Ionization process of the hydrogen atom, being initially in the excited 2p-state, projected by 30 keV proton and antiproton impact has been investigated. The second-Born approximation (SBA) is used to measure the triple differential cross sections (TDCSs). The closure relation is employed on the second-Born term to come over consideration of the intermediate states. The triple differential cross-sections are represented graphically against the ejection angle, for two scattering angles and ejected energies into both scattering and perpendicular geometric planes. The single differential cross-section (SDCS) is calculated in the framework of the first-Born approximation.

氢原子的电离过程，最初处于激发的 2p 态，由 30 keV 质子和反质子撞击投射。次生近似 (SBA) 用于测量三重微分横截面 (TDCS)。闭包关系用于第二项，以克服对中间状态的考虑。对于两个散射角和射入散射和垂直几何平面的能量，三重微分横截面相对于射出角以图形方式表示。单微分截面 (SDCS) 是在 first-Born 近似的框架内计算的。