Optically pumped atomic spin orientation and the law of mass action for 2Cs ⇄ Cs2

J. J. Ho*, Chongye Wang, R. A. Bernheim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The effect of optically pumped atomic spin orientation on the atom-dimer equilibrium in cesium vapor has been observed. Such a shift in equilibrium was predicted over two decades ago and is due to the redistribution of spin-determined bonding and antibonding collision trajectories. Orientation of the total spin angular momentum of 6 2S1/2 ground state Cs atoms in the vapor phase was produced by optical pumping with a tunable cw dye laser. A decrease in the equilibrium molecular density resulted and was measured using laser induced fluorescence from the B 1IIu state. The shift in equilibrium is a function of the degree of atomic orientation and could be observed in the temperature range 383-421 K for cesium vapor in a glass cell which also contained a He-N2 buffer gas mixture with a composition ratio of 9:1.

Original languageEnglish
Pages (from-to)2635-2639
Number of pages5
JournalThe Journal of Chemical Physics
Issue number5
Publication statusPublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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