In addition to the Thomas peak, occurs at 0.47 mrad, another peak has been observed at ≈ 0.75 mrad in a recent measurement for projectile angular differential cross sections of single electron capture in proton-helium collision at impact energies of MeV region [M. Gudmundsson et al., J. Phys. B 43, 185209 (2010)]. Stimulated by this report, the differential cross section is calculated based on the first Born approximation for single ionization of helium by proton impact. Calculations with and without interelectron correlation give almost the same results, and the peak observed experimentally near 0.75 mrad is not accounted for in the treatment.
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机译：除了在0.47 mrad处出现的托马斯峰外，在最近的测量中，在MeV区域的碰撞能量下质子-氦碰撞中单电子俘获的弹丸角微分截面中还观察到了另一个峰在≈0.75 mrad处[M. Gudmundsson等，《物理学报》。 B 43，185209（2010）]。受此报告的激励，基于通过质子碰撞对氦进行单次电离的首次Born近似计算微分截面。具有和不具有电子间相关性的计算得出的结果几乎相同，并且在实验中未考虑到在0.75 mrad附近实验观察到的峰。
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