihilation cross sections by considering the transmission through a nuclear potential and the $\bar {p}$p Coulomb interaction. Compared to the $\bar{n}$p annihilation cross section, the $\bar{p}$p annihilation cross section is significantly enhanced by the Coulomb interaction for projectile momenta below p lab < 500 MeV/c, and the two annihilation cross sections approach the Pomeranchuk's equality limit [JETP 30, 423 (1956)] at p lab ~500 MeV/c. Using these elementary cross sections as the basic input data, the extended Glauber model is employed to evaluate the annihilation cross sections for $\bar{n}$ and $\bar{p}$ interaction with nuclei and the results compare well with experimental data.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS

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Lee, Teck-Ghee, Wong, Cheuk-Yin. 2016-01-25. Nuclear annihilation by antinucleons. https://doi.org/10.1103/physrevc.93.014616

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