ISSN:
1434-6079
Keywords:
33.45.B
;
35.20.P
;
35.80
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We derive analytical expressions for Stark quantum beat signals of polyatomic molecules and discuss them with regard to molecular and geometrical parameters. The general treatment is specified for near prolate asymmetric rotor molecules and a method for determining rotational constants and all components of the dipole moment of electronically excited polyatomic molecules is presented. The method is tested and illustrated for the vibrationlessS 1 state of deuterated propynal (HC ≡ CCDO,C s symmetry) and its lowest frequency non-totally symmetric state 121. The results of the vibrationless state are compared with structural data reported in the literature. For the 121 state we obtainA=1.5004(43) cm−1,B=0.16131(34) cm−1,C=0.14623(34) cm−1, and the components of the electric dipole moment in the molecular plane μ a =−0.88(2)D, μ b =1.03(2)D. Furthermore, it is shown that the modulation depth of Stark quantum beat signals can be utilized to quantify the contribution of the individual components of the transition moment to the total emission.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01418166
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