Atomic-number dependence of the magnetic-sublevel population in the autoionization state formed in dielectronic recombination

Zhimin Hu, Yueming Li, Xiaoying Han, Daiji Kato, Xiaomin Tong, Hirofumi Watanabe, and Nobuyuki Nakamura
Phys. Rev. A 90, 062702 – Published 1 December 2014

Abstract

The magnetic-sublevel population of the autoionization state formed in dielectronic recombination (DR) of highly charged heavy ions has been experimentally investigated by combining two types of measurements with an electron beam ion trap. The two different measurements are the differential x-ray measurement at 90 with respect to the electron beam and the integral resonance-strength measurement. The alignment parameter, which denotes the magnetic-sublevel population distribution, has been obtained for the autoionization states [1s2s22p1/2]1 formed in DR of Li-like Pr (atomic number Z=59) and Ho (Z=67). This work is a complement to our previous work [Phys. Rev. Lett. 108, 073002 (2012)] on Li-like Au (Z=79). The experimental results are in reasonable agreement with theoretical predictions, and a strong Z-dependent tendency due to the Breit interaction has been confirmed.

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  • Received 28 August 2014
  • Revised 15 October 2014

DOI:https://doi.org/10.1103/PhysRevA.90.062702

©2014 American Physical Society

Authors & Affiliations

Zhimin Hu1,2,3,*, Yueming Li4, Xiaoying Han4, Daiji Kato5,6, Xiaomin Tong7,8, Hirofumi Watanabe9, and Nobuyuki Nakamura1

  • 1Institute for Laser Science, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
  • 2Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  • 3Physics Institute, Heidelberg University, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany
  • 4Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100088, China
  • 5National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
  • 6Department of Fusion Science, The Graduate University of Advanced Studies (SOKENDAI), Toki, Gifu 509-5292, Japan
  • 7Division of Materials Science, Faculty of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
  • 8Center for Computational Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
  • 9Center of Applied Superconductivity and Sustainable Energy Research, Chubu University, Kasugai, Aichi 487-8501, Japan

  • *hu@physi.uni-heidelberg.de

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Vol. 90, Iss. 6 — December 2014

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