The nonradiative charge-transfer processes of Be 3+ (1s)/B 4+ (1s) colliding with He(1s 2 ) are investigated by the quantum-mechanical molecular orbital close-coupling (QMOCC) method from 10 eV/u to 1800 eV/u. Total and state-selective cross sections are obtained and compared with other results available. Although the incident ions have the same number of electrons and collide with the same target, their cross sections are different due to the differences in molecular structure. For Be 3+ (1s) + He(1s 2 ), only single-electron-capture (SEC) states are important and the total cross sections have a broad maximum around E = 150 eV/u. While for B 4+ (1s) + He(1s 2 ), both the SEC and double-electron-capture (DEC) processes are important, and the total SEC and DEC cross sections decrease rapidly with the energy decreasing.

中文翻译：

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Be 3+和B 4+离子与He的低能碰撞中的电荷转移

通过量子力学分子轨道紧密耦合（QMOCC）方法研究了Be 3+（1s）/ B 4+（1s）与He（1s 2）碰撞的非辐射电荷转移过程，其从10 eV / u到1800 eV / u。获得总截面和状态选择截面，并将其与其他可用结果进行比较。尽管入射离子具有相同数量的电子并与相同的靶碰撞，但是由于分子结构的不同，它们的横截面也不同。对于Be 3+（1s）+ He（1s 2），仅单电子捕获（SEC）状态很重要，总横截面在E = 150 eV / u附近具有很大的最大值。对于B 4+（1s）+ He（1s 2），SEC和双电子捕获（DEC）过程均很重要，随着能量的降低，SEC和DEC的总横截面迅速减小。