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INELASTIC COLLISIONS OF SLOW ATOMS

Борис М. Смирнов

Oct 1, 19640 citations

Coherence studies of atomic collisions

R. Hippler

Springer eBooksApr 7, 20080 citations

EXCITATION ENERGY TRANSFER BY COLLISIONS BETWEEN EXCITED RUBIDIUM ATOMS

Jin Wang, Zhengfa Hu, Deng-Yu Zhang +2 more

This paper reports the experimental observation of the excitation energy transfer to higher states by collisions between two rubidium atoms excited to a specific state by a CW single mode laser. An obvious competition has been observed between the channel of transition to the ground state by spontaneous emission, and that to higher excited states by collisions of two excited atoms. Formation rates of the high excited states with different laser power, atomic vapor temperature and laser detuning have been measured. A proposed mechanism well explained the experimental result.This paper reports the experimental observation of the excitation energy transfer to higher states by collisions between two rubidium atoms excited to a specific state by a CW single mode laser. An obvious competition has been observed between the channel of transition to the ground state by spontaneous emission, and that to higher excited states by collisions of two excited atoms. Formation rates of the high excited states with different laser power, atomic vapor temperature and laser detuning have been measured. A proposed mechanism well explained the experimental result.

Acta Physica SinicaJan 1, 19981 citation

Collisions of Highly Excited Atoms

R. F. Stebbings

Advances in atomic and molecular physicsJan 1, 19798 citations

POLARISATION EFFECTS IN ENERGY-TRANSFER COLLISIONS BETWEEN LASER-EXCITED ATOMS

Gerard Nienhuis

Nous étudions l'équation pilote généralisée pour la matrice densité d'un atome à deux niveaux dégénérés dans un champ laser ayant une polarisation arbitraire. Cette étude est utilisée pour l'analyse des collisions de transfert d'énergie entre deux atomes excités par laser, en termes des taux collisionnels pour les sous-états magnétiques. Les résultats sont appliqués à nos récentes mesures de l'ionisation associative entre deux atomes Na(3P) excités et polarisés par laser.Nous étudions l'équation pilote généralisée pour la matrice densité d'un atome à deux niveaux dégénérés dans un champ laser ayant une polarisation arbitraire. Cette étude est utilisée pour l'analyse des collisions de transfert d'énergie entre deux atomes excités par laser, en termes des taux collisionnels pour les sous-états magnétiques. Les résultats sont appliqués à nos récentes mesures de l'ionisation associative entre deux atomes Na(3P) excités et polarisés par laser.

Le Journal de Physique ColloquesJan 1, 19855 citations

ENERGY TRANSFER IN COLLISIONS BETWEEN TWO EXCITED CESIUM ATOMS

SHEN YI-FAN, LI WAN-XING, 新疆大学物理系,乌鲁木齐830046

Cesium molecules are pumped by a CW dye laser. Some of the excited molecules then pre-dissociate or collisionally transfer excitation to produce excited atoms at the 5D and 6P levels. The cross sections (in units of 10-14cm2) for the excitation transfer process Cs(6P)+Cs(5D) →Cs(7DJ)+Cs(6S)for J being 5/2 and 3/2 are 5. 4 ± 50% and 4. 9 ± 50%, respectively. The cross sections (in units of 10-14cm2) for the excitation transfer out of the 7D doublet [i. e. , Cs(7DJ)+Cs(6S) →states other than Cs(7D)] for J being 5/2 and 3/2 are 1. 6 ±50% and 0. 34±50%, respectively. To obtain these cross sections, the intensities of 7D and 5D fluorescence emissions and the 6P atom density are measured by using the absorption equivalent width technique. The results are discussed in eomparison with those of other experiments.Cesium molecules are pumped by a CW dye laser. Some of the excited molecules then pre-dissociate or collisionally transfer excitation to produce excited atoms at the 5D and 6P levels. The cross sections (in units of 10-14cm2) for the excitation transfer process Cs(6P)+Cs(5D) →Cs(7DJ)+Cs(6S)for J being 5/2 and 3/2 are 5. 4 ± 50% and 4. 9 ± 50%, respectively. The cross sections (in units of 10-14cm2) for the excitation transfer out of the 7D doublet [i. e. , Cs(7DJ)+Cs(6S) →states other than Cs(7D)] for J being 5/2 and 3/2 are 1. 6 ±50% and 0. 34±50%, respectively. To obtain these cross sections, the intensities of 7D and 5D fluorescence emissions and the 6P atom density are measured by using the absorption equivalent width technique. The results are discussed in eomparison with those of other experiments.

Acta Physica SinicaJan 1, 19931 citation

COHERENCE RELAXATION OF EXCITED ATOMS IN COLLISIONS

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