Optics Communications

Observation of sodium molecular formation induced by resonant laser atomic excitation and three-body collisions

Sergey Nikitich Atutov, V. Biancalana, Sven Brandt, R. Calabrese, Paolo Lenisa, E. Mariotti, L. Moi, K. A. Nasyrov, Anatolii M. Shalagin, R. Wynands

Published Sep 1, 1999• 1 citation

Publisher

DOI: 10.1016/s0030-4018(99)00365-x

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Optics Communications

Observation of sodium molecular formation induced by resonant laser atomic excitation and three-body collisions

Sergey Nikitich Atutov, V. Biancalana, Sven Brandt, R. Calabrese, Paolo Lenisa, E. Mariotti, L. Moi, K. A. Nasyrov, Anatolii M. Shalagin, R. Wynands

Published Sep 1, 1999• 1 citation

Publisher

DOI: 10.1016/s0030-4018(99)00365-x

Related papers

Formation of an alignment in collisions of laser excited sodium with xenon atoms

M. Elbel, Harry H�hnermann, Th. Meier +1 more

The European Physical Journal ADec 1, 197520 citations

Associative ionization in collisions between Na(3 P3/2 ) and Cs(6 P3/2 )

C. Gabbanini, M. Biagini, Silvia Gozzini +2 more

The results of an experiment on the associative ionization collision between sodium and cesium excited atoms are reported. The atoms are excited by two resonant cw lasers to the 3 ${\mathit{P}}_{3/2}$ and 6 ${\mathit{P}}_{3/2}$ levels, respectively, and the formation of the ${\mathrm{NaCs}}^{+}$ molecular ion is observed. The rate constant of such process has been measured relative to the known rate constant of sodium associative ionization and its value resulted in K=(5.4\ifmmode\pm\else\textpm\fi{}3.2)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}11}$ ${\mathrm{cm}}^{3}$ ${\mathrm{s}}^{\mathrm{\ensuremath{-}}1}$.The results of an experiment on the associative ionization collision between sodium and cesium excited atoms are reported. The atoms are excited by two resonant cw lasers to the 3${\mathit{P}}_{3/2}$ and 6${\mathit{P}}_{3/2}$ levels, respectively, and the formation of the ${\mathrm{NaCs}}^{+}$ molecular ion is observed. The rate constant of such process has been measured relative to the known rate constant of sodium associative ionization and its value resulted in K=(5.4\ifmmode\pm\else\textpm\fi{}3.2)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}11}$ ${\mathrm{cm}}^{3}$ ${\mathrm{s}}^{\mathrm{\ensuremath{-}}1}$.

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Charles E. Burkhardt, Ron Corey, W. P. Garver +3 more

Ion formation in sodium vapor (\ensuremath{\sim} ${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium, ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$ , and Na(3s) were observed. However, the predominant production mechanism was found to be photoionization of ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$ by blackbody radiation, the rate of which was measured at 500 K and found to be \ensuremath{\simeq}5.7\ifmmode\times\else\texttimes\fi{} ${10}^{3}$ ${\mathrm{sec}}^{\mathrm{\ensuremath{-}}1}$ for n=18, in good agreement with theory. The ${\mathrm{Na}}^{+}$ signal from blackbody photoionization is observed to be independent of n, which we interpret as implying rapid and nearly complete self-l-mixing, mixing by collisions with Na(3s) atoms, for both s and d states. It is probable, however, that the s states are mixed to the adjacent, n-1, manifold of l states. It was also found that the heavy-body collision cross sections for ${\mathrm{Na}}^{+}$ and ${\mathrm{Na}}_{2}$ ${\mathrm{}}^{+}$ formation, while roughly three orders of magnitude lower than our estimate of the self-l-mixing cross section, are appreciable, of order 100 A ${\r{}}^{2}$ .Ion formation in sodium vapor (\ensuremath{\sim}${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium, ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$, and Na(3s) were observed. However, the predominant production mechanism was found to be photoionization of ${\mathrm{Na}}^{\mathrm{*}\mathrm{*}}$ by blackbody radiation, the rate of which was measured at 500 K and found to be \ensuremath{\simeq}5.7\ifmmode\times\else\texttimes\fi{}${10}^{3}$ ${\mathrm{sec}}^{\mathrm{\ensuremath{-}}1}$ for n=18, in good agreement with theory. The ${\mathrm{Na}}^{+}$ signal from blackbody photoionization is observed to be independent of n, which we interpret as implying rapid and nearly complete self-l-mixing, mixing by collisions with Na(3s) atoms, for both s and d states. It is probable, however, that the s states are mixed to the adjacent, n-1, manifold of l states. It was also found that the heavy-body collision cross sections for ${\mathrm{Na}}^{+}$ and ${\mathrm{Na}}_{2}$${\mathrm{}}^{+}$ formation, while roughly three orders of magnitude lower than our estimate of the self-l-mixing cross section, are appreciable, of order 100 A${\r{}}^{2}$.

Physical Review AJul 1, 198628 citations

Cooling of sodium atoms by resonant laser emission

V. I. Balykin, Vladilen S Letokhov, V.I. Mishin

Journal of Experimental and Theoretical PhysicsApr 1, 19805 citations

Three-body collisions between laser-excited Na and K atoms in the presence of buffer gas

S. A. Abdullah, M. Allegrini, Silvia Gozzini +1 more

Il Nuovo Cimento DDec 1, 198711 citations

The results of an experiment on the associative ionization collision between sodium and cesium excited atoms are reported. The atoms are excited by two resonant cw lasers to the 3

{\mathit{P}}_{3/2}

and 6

{\mathit{P}}_{3/2}

levels, respectively, and the formation of the

{\mathrm{NaCs}}^{+}

molecular ion is observed. The rate constant of such process has been measured relative to the known rate constant of sodium associative ionization and its value resulted in K=(5.4\ifmmode\pm\else\textpm\fi{}3.2)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}11}$

{\mathrm{cm}}^{3}

${\mathrm{s}}^{\mathrm{\ensuremath{-}}1}$.

Ion formation in sodium vapor (\ensuremath{\sim}

{10}^{11}

${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) containing Rydberg atoms (18\ensuremath{\le}n\ensuremath{\le}35) was investigated. Both atomic ions and diatomic molecular ions resulting from collisions between highly excited sodium,

{\mathrm{Na}}^{\mathrm{*}\mathrm{*}}

, and Na(3s) were observed. However, the predominant production mechanism was found to be photoionization of

{\mathrm{Na}}^{\mathrm{*}\mathrm{*}}

by blackbody radiation, the rate of which was measured at 500 K and found to be \ensuremath{\simeq}5.7\ifmmode\times\else\texttimes\fi{}

{10}^{3}

${\mathrm{sec}}^{\mathrm{\ensuremath{-}}1}$ for n=18, in good agreement with theory. The

{\mathrm{Na}}^{+}

signal from blackbody photoionization is observed to be independent of n, which we interpret as implying rapid and nearly complete self-l-mixing, mixing by collisions with Na(3s) atoms, for both s and d states. It is probable, however, that the s states are mixed to the adjacent, n-1, manifold of l states. It was also found that the heavy-body collision cross sections for

{\mathrm{Na}}^{+}

and

{\mathrm{Na}}_{2}

{\mathrm{}}^{+}

formation, while roughly three orders of magnitude lower than our estimate of the self-l-mixing cross section, are appreciable, of order 100 A

{\r{}}^{2}