Investigation of transitions between metastable levels of the first excited configuration of palladium-like tungsten

被引：30
|
作者：
Qiu, M. L. [1 ,2 ]
Zhao, R. F. [1 ,2 ]
Guo, X. L. [1 ,2 ]
Zhao, Z. Z. [1 ,2 ]
Li, W. X. [1 ,2 ]
Du, S. Y. [1 ,2 ]
Xiao, J. [1 ,2 ]
Yao, K. [1 ,2 ]
Chen, C. Y. [1 ,2 ]
Hutton, R. [1 ,2 ]
Zou, Y. [1 ,2 ]
机构：
[1] Fudan Univ, Inst Modern Phys, Shanghai EBIT Lab, Shanghai 200433, Peoples R China
[2] Fudan Univ, Minist Educ, Key Lab, Appl Ion Beam Phys Lab, Shanghai 200433, Peoples R China
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2014年 / 47卷 / 17期
基金：
中国国家自然科学基金;
关键词：
tungsten; palladiu-like; EBIT; metastable; spectroscopy; PERTURBATION-THEORY APPROACH; PD-LIKE IONS; ABSORPTION-LINES; SPECTRA; SPECTROSCOPY; WAVELENGTHS; PLASMAS; REGION;
D O I：
10.1088/0953-4075/47/17/175002
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Spectroscopy in the wavelength region of 330 nm to 400 nm for highly charged tungsten was performed using the High Temperature Super Conducting Electron Beam Ion Trap (SH-HtscEBIT) at Fudan University. Three lines from palladium-like tungsten (W28+) were identified as transitions between metastable levels in the first excited configuration ([Kr]4d(9)4f). A second-order relativistic many-body perturbation theory approach and a simple collisional radiative model were used to theoretically study the fine structure levels of the 4d(9)4f configuration. The calculated results show qualitative agreement with experiment. We conclude that some levels in the 4d(9)4f excited configuration have extremely long lifetimes and may exhibit extraordinarily high populations, possibly leading to indirect ionization in, for example, fusion plasmas.
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页数：8
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