Scattering of protons and antiprotons by hydrogen atoms

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: impact parameter method excitation cross sections back coupling sign of the projectile charge
• 年，卷（期）: 2002,（12）
• 页码范围: 1259-1266
• 页数: 8页
• 分类号: O4
• 语种: 英文

摘要

The two-, four-, five- and fourteen-state approximations of the impact parameter method have been applied to the excitation of hydrogen atoms by proton (p) and antiproton (p-) impact. The effect of both channel and back couplings on the 2s and 2p excitations are investigated. The total cross sections are calculated for incident energies ranging from 1 to 2500 keV. It is found that the effect of both channel and back couplings on the antiproton-induced reactions is greater than on that induced by protons. We compare the results with those of other theoretical and experimental works.