Bound→free emission spectra and photoassociation of 114Cd2 and 64Zn2
- 15 October 1991
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 95 (8) , 5539-5552
- https://doi.org/10.1063/1.461627
Abstract
Structured bound‐free emission spectra of 64Zn2 and 114Cd2 have been observed by photoassociating pairs of ground state atoms (ns2 1S0, n=4 and 5 for Zn and Cd, respectively) at several discrete wavelengths in the 222–277 nm region. The observed fluorescence is attributed to B 1Σ+u→X 1Σ+g transitions of the molecules where the bound excited state is correlated with np 1P1+ns2 1S0 in the separated atom limit. The pressure dependence of the emission intensity demonstrates that the dominant 1Σ+u production mechanism is photoassociation. Numerical, quantum mechanical simulations of the experimental spectra yield 1Σ+u spectroscopic constants that are generally ∼10% larger than ab initio values in the literature.Keywords
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