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Zeitschrift für Physik D Atoms Molecules and Clusters

The collision cross sections for excitation energy transfer in Rb*(5P 3/2) + K(4S 1/2) → Rb(5S 1/2) + K*(4P J ) processes

Vlasta Horvatić, Cedomil Vadla, Mladen Movre

Published Jun 1, 1993• 8 citations
Publisher
DOI
10.1007/bf01426759

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Collision cross sections for excitation energy transfer in Na* (3P 1/2)+K(4S 1/2)⇔Na*(3P 3/2)+K(4S 1/2) processes

Vlasta Horvatić, D. Veža, Mladen Movre +2 more

Zeitschrift für Physik D Atoms Molecules and Clusters•Sep 1, 1995•6 citations

[Energy-pooling collisions of rubidium atoms: Rb (5P(J)) + Rb (5P(J))--> Rb (5S) + Rb (nl = 5D,7S)].

Baoxia Mu, Shuying Wang, Xiu-Hua Cui +4 more

An experimental study of rubidium energy pooling collisions, Rb(5P(J)) + Rb(5P(J))-->Rb(nlJ') + Rb(5S), at thermal energies, was carried out in a cell. Atoms were excited to either the 5P 1/2 or 5P 3/2 state using a single-mode diode laser. The excited atom density and spatial distribution were mapped by monitoring the absorption of a counter-propagating single-mode diode laser beam, tuned to either 5P 1/2-->5D 3/2 or 5P 3/2-->7S 1/2 transition, which could be translated parallel to the pump beam. The excited atom densities were combined with the measured fluorescence ratios to determine cross sections for the rubidium energy pooling process. For 5P 3/2 excitation the cross sections for nlJ' being 5D 5/2, 5D 3/2, and 7S 1/2 are (1.32+/-0.59) x 10(-14), (1.18+/-0.53) x 10(-14) and (3. 21+/-1. 44) x 10(-15) cm2, respectively. For 5P 1/2 excitation the cross sections for nlJ' being 5D 5/2 and 5D 3/2 are (6.57+/-2.96) x 10(-15), and (5.90+/-2.66) x 10(-15) cm2, respectively. The results were compared with those of other experiments.

•Sep 1, 2006•1 citation

Theoretical study of energy transfer in Rb(7S) + Rb(5S) and Rb(5D) + Rb(5S) collisions

K. Orlovsky, V. Grushevsky, Aigars Ekers

The European Physical Journal D•Sep 1, 2000•4 citations

Studies of inelastic cross-section in Rb(7S) + Rb(5S) collisions

Luo Caiyan, Aigars Ekers, Janis Klavins +1 more

The cross section σ = (8 ± 4) × 10 −15 cm 2 was determined for the Rb(7S) + Rb(5S) → Rb(5D) + Rb(5S) excitation energy transfer process, and the quenching cross section σ q = (2 ± 1) × 10 −14 cm 2 for the Rb(5D) state in collisions with ground state Rb atoms. Applying rubidium quasimolecular asymptotic potential curves at relatively large internuclear distances, a qualitative interpretation of the experimental results is presented. It is shown that the quenching of the Rb(5D) atoms in collisions may be explained by a reversed energy pooling process Rb(5D) + Rb(5S) → Rb(5P) + Rb(5P).

Physica Scripta•Mar 1, 1996•7 citations

Collisional Energy Transfer for Rb_2 in Excited State by Rb Atoms

Yifan Shen

At different Rb densities,Rb vapor was irradiated in a glass fluorescence cell with pulses of radiation from a pumped-laser,populating Rb 2 (B 1 Π u)state by single-photon absorption.Energy transfer in Rb 2 (B 1 Π u) + Rb(5S) collision is studied using methods of atomic and molecular fluorescence.The decay signal of time-resolved fluorescence from B 1 Π u → X 1 Σ + g transition was monitored.The effective lifetimes of the B 1 Π u state can be resolved.The plot of reciprocal of effective lifetimes of the B 1 Π u state against Rb densities yielded the slope that indicated the total cross section for deactivation and the intercept that provided the radiative lifetime of the state.The radiative lifetime 23.5ns for the B 1 Π u is obtained.The cross section for deactivation of the Rb 2 (B 1 Π u) molecules by collisions with Rb atoms is σ 3=(4.33 ± 0.14) × 10-15 cm 2.At the different Rb densities,the time-integrated intensities of the resulting Rb emission lines.I(5P 3/2 → 5S 1/2) and I(5P 1/2 → 5S 1/2) were measured.The absolute values for Rb 2 (B 1 Π u)+Rb→ Rb 2 (1 1 Σ + g) + Rb(5P J)collisional transfer cross sections have been obtained.The cross sections are σ 31=(2.86 ± 0.13) × 10-16 cm 2 (for transferring to 5P 1/2) and σ 32=(8.30 ± 0.38) × 10-16 cm 2 (for transferring to 5P 3/2),respectively.

Shinjang dashösi ilmiy jurnili•Jan 1, 2010•0 citations

Excitation Transfer in Rb(5D-7S)-He,Ar,H2 Collisions

张岩文 Zhang Yanwen, 万鸿飞 Wan Hongfei, 崔秀花 Cui Xiuhua +4 more

Chinese Journal of Lasers•Jan 1, 2009•0 citations
An experimental study of rubidium energy pooling collisions, Rb(5P(J)) + Rb(5P(J))-->Rb(nlJ') + Rb(5S), at thermal energies, was carried out in a cell. Atoms were excited to either the 5P 1/2 or 5P 3/2 state using a single-mode diode laser. The excited atom density and spatial distribution were mapped by monitoring the absorption of a counter-propagating single-mode diode laser beam, tuned to either 5P 1/2-->5D 3/2 or 5P 3/2-->7S 1/2 transition, which could be translated parallel to the pump beam. The excited atom densities were combined with the measured fluorescence ratios to determine cross sections for the rubidium energy pooling process. For 5P 3/2 excitation the cross sections for nlJ' being 5D 5/2, 5D 3/2, and 7S 1/2 are (1.32+/-0.59) x 10(-14), (1.18+/-0.53) x 10(-14) and (3. 21+/-1. 44) x 10(-15) cm2, respectively. For 5P 1/2 excitation the cross sections for nlJ' being 5D 5/2 and 5D 3/2 are (6.57+/-2.96) x 10(-15), and (5.90+/-2.66) x 10(-15) cm2, respectively. The results were compared with those of other experiments.
The cross section σ = (8 ± 4) × 10 −15 cm 2 was determined for the Rb(7S) + Rb(5S) → Rb(5D) + Rb(5S) excitation energy transfer process, and the quenching cross section σ q = (2 ± 1) × 10 −14 cm 2 for the Rb(5D) state in collisions with ground state Rb atoms. Applying rubidium quasimolecular asymptotic potential curves at relatively large internuclear distances, a qualitative interpretation of the experimental results is presented. It is shown that the quenching of the Rb(5D) atoms in collisions may be explained by a reversed energy pooling process Rb(5D) + Rb(5S) → Rb(5P) + Rb(5P).
At different Rb densities,Rb vapor was irradiated in a glass fluorescence cell with pulses of radiation from a pumped-laser,populating Rb 2 (B 1 Π u)state by single-photon absorption.Energy transfer in Rb 2 (B 1 Π u) + Rb(5S) collision is studied using methods of atomic and molecular fluorescence.The decay signal of time-resolved fluorescence from B 1 Π u → X 1 Σ + g transition was monitored.The effective lifetimes of the B 1 Π u state can be resolved.The plot of reciprocal of effective lifetimes of the B 1 Π u state against Rb densities yielded the slope that indicated the total cross section for deactivation and the intercept that provided the radiative lifetime of the state.The radiative lifetime 23.5ns for the B 1 Π u is obtained.The cross section for deactivation of the Rb 2 (B 1 Π u) molecules by collisions with Rb atoms is σ 3=(4.33 ± 0.14) × 10-15 cm 2.At the different Rb densities,the time-integrated intensities of the resulting Rb emission lines.I(5P 3/2 → 5S 1/2) and I(5P 1/2 → 5S 1/2) were measured.The absolute values for Rb 2 (B 1 Π u)+Rb→ Rb 2 (1 1 Σ + g) + Rb(5P J)collisional transfer cross sections have been obtained.The cross sections are σ 31=(2.86 ± 0.13) × 10-16 cm 2 (for transferring to 5P 1/2) and σ 32=(8.30 ± 0.38) × 10-16 cm 2 (for transferring to 5P 3/2),respectively.