LEVEL-CROSSING STUDIES OF NA2 USING LASER-INDUCED FLUORESCENCE

被引:72
作者
MCCLINTO.M
DEMTRODE.W
ZARE, RN
机构
[1] National Bureau of Standards, Department of Physics and Astrophysics, University of Colorado, Boulder
[2] Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder
[3] Physkalisches Institut der Universitat, Freiberg
[4] Chemistry Department, Columbia University
关键词
D O I
10.1063/1.1671978
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The technique of using laser excitation to study level crossings in molecules has been developed and used to determine the radiative lifetime of an excited state of Na2. Optical detection of level crossing in the v′=10, J′=12 level of the B 1∏u electronic state of Na2, excited by the 4765-Å argon-ion laser line, has resulted in a precise measurement of the product gτ=4.11±0. 12×10-11 sec, corresponding to a magnetic field half-width of 1385±42 G. If the g value is calculated assuming Hund's coupling case (a), the radiative lifetime is determined to be τ=6.41±0. 38×10-9 sec. The influence of molecular hyperfine structure on this measurement is discussed and is found in general to contribute little uncertainty to the value of the radiative lifetime, provided the rotational angular momentum is much larger than the nuclear spin and/or provided the hyperfine interaction is much smaller than the natural width of the excited state.
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页码:5509 / &
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