Journal de Physique Lettres

Study of Hg* (63 p1)-noble gas collisions in a 200 kG field range

J. C. Gay, A. Omont

Published Jan 1, 1976• 8 citations

Abstract

The study of Hg* (6 3P1)-rare gas collisions in a 200 kG range of magnetic field is reported. The results show that the collisional transfer rates between the m = 0 and the m = ± 1 Zeeman sublevels of an even isotope of mercury exhibit a strikingly different dependence on the field strength according to the noble gas species. A very qualitative attempt at interpretation is given using the results of a previous theoretical model which predicts a strong anisotropy of the relaxation process when the vapour is submitted to such magnetic fields.

DOI: 10.1051/jphyslet:0197600370406900

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Journal de Physique Lettres

Study of Hg* (63 p1)-noble gas collisions in a 200 kG field range

J. C. Gay, A. Omont

Published Jan 1, 1976• 8 citations

Publisher

Abstract

DOI: 10.1051/jphyslet:0197600370406900

Related papers

Collisional excitation transfer in high magnetic fields. II. Correlation function of the interaction in H(6P13)−Hg(6S01) collisions

J. C. Gay, Werner B. Schneider

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Physical Review ASep 1, 19799 citations

Quasi resonant collisional excitation transfer between Zeeman sublevels in high magnetic fields

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Magnetic field dependence of cross sections for collisional disorientation of 6 $sup 2$ P $sub 1$ / $sub 2$ cesium atomsMagnetic field dependence of cross sections for collisional disorientation of 6 $sup 2$P$sub 1$/$sub 2$ cesium atoms

J. Guiry, L. Krause

The magnetic field dependence of the cross sections for the disorientation of 6 $sup 2$ P $sub 1$ / $sub 2$ cesium atoms, induced in Cs-He collisions, has been studied using Zeeman scanning techniques. A Cs-He mixture, contained in a fluorescence cell which was located in a magnetic field variable from 0 to 10 kG, was irradiated with the circularly polarized 8943-A component of cesium resonance radiation in a direction parallel to the field, and the polarization of the resonance fluorescence was monitored in the backward direction in relation to the helium pressure and to the magnetic field strength. The cross sections, which are in good agreement with the results obtained previously at high and low magnetic fields, exhibit a variation with the magnetic field, which is in accordance with theoretical predictions. (AIP)The magnetic field dependence of the cross sections for the disorientation of 6 $sup 2$P$sub 1$/$sub 2$ cesium atoms, induced in Cs-He collisions, has been studied using Zeeman scanning techniques. A Cs-He mixture, contained in a fluorescence cell which was located in a magnetic field variable from 0 to 10 kG, was irradiated with the circularly polarized 8943-A component of cesium resonance radiation in a direction parallel to the field, and the polarization of the resonance fluorescence was monitored in the backward direction in relation to the helium pressure and to the magnetic field strength. The cross sections, which are in good agreement with the results obtained previously at high and low magnetic fields, exhibit a variation with the magnetic field, which is in accordance with theoretical predictions. (AIP)

Physical Review ADec 1, 19750 citations

The authors report results of the experimental study of excitation transfer between Zeeman sublevels of the

6^{3}P_{1}

state of an even isotope of mercury in magnetic fields up to 80 kG, obtained by monitoring the transition from sudden to partially adiabatic collisions. The results are shown to be in good agreement with theoretical evaluations based on a numerical solution of the relaxation problem or on a correlation-function description using a ${R}^{\ensuremath{-}3}$ dipole-dipole interaction.

An experimental study of excitation transfer between certain Zeeman sublevels of the

3^{2}P_{J}

states in strong magnetic fields is reported for $\mathrm{Na}(3^{2}S_{\frac{1}{2}})\ensuremath{-}{\mathrm{Na}}^{*}(3^{2}P_{J})$ resonant collisions. A major decrease in the $M=\ensuremath{-}\frac{3}{2}\ensuremath{\rightarrow}M=\frac{3}{2}$ transfer rate is observed between 4 and 80 kG. Approximate calculations in the correlation-function framework are performed, and the experimental results and theoretical predictions for the field dependence are in good agreement. Some insights into the mechanisms of the collision process are deduced and the particularly important role of the electronic spin is emphasized. The importance of the symmetry properties of the interaction potential is also directly demonstrated.

Magnetic field dependence of cross sections for collisional disorientation of 6

sup 2

sub 1

sub 2

cesium atoms

The magnetic field dependence of the cross sections for the disorientation of 6

sup 2

sub 1

sub 2

cesium atoms, induced in Cs-He collisions, has been studied using Zeeman scanning techniques. A Cs-He mixture, contained in a fluorescence cell which was located in a magnetic field variable from 0 to 10 kG, was irradiated with the circularly polarized 8943-A component of cesium resonance radiation in a direction parallel to the field, and the polarization of the resonance fluorescence was monitored in the backward direction in relation to the helium pressure and to the magnetic field strength. The cross sections, which are in good agreement with the results obtained previously at high and low magnetic fields, exhibit a variation with the magnetic field, which is in accordance with theoretical predictions. (AIP)