Production and decay of K-shell hollow krypton in collisions with 52–197-MeV/u bare xenon ions

Production and decay of K-shell hollow krypton in collisions with 52–197-MeV/u bare xenon ions X-ray spectra of K-shell hollow krypton atoms produced in single collisions with 52–197-MeV/u Xe54+ ions are measured in a heavy-ion storage ring equipped with an internal gas-jet target. Energy shifts of the Kα1,2s, Kα1,2h,s, and Kβ1,3s transitions are obtained. Thus the average number of the spectator L vacancies presented during the x-ray emission is deduced. From the relative intensities of the Kα1,2s and Kα1,2h,s transitions, the ratio of K-shell hollow krypton to singly K-shell ionized atoms is determined to be 14%–24%. In the considered collisions, the K vacancies are mainly created by the direct ionization which cannot be calculated within the perturbation descriptions. The experimental results are compared with a relativistic coupled-channel calculation performed within the independent particle approximation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

Production and decay of K-shell hollow krypton in collisions with 52–197-MeV/u bare xenon ions

Abstract

X-ray spectra of K-shell hollow krypton atoms produced in single collisions with 52–197-MeV/u Xe54+ ions are measured in a heavy-ion storage ring equipped with an internal gas-jet target. Energy shifts of the Kα1,2s, Kα1,2h,s, and Kβ1,3s transitions are obtained. Thus the average number of the spectator L vacancies presented during the x-ray emission is deduced. From the relative intensities of the Kα1,2s and Kα1,2h,s transitions, the ratio of K-shell hollow krypton to singly K-shell ionized atoms is determined to be 14%–24%. In the considered collisions, the K vacancies are mainly created by the direct ionization which cannot be calculated within the perturbation descriptions. The experimental results are compared with a relativistic coupled-channel calculation performed within the independent particle approximation.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1050-2947
eISSN
1094-1622
D.O.I.
10.1103/PhysRevA.96.012708
Publisher site
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Abstract

X-ray spectra of K-shell hollow krypton atoms produced in single collisions with 52–197-MeV/u Xe54+ ions are measured in a heavy-ion storage ring equipped with an internal gas-jet target. Energy shifts of the Kα1,2s, Kα1,2h,s, and Kβ1,3s transitions are obtained. Thus the average number of the spectator L vacancies presented during the x-ray emission is deduced. From the relative intensities of the Kα1,2s and Kα1,2h,s transitions, the ratio of K-shell hollow krypton to singly K-shell ionized atoms is determined to be 14%–24%. In the considered collisions, the K vacancies are mainly created by the direct ionization which cannot be calculated within the perturbation descriptions. The experimental results are compared with a relativistic coupled-channel calculation performed within the independent particle approximation.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Jul 28, 2017

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