Laboratory measurements of Fe XXIV L-shell line emission

被引:21
作者
Savin, DW
Beiersdorfer, P
LopezUrrutia, JC
Decaux, V
Gullikson, EM
Kahn, SM
Liedahl, DA
Reed, KJ
Widmann, K
机构
[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720
[3] UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720
[4] LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550
[5] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720
关键词
atomic data; atomic processes; methods; laboratory; X-rays; general;
D O I
10.1086/310300
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Recent ASCA spectra exhibit discrepancies with the relative line intensities of various Fe XXIII and XXIV L-shell emission lines predicted by standard plasma emission codes. To address this issue, we have carried out a series of high-resolution, broadband measurements of Fe XXIV line emission using an electron beam ion trap facility. X-ray lines produced in the trap are detected and resolved using Bragg crystal spectrometers. We report measurements of 3 --> 2 and 4 --> 2 transitions, which result primarily from electron impact excitation. Overall, good agreement is found with distorted wave calculations.
引用
收藏
页码:L73 / L76
页数:4
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