Perturbation spectroscopy of the He-Cd laser discharge

P. G. Browne; M. H. Dunn

doi:10.1088/0022-3700/7/10/005

Perturbation spectroscopy of the He-Cd laser discharge

P. G. Browne^*, M. H. Dunn

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Chopping the radiation field in the cavity of a helium-cadmium laser operating at 4416 AA induces perturbations in the populations of the 5s ² ²D_3/2,5/2 and 5p ²P_3/2 levels of Cd II. Analysis of the perturbations of the 5p ²P _3/2 and 5s² ²D_5/2 populations shows that the ratio of non-radiative to radiative de-excitation rates for the upper laser level is 0.9+or-0.2, approximately independent of discharge conditions. From the population changes of the 5s² ²D_3/2 level the cross section for excitation from the 5s² ²D_5/2 level by electron collisions is found be be approximately 7*10^-16 cm² and the ratio of this cross section to that for excitation from the 5p ²P_3/2 level is 10^-3.

Original language	English
Article number	005
Pages (from-to)	1113-1121
Number of pages	9
Journal	Journal of Physics B: Atomic and Molecular Physics
Volume	7
Issue number	10
DOIs	https://doi.org/10.1088/0022-3700/7/10/005
Publication status	Published - 1974
Externally published	Yes

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title = "Perturbation spectroscopy of the He-Cd laser discharge",

abstract = "Chopping the radiation field in the cavity of a helium-cadmium laser operating at 4416 AA induces perturbations in the populations of the 5s 2 2D3/2,5/2 and 5p 2P3/2 levels of Cd II. Analysis of the perturbations of the 5p 2P 3/2 and 5s2 2D5/2 populations shows that the ratio of non-radiative to radiative de-excitation rates for the upper laser level is 0.9+or-0.2, approximately independent of discharge conditions. From the population changes of the 5s2 2D3/2 level the cross section for excitation from the 5s2 2D5/2 level by electron collisions is found be be approximately 7*10-16 cm2 and the ratio of this cross section to that for excitation from the 5p 2P3/2 level is 10-3.",

author = "Browne, {P. G.} and Dunn, {M. H.}",

year = "1974",

doi = "10.1088/0022-3700/7/10/005",

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AU - Browne, P. G.

AU - Dunn, M. H.

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N2 - Chopping the radiation field in the cavity of a helium-cadmium laser operating at 4416 AA induces perturbations in the populations of the 5s 2 2D3/2,5/2 and 5p 2P3/2 levels of Cd II. Analysis of the perturbations of the 5p 2P 3/2 and 5s2 2D5/2 populations shows that the ratio of non-radiative to radiative de-excitation rates for the upper laser level is 0.9+or-0.2, approximately independent of discharge conditions. From the population changes of the 5s2 2D3/2 level the cross section for excitation from the 5s2 2D5/2 level by electron collisions is found be be approximately 7*10-16 cm2 and the ratio of this cross section to that for excitation from the 5p 2P3/2 level is 10-3.

AB - Chopping the radiation field in the cavity of a helium-cadmium laser operating at 4416 AA induces perturbations in the populations of the 5s 2 2D3/2,5/2 and 5p 2P3/2 levels of Cd II. Analysis of the perturbations of the 5p 2P 3/2 and 5s2 2D5/2 populations shows that the ratio of non-radiative to radiative de-excitation rates for the upper laser level is 0.9+or-0.2, approximately independent of discharge conditions. From the population changes of the 5s2 2D3/2 level the cross section for excitation from the 5s2 2D5/2 level by electron collisions is found be be approximately 7*10-16 cm2 and the ratio of this cross section to that for excitation from the 5p 2P3/2 level is 10-3.

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Perturbation spectroscopy of the He-Cd laser discharge

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