Physical Review Letters

Observation of rank-4 alignment in near-resonant charge transfer Na(4D)+ K+ → Na+ + K/emph>

H. Hülser, E. E. B. Campbell, R. Witte, H. Genger, I. V. Hertel

Published Jan 22, 1990• 18 citations

Abstract

Rank-4 alignment in near-resonant charge-transfer collisions has been observed for the first time. The general formula for describing the scattering intensity for cylindrical symmetry, in terms of multipole moments, from atoms excited by two parallel polarized lasers has been derived and used to evaluate the experimental results. A strong energy dependence of the relative charge-transfer cross section of the 4d\ensuremath{\sigma}, 4d\ensuremath{\pi}, and 4d\ensuremath{\delta} sublevels for the ${\mathrm{K}}^{+}$Na(4D)\ensuremath{\rightarrow}${\mathrm{K}}^{\mathrm{*}}$+${\mathrm{Na}}^{+}$ system has been found.

DOI: 10.1103/physrevlett.64.392

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Physical Review Letters

Observation of rank-4 alignment in near-resonant charge transfer Na(4D)+ K+ → Na+ + K/emph>

H. Hülser, E. E. B. Campbell, R. Witte, H. Genger, I. V. Hertel

Published Jan 22, 1990• 18 citations

Publisher

Abstract

{\mathrm{K}}^{+}

Na(4D)\ensuremath{\rightarrow}

{\mathrm{K}}^{\mathrm{*}}

{\mathrm{Na}}^{+}

system has been found.

DOI: 10.1103/physrevlett.64.392

Related papers

Near resonant charge transfer in Na(4D)+K+→Na+ + K*: optical pumping of the Na(4D) state and energy dependence of rank 4 alignment

E. E. B. Campbell, H. Hülser, R. Witte +1 more

Zeitschrift für Physik D Atoms Molecules and ClustersMar 1, 199025 citations

CROSS SECTION MEASUREMENT FOR THE ENERGY TRANSFER COLLISION Na(4D)+Na(3S)Na(4F)+Na(3S)

LI WAN-XING

We measured the cross section for the collision transfer process Na(4D)+Na (3S)Na(4F)+Na(3S). The 4D state was excited by two photon absorption using a tunable dye laser. Since the direct 4F→3D fluorescence can not be detected with our apparatus, we monitored instead the cascade 3D→3P and 4D→3P fluorescence. Relative intensity of the fluorescence, combined with the measurement of sodium density, yielded cross section σ_(4D)→(4F)=1.3×10~(-14)±28％(cm~2). Our result is compared to other experiments.We measured the cross section for the collision transfer process Na(4D)+Na (3S)Na(4F)+Na(3S). The 4D state was excited by two photon absorption using a tunable dye laser. Since the direct 4F→3D fluorescence can not be detected with our apparatus, we monitored instead the cascade 3D→3P and 4D→3P fluorescence. Relative intensity of the fluorescence, combined with the measurement of sodium density, yielded cross section σ_(4D)→(4F)=1.3×10~(-14)±28％(cm~2). Our result is compared to other experiments.

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Bulletin of the American Physical SocietyMay 1, 19930 citations

Relaxation of the sodium atom in the 4D level by collisions with noble gases. I. Experimental aspects

F. Biraben, K. Béroff, G. Grynberg +1 more

The sodium atom is excited selectively in the 4D3/2 or 4D 5/2 level using Doppler-free two-photon absorption. We analyse the fluorescence in intensity and polarization in presence of noble gas atoms. We measure the cross-sections corresponding to the transfer of population between 4D3/2 and 4D5/2 and between 4D and 4F, the relaxation of alignment in both fine sublevels and the transfer of alignment. In particular, we have observed a transfer of alignment in the case of helium and neon perturbers.The sodium atom is excited selectively in the 4D3/2 or 4D 5/2 level using Doppler-free two-photon absorption. We analyse the fluorescence in intensity and polarization in presence of noble gas atoms. We measure the cross-sections corresponding to the transfer of population between 4D3/2 and 4D5/2 and between 4D and 4F, the relaxation of alignment in both fine sublevels and the transfer of alignment. In particular, we have observed a transfer of alignment in the case of helium and neon perturbers.

Journal de physiqueJan 1, 197916 citations

Cross-section measurement for the energy-transfer collisions Na(3P)+Na(3P)→Na(5S,4D)+Na(3S)

M. Allegrini, Paola Bicchi, L. Moi

We report our measurements of the cross sections ${\ensuremath{\sigma}}_{5S}$ and ${\ensuremath{\sigma}}_{4D}$ for the electronic-energy-transfer process $\mathrm{Na}(3P)+\mathrm{Na}(3P)\ensuremath{\rightarrow}\mathrm{Na}(5S,4D)+\mathrm{Na}(3S)$. To obtain these cross sections we have measured the fluorescence intensity for the transitions $5S\ensuremath{\rightarrow}3P$, $4D\ensuremath{\rightarrow}3P$, and $3P\ensuremath{\rightarrow}3S$ in sodium vapor excited with a cw dye laser. The study of this electronic energy transfer is complicated and there is a large disagreement (\ensuremath{\gtrsim} ${10}^{4}$ ) among reported measurements. We believe we have avoided most of the difficulties of previous experiments. Our results are ${\ensuremath{\sigma}}_{5S}=(2.0\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{2}$ and ${\ensuremath{\sigma}}_{4D}=(3.2\ifmmode\pm\else\textpm\fi{}1.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{\ensuremath{-}2}$, and they are compared with the results of other experiments.We report our measurements of the cross sections ${\ensuremath{\sigma}}_{5S}$ and ${\ensuremath{\sigma}}_{4D}$ for the electronic-energy-transfer process $\mathrm{Na}(3P)+\mathrm{Na}(3P)\ensuremath{\rightarrow}\mathrm{Na}(5S,4D)+\mathrm{Na}(3S)$. To obtain these cross sections we have measured the fluorescence intensity for the transitions $5S\ensuremath{\rightarrow}3P$, $4D\ensuremath{\rightarrow}3P$, and $3P\ensuremath{\rightarrow}3S$ in sodium vapor excited with a cw dye laser. The study of this electronic energy transfer is complicated and there is a large disagreement (\ensuremath{\gtrsim}${10}^{4}$) among reported measurements. We believe we have avoided most of the difficulties of previous experiments. Our results are ${\ensuremath{\sigma}}_{5S}=(2.0\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{2}$ and ${\ensuremath{\sigma}}_{4D}=(3.2\ifmmode\pm\else\textpm\fi{}1.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{\ensuremath{-}2}$, and they are compared with the results of other experiments.

Physical Review ASep 1, 198359 citations

{\mathrm{K}}^{+}

Na(4D)\ensuremath{\rightarrow}

{\mathrm{K}}^{\mathrm{*}}

{\mathrm{Na}}^{+}

system has been found.

{10}^{4}

) among reported measurements. We believe we have avoided most of the difficulties of previous experiments. Our results are ${\ensuremath{\sigma}}_{5S}=(2.0\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$

{\mathrm{cm}}^{2}

and ${\ensuremath{\sigma}}_{4D}=(3.2\ifmmode\pm\else\textpm\fi{}1.1)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}15}$ ${\mathrm{cm}}^{\ensuremath{-}2}$, and they are compared with the results of other experiments.