He+离子和Ar原子碰撞过程中激发态的研究

在He⁺离子和Ar原子碰撞过程中,同样存在着电子俘获激发和直接激发两种过程。本文把实验结果同He⁺离子和Ne原子碰撞体系进行了比较,发现:在入射离子速度较小时,实验所得到的Hel三重态发射截面要大得多;当入射离子He⁺的速度大于一个原子单位(2.2×10⁸cm/s)时,情况则相反。因此,在俘获电子过程中,势能亏损同He⁺离子的入射速度是两个非常重要的因素,而且它们之间存在一个竞争过程。入射离子He 关键词：

EXPERIMENTAL STUDIES OF EXCITED STATES IN COLLISIONS BETWEEN He+ AND Ar

One electron capture process and direct exciting process both occured in collision between-He⁺ and Ar in energy range 70-150 keV. From the comparison of experimental results between He⁺+Ar and He⁺+Ne collision systems, we see that the emission cross sections of the triplet Hel of the former are much larger than those of the latter, when the velocity of incident ion He⁺ is small. The latter become larger than the former, when the velocity of He⁺ is greater than 1.0 a.u (2.2×10⁸ cm/s). Therefore, the potential energy defect and the velocity of projectile are very important factors in the electron capture process and there is a competition between them-in collisions.