Fluorescence monitoring of laser induced population changes of 6P and 6D levels in cesium vapor

Dimitri Pappas, Nathan C. Pixley, Benjamin W. Smith, James D. Winefordner

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4 Scopus citations

Abstract

Observations of enhancement and reduction of the fluorescence intensity in the continuous-wave excitation of Cs atomic vapor is reported. The reduction is due to a depopulation of the 62p3/2o state upon illumination of a Cs vapor cell with light corresponding to the 62P3/2o→62D5/2 transition (917.23 nm). Collisional relaxation of the 62D5/2 atoms to the 62D3/2 state, followed by radiative decay to the 62P1/2o state (876.14 nm), creates an increase in the population of the 62P1/2o state. The increase in the excited state population results in an increase in the fluorescence intensity of the 62P1/2o→62S1/2 transition (894.35 nm). These laser induced population changes, monitored by the decrease or increase of the corresponding fluorescence signals, were modeled using a simplified density matrix formalism, which allowed an order of magnitude estimate of the rates of level mixing between 62D states and 62P states.

Original languageEnglish
Pages (from-to)1503-1509
Number of pages7
JournalSpectrochimica acta, Part B: Atomic spectroscopy
Volume55
Issue number9
DOIs
StatePublished - Sep 1 2000

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