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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 18, Iss. 3 — Mar. 1, 2001
  • pp: 379–387

Rotation dependence of electric quadrupole hyperfine interaction in the ground state of molecular iodine by high-resolution laser spectroscopy

Feng-Lei Hong, Jun Ye, Long-Sheng Ma, Susanne Picard, Christian J. Bordé, and John L. Hall  »View Author Affiliations

JOSA B, Vol. 18, Issue 3, pp. 379-387 (2001)

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Doppler-free high-resolution spectroscopy is applied to molecular iodine at 532 nm by Nd:YAG lasers. The main hyperfine components as well as the crossover lines are measured for R(56)32-0 and P(54)32-0 transitions by heterodyne beating of two I2-stabilized lasers. The measured hyperfine splittings including both main and crossover lines are fitted to a four-term Hamiltonian, which includes the electric quadrupole, spin–rotation, tensor spin–spin, and scalar spin–spin interactions, with an average deviation of 1 kHz. Absolute values of the electric quadrupole hyperfine constants for both the upper and the lower states are obtained. The rotation dependence of the ground-state (v=0) electric quadrupole constant eQq is found to be eQq(J)=-2452.556(2)-0.000164(5)J(J+1)-0.000000005(2)J2(J+1)2 MHz.

© 2001 Optical Society of America

OCIS Codes
(020.2930) Atomic and molecular physics : Hyperfine structure
(120.3940) Instrumentation, measurement, and metrology : Metrology
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6460) Spectroscopy : Spectroscopy, saturation

Feng-Lei Hong, Jun Ye, Long-Sheng Ma, Susanne Picard, Christian J. Bordé, and John L. Hall, "Rotation dependence of electric quadrupole hyperfine interaction in the ground state of molecular iodine by high-resolution laser spectroscopy," J. Opt. Soc. Am. B 18, 379-387 (2001)

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