We have experimentally investigated the density behavior of the depolarized-interaction-induced light-scattering line shape of compressed gaseous argon at T=298 K and up to pressure p=262 MPa, i.e., to densities n=19.7 atoms/ ${\mathrm{nm}}^{3}$ . We have been able to measure the spectral behavior down to the frequency \ensuremath{\nu}\ensuremath{\approxeq}15 GHz. These low-frequency measurements have permitted the study in detail of the effect of the intensity cancellation which, in the line shape, manifests itself by means of a strong density-dependent rounding of the spectra below \ensuremath{\approxeq}900 GHz.We have experimentally investigated the density behavior of the depolarized-interaction-induced light-scattering line shape of compressed gaseous argon at T=298 K and up to pressure p=262 MPa, i.e., to densities n=19.7 atoms/${\mathrm{nm}}^{3}$. We have been able to measure the spectral behavior down to the frequency \ensuremath{\nu}\ensuremath{\approxeq}15 GHz. These low-frequency measurements have permitted the study in detail of the effect of the intensity cancellation which, in the line shape, manifests itself by means of a strong density-dependent rounding of the spectra below \ensuremath{\approxeq}900 GHz.

Physical Review AOct 1, 19923 citations

Isotropic collision-induced scattering from high-temperature gaseous mercury

Marco Sampoli, F. Hensel, F. Barocchi

We have measured the isotropic collision-induced light-scattering spectrum of a metal vapor, i.e., mercury vapor at temperature T=973 K and densities around 0.113 atom/ ${\mathrm{nm}}^{3}$ , by means of an apparatus which allows us to perform comparisons between polarized and depolarized Raman spectra in high-temperature high-pressure gases and metal vapors. We have then derived an empirical model for the collision-induced polarizability trace of mercury diatom. Similarly to the anisotropy, the obtained trace behaves rather differently from the noble-gas counterpart, showing strong contributions from the electron correlations in the overlap region. \textcopyright{} 1996 The American Physical Society.We have measured the isotropic collision-induced light-scattering spectrum of a metal vapor, i.e., mercury vapor at temperature T=973 K and densities around 0.113 atom/${\mathrm{nm}}^{3}$, by means of an apparatus which allows us to perform comparisons between polarized and depolarized Raman spectra in high-temperature high-pressure gases and metal vapors. We have then derived an empirical model for the collision-induced polarizability trace of mercury diatom. Similarly to the anisotropy, the obtained trace behaves rather differently from the noble-gas counterpart, showing strong contributions from the electron correlations in the overlap region. \textcopyright{} 1996 The American Physical Society.

Physical Review AJun 1, 199612 citations

Light scattering from a dense and ultracold atomic gas

Dmitriy V. Kupriyanov, Igor V. Sokolov, Mark D. Havey

Bulletin of the American Physical SocietyMay 22, 20090 citations

Resonant scattering of monochromatic light in gases

David L. Huber

IEEE Journal of Quantum ElectronicsMay 1, 19680 citations

Spectral anomalies of the effect of light-induced drift of caesium atoms caused by the velocity dependence of transport collision frequencies

А. И. Пархоменко, Anatolii M. Shalagin

The spectral features of the light-induced drift (LID) velocity of caesium atoms in inert buffer gases are studied theoretically. A strong temperature dependence of the spectral LID line shape of Cs atoms in Ar or Kr atmosphere in the vicinity of T ~ 1000 K is predicted. It is shown that the anomalous LID of Cs atoms in binary buffer mixtures of two different inert gases can be observed at virtually any (including ambient) temperature, depending on the content of the components in these mixtures. The results obtained make it possible to precisely test the interatomic interaction potentials in the experiments on the anomalous LID.The spectral features of the light-induced drift (LID) velocity of caesium atoms in inert buffer gases are studied theoretically. A strong temperature dependence of the spectral LID line shape of Cs atoms in Ar or Kr atmosphere in the vicinity of T ~ 1000 K is predicted. It is shown that the anomalous LID of Cs atoms in binary buffer mixtures of two different inert gases can be observed at virtually any (including ambient) temperature, depending on the content of the components in these mixtures. The results obtained make it possible to precisely test the interatomic interaction potentials in the experiments on the anomalous LID.

Quantum ElectronicsOct 29, 20145 citations

{\mathrm{nm}}^{3}

. We have been able to measure the spectral behavior down to the frequency \ensuremath{\nu}\ensuremath{\approxeq}15 GHz. These low-frequency measurements have permitted the study in detail of the effect of the intensity cancellation which, in the line shape, manifests itself by means of a strong density-dependent rounding of the spectra below \ensuremath{\approxeq}900 GHz.

We have measured the isotropic collision-induced light-scattering spectrum of a metal vapor, i.e., mercury vapor at temperature T=973 K and densities around 0.113 atom/

{\mathrm{nm}}^{3}

, by means of an apparatus which allows us to perform comparisons between polarized and depolarized Raman spectra in high-temperature high-pressure gases and metal vapors. We have then derived an empirical model for the collision-induced polarizability trace of mercury diatom. Similarly to the anisotropy, the obtained trace behaves rather differently from the noble-gas counterpart, showing strong contributions from the electron correlations in the overlap region. \textcopyright{} 1996 The American Physical Society.