Optical Pumping and Spin Exchange in Gas Cells

R. J. Knize, Zhen Wu, W. Happer

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

This chapter reflects on the current status of optical pumping and spin exchange in gas cells. Optical pumping is a method to produce population imbalances among the ground or excited state sublevels of atoms, and molecules by the interaction between the atomic system and light. In the preceding examples, any spin polarization of the atomic vapor generated by the pumping light is along the direction of the static magnetic field. This is called “longitudinal pumping.” Transverse optical pumping occurs when the pumping light generates an atomic polarization along a direction perpendicular to the static magnetic field. As depopulation pumping relies on the different pumping rates out of different sublevels, the efficiency of depopulation pumping depends on the polarization and spectral profile of the pumping light. In addition to directly polarizing an atom by optical pumping, it is possible to polarize atoms by spin-transfer collisions. Spin-exchange collisions will always be present in any polarized vapor and can be very important, especially for paramagnetic atoms such as alkali atoms.

Original languageEnglish (US)
Pages (from-to)223-267
Number of pages45
JournalAdvances in Atomic and Molecular Physics
Volume24
Issue numberC
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

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Optical pumping
spin exchange
optical pumping
pumping
Gases
Atoms
Pumping (laser)
cells
gases
atoms
Vapors
Polarization
Magnetic fields
Spin polarization
polarization
Alkalies
vapors
Excited states
Ground state
collisions

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Knize, R. J. ; Wu, Zhen ; Happer, W. / Optical Pumping and Spin Exchange in Gas Cells. In: Advances in Atomic and Molecular Physics. 1988 ; Vol. 24, No. C. pp. 223-267.
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Optical Pumping and Spin Exchange in Gas Cells. / Knize, R. J.; Wu, Zhen; Happer, W.

In: Advances in Atomic and Molecular Physics, Vol. 24, No. C, 01.01.1988, p. 223-267.

Research output: Contribution to journalArticle

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