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Projectile and target excitation in He+ + He collisions at intermediate energies
Matter and Radiation at Extremes ( IF 5.1 ) Pub Date : 2021-01-01 , DOI: 10.1063/5.0025623
Junwen Gao 1 , Zhimin Hu 1 , Yong Wu 2, 3 , Jianguo Wang 2 , Nicolas Sisourat 4 , Alain Dubois 4
Affiliation  

We present ab initio calculations of cross sections for projectile and target excitation occurring in the course of He+ + He collisions using a three-active-electron semiclassical nonperturbative approach. Intermediate impact energies ranging from 1 keV to 225 keV/u are considered. The results of our calculations agree well with available measurements for both projectile and target excitation in the respective overlapping energy regions. A comparison of our results with those of other theoretical calculations further demonstrates the importance of a nonperturbative approach that includes a sufficient number of channels. Furthermore, it is found that the cross sections for target excitation into singlet states show a valley centered at about 25 keV/u, resulting from competition with electron transfer to singlet projectile states. By contrast, the cross sections for target excitation into triplet states do not exhibit any such structures.

中文翻译:

He++ He 碰撞中的弹丸和目标激发在中间能量

我们使用三活性电子半经典非微扰方法从头计算在 He + + He 碰撞过程中发生的射弹和目标激发的横截面。考虑了 1 keV 到 225 keV/u 范围内的中间冲击能量。我们的计算结果与相应重叠能量区域中弹丸和目标激发的可用测量结果非常吻合。将我们的结果与其他理论计算的结果进行比较,进一步证明了包含足够数量通道的非微扰方法的重要性。此外,发现目标激发到单线态的横截面显示出一个以约 25 keV/u 为中心的谷,这是由于电子转移到单线态的竞争所致。相比之下,
更新日期:2021-01-01
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