Bulletin of the American Physical Society

Depolarization of Ne*(2p$_{i}$ [J=1]) atoms induced by collisions with He(1s$^{2}$) at 10 K $<$ T $<$ 3,000 K

Cristian Bahrim, Vaibhav V. Khadilkar

Published Mar 10, 2008• 0 citations

OpenAlex

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Bulletin of the American Physical Society

Depolarization of Ne(2p $_{i}$ [J=1]) atoms induced by collisions with He(1s $^{2}$ ) at 10 K $<$ T $<$ 3,000 KDepolarization of Ne(2p$_{i}$ [J=1]) atoms induced by collisions with He(1s$^{2}$) at 10 K $<$ T $<$ 3,000 K

Cristian Bahrim, Vaibhav V. Khadilkar

Published Mar 10, 2008• 0 citations

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Alignment relaxation and disorientation of Ne*(2p $_{i}$ ) atoms induced by collisions with He(1s $^{2}$ )Alignment relaxation and disorientation of Ne*(2p$_{i}$) atoms induced by collisions with He(1s$^{2}$)

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The cross sections for the decay of circular and of linear polarization in oriented $4^{2}P_{\frac{3}{2}}$ potassium atoms, induced in collision with inert-gas atoms, were determined in a series of fluorescence experiments. A modified Zeeman scanning method was used to populate selectively the ${m}_{J}$ sublevels of the $^{2}P_{\frac{3}{2}}$ potassium atoms mixed with inert gases and placed in a strong magnetic field. Measurements of depolarization of the fluorescence, in relation to gas pressures, yielded the following depolarization cross sections: ${\ensuremath{\sigma}}_{1}$ (disorientation): K-He, 86 ${\mathrm{\AA{}}}^{2}$ ; K-Ne, 86 ${\mathrm{\AA{}}}^{2}$ ; K-Ar, 164 ${\mathrm{\AA{}}}^{2}$ ; K-Kr, 248 ${\mathrm{\AA{}}}^{2}$ ; K-Xe, 251 \AA{}. ${\ensuremath{\sigma}}_{2}$ (disalignment): K-He, 127 \AA{}; K-Ne, 120 ${\mathrm{\AA{}}}^{2}$ ; K-Ar, 240 ${\mathrm{\AA{}}}^{2}$ , K-Kr, 301 ${\mathrm{\AA{}}}^{2}$ , K-Xe, 336 ${\mathrm{\AA{}}}^{2}$ . The experimental values are in satisfactory agreement with the calculations of Nikitin and Ovchinnikova.The cross sections for the decay of circular and of linear polarization in oriented $4^{2}P_{\frac{3}{2}}$ potassium atoms, induced in collision with inert-gas atoms, were determined in a series of fluorescence experiments. A modified Zeeman scanning method was used to populate selectively the ${m}_{J}$ sublevels of the $^{2}P_{\frac{3}{2}}$ potassium atoms mixed with inert gases and placed in a strong magnetic field. Measurements of depolarization of the fluorescence, in relation to gas pressures, yielded the following depolarization cross sections: ${\ensuremath{\sigma}}_{1}$ (disorientation): K-He, 86 ${\mathrm{\AA{}}}^{2}$; K-Ne, 86 ${\mathrm{\AA{}}}^{2}$; K-Ar, 164 ${\mathrm{\AA{}}}^{2}$; K-Kr, 248 ${\mathrm{\AA{}}}^{2}$; K-Xe, 251 \AA{}. ${\ensuremath{\sigma}}_{2}$ (disalignment): K-He, 127 \AA{}; K-Ne, 120 ${\mathrm{\AA{}}}^{2}$; K-Ar, 240 ${\mathrm{\AA{}}}^{2}$, K-Kr, 301 ${\mathrm{\AA{}}}^{2}$, K-Xe, 336 ${\mathrm{\AA{}}}^{2}$. The experimental values are in satisfactory agreement with the calculations of Nikitin and Ovchinnikova.

Physical Review ASep 1, 197124 citations

Depolarization of Ne*(2p

_{i}

[J=1]) atoms induced by collisions with He(1s

^{2}

) at 10 K

<

<

3,000 K

Alignment relaxation and disorientation of Ne*(2p

_{i}

) atoms induced by collisions with He(1s

^{2}

)

The cross sections for the decay of circular and of linear polarization in oriented

4^{2}P_{\frac{3}{2}}

potassium atoms, induced in collision with inert-gas atoms, were determined in a series of fluorescence experiments. A modified Zeeman scanning method was used to populate selectively the

{m}_{J}

sublevels of the

^{2}P_{\frac{3}{2}}

potassium atoms mixed with inert gases and placed in a strong magnetic field. Measurements of depolarization of the fluorescence, in relation to gas pressures, yielded the following depolarization cross sections: ${\ensuremath{\sigma}}_{1}$ (disorientation): K-He, 86

{\mathrm{\AA{}}}^{2}

; K-Ne, 86

{\mathrm{\AA{}}}^{2}

; K-Ar, 164

{\mathrm{\AA{}}}^{2}

; K-Kr, 248

{\mathrm{\AA{}}}^{2}

; K-Xe, 251 \AA{}. ${\ensuremath{\sigma}}_{2}$ (disalignment): K-He, 127 \AA{}; K-Ne, 120

{\mathrm{\AA{}}}^{2}

; K-Ar, 240

{\mathrm{\AA{}}}^{2}

, K-Kr, 301

{\mathrm{\AA{}}}^{2}

, K-Xe, 336

{\mathrm{\AA{}}}^{2}

. The experimental values are in satisfactory agreement with the calculations of Nikitin and Ovchinnikova.