快速离子-原子碰撞中的多重电离：反冲动量与入射粒子能量损失的同步测量

Multiple ionization in fast ion-atom collisions: simultaneous measurement of recoil momentum and projectile energy loss.

作者信息

Abdallah MA, Vane CR, Havener CC, Schultz DR, Krause HF, Jones N, Datz S

机构信息

Physics Division, Oak Ridge National Laboratory, Building 5500, P.O. Box 2008, Oak Ridge, Tennessee 37831-6377, USA.

出版信息

Phys Rev Lett. 2000 Jul 10;85(2):278-81. doi: 10.1103/PhysRevLett.85.278.

DOI:10.1103/PhysRevLett.85.278

PMID:10991262

Abstract

We report on the first experiment that measures simultaneously the full momentum vector of recoil ions and projectile energy loss and scattering angle in ion-atom collisions. We studied multiple ionization in the collisions of 0.83-MeV/u O7+ with Ne. Recoil ions ( Ne(q+), q = 1-8) were detected in coincidence with single capture to O6+. The results give the first experimental evidence for the increase of the average electron energy with increasing recoil charge state q. The average ejection angle shows a dramatic decrease with q. Results are compared with n-electron classical trajectory Monte Carlo calculations.

摘要

我们报道了首个同时测量离子 - 原子碰撞中反冲离子的完整动量矢量、入射粒子能量损失及散射角的实验。我们研究了0.83 MeV/u的O7+与Ne碰撞中的多重电离。反冲离子（Ne(q+)，q = 1 - 8）与单次俘获到O6+同时被探测到。这些结果首次给出了平均电子能量随反冲电荷态q增加而增加的实验证据。平均出射角随q急剧减小。结果与n电子经典轨迹蒙特卡罗计算进行了比较。