Optics and Spectroscopy

Interaction potentials of Yb(6s6p 1,3 P J ) with He and Ne: Collisional depolarization of Yb(6s6p) excited atoms in lighter noble gases

A. L. Zagrebin, M. G. Lednev

Published Mar 1, 1992• 1 citation

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Optics and Spectroscopy

Interaction potentials of Yb(6s6p 1,3 P J ) with He and Ne: Collisional depolarization of Yb(6s6p) excited atoms in lighter noble gases

A. L. Zagrebin, M. G. Lednev

Published Mar 1, 1992• 1 citation

OpenAlex

Related papers

Interaction of the excited atoms Ne(2p 5 4p), Ar(3p 5 4p), and Kr(4p 5 5p) with He and Ne atoms: collisional depolarization processes

A. L. Zagrebin, M. G. Lednev

Optics and SpectroscopyDec 1, 19901 citation

Collisional depolarization of excited114Cd 5s5p 3 P 1 atoms by collisions with molecular gases

H. Kaupp, H. -P. Didra, C. Kramer +1 more

Zeitschrift für Physik D Atoms Molecules and ClustersDec 1, 19933 citations

Depolarization in 2 P 1/2 State of Excited Alkali Atoms Induced by Collisions with Noble Gas Atoms

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Hg(6 1,3 P), Hg(7 1,3 S)-He, Ne interaction potentials. Radiative decay of the metastable Hg(6 3 P 2 ) state and depolarization of excited Hg(6 1,3 P J ) atoms during collisions with He and Ne atoms

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Stimulated photon echo for angular analysis of elastic and depolarizing Yb/emph>– noble-gas collisions

J. Keller, J.-L. Le Gouët

Elastic and depolarizing collisions between excited ytterbium atoms (6s6p ${}^{3}$ ${P}_{1}$ level) and noble gases (He, Ne, and Xe) are investigated using a stimulated-photon-echo technique. The method is sensitive to collisional velocity changes concerning both the total population ${\ensuremath{\rho}}^{0}$ and the alignment ${\ensuremath{\rho}}^{2}$ of the level. More specifically, it enables us to compare precisely the velocity changes associated with elastic scattering and with alignment-preserving scattering. This represents an improvement with regard to previous works. A detailed theoretical discussion of depolarizing collisions in laser spectroscopy is presented. A simplified density-matrix equation is derived under appropriate approximations. Stimulated photon-echo data for elastic scattering are interpreted within the limits of small-angle scattering in a long-range van der Waals potential; total elastic scattering cross sections are derived from comparison between experiment and calculation: ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{\mathrm{el}}$=220(20) A ${\r{}}^{2}$ , ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{\mathrm{el}}$=320(20) A ${\r{}}^{2}$ , ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{\mathrm{el}}$=1240(60) A ${\r{}}^{2}$ . Total rates for destruction of alignment are measured in an auxiliary standard photon-echo experiment; the corresponding cross sections are ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{(2)}$=94(3) A ${\r{}}^{2}$ , ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{(2)}$=123(7) A ${\r{}}^{2}$ , ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{(2)}$=300(20) A ${\r{}}^{2}$ . Stimulated photon-echo data for depolarizing collisions are successfully compared with a calculation that we develop starting from a long-range anisotropic model potential.Elastic and depolarizing collisions between excited ytterbium atoms (6s6p ${}^{3}$${P}_{1}$ level) and noble gases (He, Ne, and Xe) are investigated using a stimulated-photon-echo technique. The method is sensitive to collisional velocity changes concerning both the total population ${\ensuremath{\rho}}^{0}$ and the alignment ${\ensuremath{\rho}}^{2}$ of the level. More specifically, it enables us to compare precisely the velocity changes associated with elastic scattering and with alignment-preserving scattering. This represents an improvement with regard to previous works. A detailed theoretical discussion of depolarizing collisions in laser spectroscopy is presented. A simplified density-matrix equation is derived under appropriate approximations. Stimulated photon-echo data for elastic scattering are interpreted within the limits of small-angle scattering in a long-range van der Waals potential; total elastic scattering cross sections are derived from comparison between experiment and calculation: ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{\mathrm{el}}$=220(20) A${\r{}}^{2}$, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{\mathrm{el}}$=320(20) A${\r{}}^{2}$, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{\mathrm{el}}$=1240(60) A${\r{}}^{2}$. Total rates for destruction of alignment are measured in an auxiliary standard photon-echo experiment; the corresponding cross sections are ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{(2)}$=94(3) A${\r{}}^{2}$, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{(2)}$=123(7) A${\r{}}^{2}$, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{(2)}$=300(20) A${\r{}}^{2}$. Stimulated photon-echo data for depolarizing collisions are successfully compared with a calculation that we develop starting from a long-range anisotropic model potential.

Physical Review ASep 1, 198522 citations

Potentials of the Zn(4 1,3 P J )-He and Cd(5 1,3 P J )-He interactions and processes of collisional depolarization

A. L. Zagrebin, M. G. Lednev

OptSpNov 1, 19930 citations

Elastic and depolarizing collisions between excited ytterbium atoms (6s6p

{}^{3}

{P}_{1}

level) and noble gases (He, Ne, and Xe) are investigated using a stimulated-photon-echo technique. The method is sensitive to collisional velocity changes concerning both the total population ${\ensuremath{\rho}}^{0}$ and the alignment ${\ensuremath{\rho}}^{2}$ of the level. More specifically, it enables us to compare precisely the velocity changes associated with elastic scattering and with alignment-preserving scattering. This represents an improvement with regard to previous works. A detailed theoretical discussion of depolarizing collisions in laser spectroscopy is presented. A simplified density-matrix equation is derived under appropriate approximations. Stimulated photon-echo data for elastic scattering are interpreted within the limits of small-angle scattering in a long-range van der Waals potential; total elastic scattering cross sections are derived from comparison between experiment and calculation: ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{\mathrm{el}}$=220(20) A

{\r{}}^{2}

, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{\mathrm{el}}$=320(20) A

{\r{}}^{2}

, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{\mathrm{el}}$=1240(60) A

{\r{}}^{2}

. Total rates for destruction of alignment are measured in an auxiliary standard photon-echo experiment; the corresponding cross sections are ${\mathit{\ensuremath{\sigma}}}_{\mathrm{He}}^{(2)}$=94(3) A

{\r{}}^{2}

, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Ne}}^{(2)}$=123(7) A

{\r{}}^{2}

, ${\mathit{\ensuremath{\sigma}}}_{\mathrm{Xe}}^{(2)}$=300(20) A

{\r{}}^{2}

. Stimulated photon-echo data for depolarizing collisions are successfully compared with a calculation that we develop starting from a long-range anisotropic model potential.