OPTOGALVANIC SPECTRA OF CALCIUM IN THE 6090-6760 ANGSTROM REGION

被引：11

作者：

KHAN, MA

GONDAL, MA

RAIS, MH

机构：

[1] Laser Research Laboratory, Energy Resources Division, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran

来源：

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY | 1993年 / 57卷 / 02期

关键词：

D O I：

10.1007/BF00425996

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optogalvanic spectra of some 30 transitions of calcium originating from the ground state as well as from several excited states (4s4p P-1, P-3, 4s3d 1,3D, 4s5p 3P, 3d4p 3D, 3F) have been investigated using laser-irradiation of a low-current glow discharge in a thermionic diode. The influence of various experimental parameters such as bias field, oven temperature and buffer gas pressure on the spectra are reported. Seven previously unreported transitions are recorded including four ''forbidden'' transitions which violate the J selection rules. An interesting anomaly observed in the non-statistical population of the 4s3d 3D3,2,1 multiplet is discussed where the populations of 3D3 : 3D2 : 3D1 are in the ratio of 94 : 5 : 1. A possible explanation is based on avoided crossing between potential energy curves of the Ca-Ar molecule.

引用

页码：123 / 130

页数：8

共 46 条

[1]

Bashkin S., 1978, ATOMIC ENERGY LEVELS, VII

[2] INFLUENCE OF OPTICAL FACTORS ON THE RELAXATION SIGNAL OF AN OPTICALLY PUMPED VAPOR [J].