Stimulated Raman Scattering In Kxe: A Novel Spectroscopic Tool

Desai, Kavita V.

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https://hdl.handle.net/2142/116522 Copy

Description

Title

Stimulated Raman Scattering In Kxe: A Novel Spectroscopic Tool

Author(s)

Desai, Kavita V.

Contributor(s)

• Eden, J. Gary
• Mironov, Andrey E.

Issue Date

2022-06-24

Keyword(s)

Spectroscopy as an analytical tool

Abstract

Stimulated Raman Scattering (SRS) has been observed for the first time in any alkali-rare gas diatomic molecule, and the observed spectra provide a powerful tool for elucidating interatomic spectra. Specifically, laser pump-probe experiments in which the K vapor/Xe mixtures are excited with a narrowband dye laser radiation near the K D$_2$ line yields strong amplification of a probe pulse located 50-55~cm$^{-1}$ to the red of the K D$_1$ line, a difference that is close, but not equal to the 4$^{2}$P$_{3/2}$-4$^2$P$_{1/2}$ spin-orbit splitting of K. \begin{wrapfigure}{r}{0pt} \includegraphics[scale=0.3]{PumpProbe.eps} \end{wrapfigure} As shown by the representative data in the figure, sweeping the pump wavelength to the red, results in the SRS gain spectra spectrum (shown by the probe amplification spectra), tracking the movement of the pump. We interpret these data in terms of a molecular SRS process in which the Raman shift is associated with the KXe B$^2\Sigma^+_{1/2}$, A$^2\Pi_{3/2}$, A$^2\Pi_{1/2}$-X$^2\Sigma^+_{1/2}$ difference potentials at differing values of the internuclear R. Another unique aspect of this aspect of this process is that the Raman process originates with the K-Xe collision pairs in the thermal continuum of the ground state. Consequently, B$^2\Sigma^+_{1/2}$, A$^2\Pi_{3/2}$, A$^2\Pi_{1/2}$ interatomic potentials at large R can be determined by comparing experiment with calculations of B$^2\Sigma^+_{1/2}$, A$^2\Pi_{3/2}$, A$^2\Pi_{1/2}$-X$^2\Sigma^+_{1/2}$ Frank-Condon integrals and quasistatic line-broadening theory.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116522

DOI

https://doi.org/10.15278/isms.2022.FF08

Copyright and License Information

Copyright 2022 held by the authors

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