Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physica Scripta

A study of inelastic collisions Rb(7S) + Rb(5S). Theoretical aspects

V. Grushevsky, Mārtiņš Jansons, K. Orlovsky

Published Sep 1, 1997• 4 citations
Publisher

Abstract

The mechanisms of nonresonant excitation transfer process in thermal collisions of two rubidium atoms Rb(7S) + Rb(5S) → Rb(5D) + Rb(5S) was studied theoretically, under conditions when the initial and final states of a system of two colliding atoms are not connected with each other by electric multipole transitions. Population processes of Rb 5D states were considered using calculated adiabatic potential curves of the Rb 2 quasimolecule in asymptotic approximation. The calculated cross-sections (σ theor = 5.0 × 10 −15 cm 2 ) are in good agreement with experimental results [σ exp = (8.0 ± 4.0) × 10 −15 cm 2 ] at thermal collision energies ( T ∼ 500 K).

DOI
10.1088/0031-8949/56/3/004

Related papers

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

Energy transfer in Rb(5~2D_J,7S)+Rb(5S) collisions

Yifan Shen

Rb vapor was irradiated in a glass fluorescence cell with pulses of radiation from a YAG laserpumped OPO laser,populating 5D_j(or 7S) state by two-photon absorption.Energy transfer in Rb (5D_J,7S)+Rb(5S) collision is studied using methods of atomic fluorescence.The resulting fluorescence includes a direct component emitted in the optically excited state decay and a sensitized component arsing. from the collisional populated state.At the different densities of the components,fitting a three-state rate equation model,the cross sectionσ=(3.7±0.9)×10~(-14) cm~2 was obtained for Rb(5D_(5/2))→Rb(5D_(3/2)) transfer.The cross section for excitation transfer out of the 5D_J doublet are(3.1±1.2)×10~(-14) cm~2(for J = 5/2) and(2.0±0.6)×10~(-14) cm~2(for J = 3/2),respectively.The energy transfer cross section for the Rb(5D)→Rb(7S) is small,(1.6±0.4)×10~(-16) cm~2.The 5D_J state is quenched mainly in the reverse energy pooling processes,i.e.Rb(5D_J)+Rb(5S)→Rb(5P)+ Rb(5P).

Chinese Journal of Quantum Electronics•Jan 1, 2009•0 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

Energy pooling process in rubidium vapour

L. Barbier, M. Chéret

The 'quasi-resonant' energy pooling process in a rubidium vapour (Rb(5p 2 P 3 2/)+Rb(5p 2 P 3 2/)+68 cm -1 to Rb(5d)+Rb(5s 2 S 1 2/)) is experimentally investigated. An asymptotic theoretical model is applied to this reaction and gives a cross section (1*10 -14 cm 2 ) close to the experimental value (3*10 -14 cm 2 ). The results are discussed together with available data for other alkali atoms.

Journal of Physics B Atomic and Molecular Physics•Sep 14, 1983•62 citations

Experimental evaluation of cross sections of photochemical reaction in Rb(5D,7S)+H_2 collisions

Yifan Shen

The Rb(5D,7S)+H2→RbH+H photochemical reaction has been studied.The RbH molecules are formed in three-body reactive collisions between exited 5D or 7S atoms and ground state H2 molecules.Using two-photon absorption.Rb vapor mixed with Hz gas was irradiated in a glass fluorescence cell with pulses of 778.2nm or 760.1nm radiation from a YAG laser pumped OPO laser,populating one of the 5D and 7S states by two-photon absorption.The resulting fluorescence included a direct component emitted in the decay of the optically excited state and a sensitized component arising from the collisionally populated.The measured fluorescent intensities are proportional to the products of the appropriate population.The rate equations were solved.We estimated the value of cross sections for collisional energy transfer from Rb(5D) to Rb(7S), from Rb(7S)to Rb(5D) to be (6.9±1.4)×10-17 and(2.1±0.4)×10-16 cm2,respectively.The cross sections for reactive collisions Rb(5D)+H2RbH+H and Rb(7S)+H2→RbH+H are (4.3±1.1)×10-17 and(5.8±1.5)×10-17 cm2,respectively.The relative reactivity with H2 for two studied atoms is in an order of Rb(7S)Rb(5D).

Jiguang zazhi•Jan 1, 2008•0 citations

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
The mechanisms of nonresonant excitation transfer process in thermal collisions of two rubidium atoms Rb(7S) + Rb(5S) → Rb(5D) + Rb(5S) was studied theoretically, under conditions when the initial and final states of a system of two colliding atoms are not connected with each other by electric multipole transitions. Population processes of Rb 5D states were considered using calculated adiabatic potential curves of the Rb 2 quasimolecule in asymptotic approximation. The calculated cross-sections (σ theor = 5.0 × 10 −15 cm 2 ) are in good agreement with experimental results [σ exp = (8.0 ± 4.0) × 10 −15 cm 2 ] at thermal collision energies ( T ∼ 500 K).
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).
Rb vapor was irradiated in a glass fluorescence cell with pulses of radiation from a YAG laserpumped OPO laser,populating 5D_j(or 7S) state by two-photon absorption.Energy transfer in Rb (5D_J,7S)+Rb(5S) collision is studied using methods of atomic fluorescence.The resulting fluorescence includes a direct component emitted in the optically excited state decay and a sensitized component arsing. from the collisional populated state.At the different densities of the components,fitting a three-state rate equation model,the cross sectionσ=(3.7±0.9)×10~(-14) cm~2 was obtained for Rb(5D_(5/2))→Rb(5D_(3/2)) transfer.The cross section for excitation transfer out of the 5D_J doublet are(3.1±1.2)×10~(-14) cm~2(for J = 5/2) and(2.0±0.6)×10~(-14) cm~2(for J = 3/2),respectively.The energy transfer cross section for the Rb(5D)→Rb(7S) is small,(1.6±0.4)×10~(-16) cm~2.The 5D_J state is quenched mainly in the reverse energy pooling processes,i.e.Rb(5D_J)+Rb(5S)→Rb(5P)+ Rb(5P).
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 Rb(5D,7S)+H2→RbH+H photochemical reaction has been studied.The RbH molecules are formed in three-body reactive collisions between exited 5D or 7S atoms and ground state H2 molecules.Using two-photon absorption.Rb vapor mixed with Hz gas was irradiated in a glass fluorescence cell with pulses of 778.2nm or 760.1nm radiation from a YAG laser pumped OPO laser,populating one of the 5D and 7S states by two-photon absorption.The resulting fluorescence included a direct component emitted in the decay of the optically excited state and a sensitized component arising from the collisionally populated.The measured fluorescent intensities are proportional to the products of the appropriate population.The rate equations were solved.We estimated the value of cross sections for collisional energy transfer from Rb(5D) to Rb(7S), from Rb(7S)to Rb(5D) to be (6.9±1.4)×10-17 and(2.1±0.4)×10-16 cm2,respectively.The cross sections for reactive collisions Rb(5D)+H2RbH+H and Rb(7S)+H2→RbH+H are (4.3±1.1)×10-17 and(5.8±1.5)×10-17 cm2,respectively.The relative reactivity with H2 for two studied atoms is in an order of Rb(7S)Rb(5D).