Cascade Transition X-Rays From Electron Capture Into Highly Charged Ions in Collisions With Neutral Gas Targets

Published

May 1, 2003

Author(s)

H Tawara, E Takacs, L P. Ratliff, John D. Gillaspy, K Tokesi

Abstract

X-rays originating from a series of the cascades after electron capture into highly excited Rydberg states have been observed from low states have been observed from low energy, highly charged Kr¹⁺ ions (q=27-36) colliding with neutral Ar atoms. The intensity ratio between L (n=3->2) x-rays and the sum of M x-rays (n=4->3, n=5->3, n=6->3 etc.) is drastically changed from Kr²⁷⁺ to Kr²⁸⁺ and constant for higher ion charge states (q=29-36). This feature can be understood to be due to the metastable states formed during cascades after electron capture into Kr²⁷⁺ ions. This is also supported by time-dependent population calculations.

Citation

Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment

Volume

25

Pub Type

Journals

Keywords

charge exchange, highly charged ions, ion-atom collisions, x-rays

Citation

Tawara, H. , Takacs, E. , Ratliff, L. , Gillaspy, J. and Tokesi, K. (2003), Cascade Transition X-Rays From Electron Capture Into Highly Charged Ions in Collisions With Neutral Gas Targets, Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment (Accessed October 10, 2025)