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

Proceedings of the Royal Society of London A Mathematical and Physical Sciences

Spin-change cross-sections for collisions between alkali atoms

A. Dalgarno, M R H Rudge

Published Aug 3, 1965• 70 citations
Publisher

Abstract

Abstract A simple procedure is described for the calculation of the interactions between two atoms at intermediate separations and the spin-change cross-sections for collisions between pairs of atoms selected from hydrogen, lithium, sodium, potassium, rubidium and caesium are calculated. Satisfactory agreement with the measured values is obtained.

DOI
10.1098/rspa.1965.0161

Related papers

Complex cross sections of spin exchange in collisions of sodium and potassium atoms in the ground state

Victor A. Kartoshkin

Complex cross sections of the spin exchange are calculated for the first time for interacting Na and K atoms based on the data on the singlet (X 1Σ+) and triplet (a 3Σ+) potentials that describe the interaction of these alkali-metal atoms in the ground state. The obtained cross sections allow one to theoretically consider the polarization transfer processes and calculate the relaxation times and the magnetic resonance frequency shifts caused by Na-K spin-exchange collisions.

Optics and Spectroscopy•Nov 1, 2010•15 citations

Calculations of Spin-Exchange Cross Sections of Alkali Atoms by Partial-Wave Analysis

C. K. Chang, R. H. Walker

Four different spin-dependent scattering cross sections are calculated by semiclassical and by partial-wave analyses for each of the five alkali atoms, Li, Na, K, Rb, and Cs, for 124 different relative kinetic energies. These cross sections are finally averaged thermally. The results agree very well with experiments.In the calculation, the interaction potential between two alkali atoms is calculated by individually considering the interaction due to the two valence $s$ electrons and to the closed electronic shells of the two atoms. The two-$s$-electron interaction is generated ad hoc phenomenologically from the known hydrogen-hydrogen interatomic potential and the closed-shell interaction from interatomic potentials of two inert atoms corresponding to the cores. The potentials so obtained are in agreement with those constructed from band spectra.

Physical Review•Feb 5, 1969•12 citations

A Measurement Of The Spin-exchange Cross-section Of Cesium-133, Rubidium-87,85, Potassium-39 And Sodium-23.

N Ressler

This thesis reports measurements to determine the spin exchange cross section for collisions between like alkali n ???' sPift-exchange cross section was determined for Cs-LJJ, Rbo/, Rb°5, k39, and Na23.Table of Contents Page List of Tables v List of Figures vi Chapter 1. 5 A. Hyperfine Structure and Zeeman Sub-Levels 5 B. Spin Exchange 9 C. Density Matrix Description of Spin-Exchange 16 D. Application to Hydrogen 20 E. Intermediate Field 24 F.

•Jan 1, 1967•0 citations

Spin destruction in rubidium-rubidium and potassium-potassium collisions

R. J. Knize

The spin-destruction rates due to rubidium-rubidium and potassium-potassium collisions involving the ${S}_{1/2}$ ground states were measured. These spin-destruction cross sections decrease about an order of magnitude for the next lighter alkali-metal atom when comparing cesium, rubidium, and potassium.

Physical Review A•Dec 1, 1989•27 citations

Total elastic scattering and spin-change cross sections for collision between alkali atoms

Heloisa Dickinson, M R H Rudge

Semi-theoretical potential energy curves for the x 1 Sigma and x 3 Sigma states of the diatomic alkalis Na 2 , K 2 , Rb 2 , Cs 2 and RbCs are presented and compared with other estimates. Using these potential-energy functions calculations of the total elastic and spin-change cross sections have been made. The cross sections are compared with experimental data and with the results of other theoretical calculations.

Journal of Physics B Atomic and Molecular Physics•Nov 1, 1970•22 citations

Collisions between spin polarized alkali atoms. Complex cross sections

Victor A. Kartoshkin

This work is devoted to the calculation of complex cross sections for the spin exchange collisions between polarized alkali atoms. This is of interest for two reasons. First, knowledge of the cross sections allows one to quantitatively analyze spin-exchange collisions. Second, the obtained results can be used in practice to create quantum electronic devices with optical orientation based on the spin-exchange principle.

Journal of Physics Conference Series•Sep 7, 2015•0 citations
Abstract A simple procedure is described for the calculation of the interactions between two atoms at intermediate separations and the spin-change cross-sections for collisions between pairs of atoms selected from hydrogen, lithium, sodium, potassium, rubidium and caesium are calculated. Satisfactory agreement with the measured values is obtained.
Four different spin-dependent scattering cross sections are calculated by semiclassical and by partial-wave analyses for each of the five alkali atoms, Li, Na, K, Rb, and Cs, for 124 different relative kinetic energies. These cross sections are finally averaged thermally. The results agree very well with experiments.In the calculation, the interaction potential between two alkali atoms is calculated by individually considering the interaction due to the two valence sss electrons and to the closed electronic shells of the two atoms. The two-sss-electron interaction is generated ad hoc phenomenologically from the known hydrogen-hydrogen interatomic potential and the closed-shell interaction from interatomic potentials of two inert atoms corresponding to the cores. The potentials so obtained are in agreement with those constructed from band spectra.
The spin-destruction rates due to rubidium-rubidium and potassium-potassium collisions involving the S1/2{S}_{1/2}S1/2​ ground states were measured. These spin-destruction cross sections decrease about an order of magnitude for the next lighter alkali-metal atom when comparing cesium, rubidium, and potassium.