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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 5 — May. 1, 2014
  • pp: 1046–1053

Hyperfine Paschen–Back regime in alkali metal atoms: consistency of two theoretical considerations and experiment

A. Sargsyan, G. Hakhumyan, C. Leroy, Y. Pashayan-Leroy, A. Papoyan, D. Sarkisyan, and M. Auzinsh  »View Author Affiliations

JOSA B, Vol. 31, Issue 5, pp. 1046-1053 (2014)

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Simple and efficient λ-method and λ/2-method (λ is the resonant wavelength of laser radiation) based on a nanometric-thickness cell filled with rubidium (Rb) are implemented to study the splitting of hyperfine transitions of an Rb85 and Rb87D1 line in an external magnetic field in the range of B=0.50.7T. It is experimentally demonstrated from 20 (12) Zeeman transitions allowed at low B-field in Rb85 (Rb87) spectra in the case of σ+ polarized laser radiation, only 6 (4) remain at B>0.5T, caused by decoupling of the total electronic momentum J and the nuclear spin momentum I (hyperfine Paschen–Back regime). The expressions derived in the frame of completely uncoupled basis (J,mJ;I,mI) describe the experimental results extremely well for Rb85 transitions at B>0.6T (that is a manifestation of hyperfine Paschen–Back regime). A remarkable result is that the calculations based on the eigenstates of the coupled (F,mF) basis, which adequately describe the system for a low magnetic field, also predict reduction of the number of transition components from 20 to 6 for Rb85 and from 12 to 4 for Rb87 spectrum at B>0.5T. Also, the Zeeman transition frequency shifts, frequency intervals between the components and their slope versus B, are in agreement with the experiment.

© 2014 Optical Society of America

OCIS Codes
(020.2930) Atomic and molecular physics : Hyperfine structure
(020.7490) Atomic and molecular physics : Zeeman effect
(300.6210) Spectroscopy : Spectroscopy, atomic

ToC Category:
Atomic and Molecular Physics

Original Manuscript: December 6, 2013
Revised Manuscript: March 7, 2014
Manuscript Accepted: March 13, 2014
Published: April 9, 2014

A. Sargsyan, G. Hakhumyan, C. Leroy, Y. Pashayan-Leroy, A. Papoyan, D. Sarkisyan, and M. Auzinsh, "Hyperfine Paschen–Back regime in alkali metal atoms: consistency of two theoretical considerations and experiment," J. Opt. Soc. Am. B 31, 1046-1053 (2014)

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