POLARIZATION OF RADIATION FROM H-2 EXCITED BY ELECTRON-IMPACT - LYMAN AND WERNER EMISSIONS AND LYMAN-ALPHA

被引:43
作者
MALCOLM, IC
DASSEN, HW
MCCONKEY, JW
机构
[1] Physics Department, University of Windsor, Windsor
关键词
D O I
10.1088/0022-3700/12/6/017
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The polarisation of selected Lyman and Werner bands and also of Lyman- alpha radiation are measured as a function of impact electron energy in the range from threshold to 300 eV. Polarisations in excess of 0.2 are obtained in certain instances. The results for Lyman- alpha confirm and extend those of Ott et al. (1970). Extrapolations of the results to the thresholds are compared with estimates based on angular-momentum conservation and symmetry arguments. For the Werner emission a further comparison is made with a 'pseudo'-threshold polarisation measurement using the scattered-electron-delayed-photon coincidence technique. The apparent excitation functions for the two molecular emissions are derived from the measurements of polarisation. In both cases good agreement is obtained with the semi-empirical data of Gerhart (1975). Comparison is made with the results of other workers wherever possible.
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页码:1003 / 1017
页数:15
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