中等能量入射的质子,α粒子与氦原子碰撞的电荷转移  

CHARGE TRANSFER FOR PROTON AND α PARTICLE COLLIDING WITH HELIUM ATOM AT INTERMEDIATE ENERGIES 

作　　者：周效信[1] 李白文[1] 

机构地区：[1]中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室

出　　处：《物理学报》1999年第8期1426-1432,共7页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：将最近引入的渐近两态原子轨道展开方法用来研究双电子碰撞体系 Ｈ＋ ＋ Ｈｅ 和 Ｈｅ２ ＋ ＋ Ｈｅ 的电荷转移过程．结果表明，由该方法得到的电子俘获截面在中高能区与满足边界条件的一级波恩近似（ 即 Ｂ１ Ｂ 近似） 和实验结果符合得很好，并且在中低能区，比 Ｂ１ Ｂ 方法有很大改善，然后指出了由一级微扰理论所得结果在中低能区与实验结果不符的原因．Charge transfer processes for double\|electron colliding systems H\+++He and He\+\{2+\}+He have been studied by using the asymptotic two\|state atomic expansion method developed recently.Our results for the cross sections of electron capture are in good agreement with those given by the boundary\|corrected first\|order Born (B1B) approximation and experimental data in high\|intermediate energies,and in the low\|intermediate energies the present results are better than those obtained by the B1B approximation.Finally,we point out that the reason that capture cross sections predicted by first\|order perturbation theory are in poor agreement with experimental data. PACC: 3470

关 键 词：质子 Α粒子 氦原子 电荷转移 离子原子碰撞 

分 类 号：O562.5[理学—原子与分子物理]