ABSOLUTE CROSS-SECTIONS FOR 2S-2P EXCITATION OF N-4(+) BY ELECTRON-IMPACT

被引:56
作者
GREGORY, D
DUNN, GH
PHANEUF, RA
CRANDALL, DH
机构
[1] NBS,BOULDER,CO 80309
[2] UNIV COLORADO,JOINT INST LAB ASTROPHYS,BOULDER,CO 80309
[3] OAK RIDGE NATL LAB,OAK RIDGE,TN 37830
来源
PHYSICAL REVIEW A | 1979年 / 20卷 / 02期
关键词
D O I
10.1103/PhysRevA.20.410
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Absolute cross sections have been measured for 1s22s S122-1s22p P12,322 excitation of lithiumlike N4+ by electron impact. For this process, which has a threshold at 10 eV, relative cross sections measured at several energies between 4 and 52 eV were normalized to a single absolute measurement taken at 15.5 eV. Similar data for Li-like C3+ have been previously reported and are presented for comparison. In both cases, allowing for the experimental electron energy spread, the measurements agree within experimental uncertainties with published Coulomb-Born and close-coupling calculations over the entire experimental energy range. Rate coefficients as a function of electron temperature are also presented for the N4+ transition. © 1979 The American Physical Society.
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收藏
页码:410 / 420
页数:11
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