Rotation Dependence of Electric Quadrupole Hyperfine Interaction in the Ground State of Molecular Iodine by High-Resolution Laser Spectroscopy

Published

March 1, 2001

Author(s)

F L. Hong, J Ye, L -. Ma, S Picard, C J. Borde, J L. Hall

Abstract

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-statilized lasers. The measured hyperfine splittings including both main and crossover lines are fitted to a four-term Hamiltonian, which includes the electric quadrupole, spinrotation, tensor spin-spin and scalar spin-spin interactions, with an average deviation of {difference} 1kHz. 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 (Ņ = 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)²MHz.

Citation

Journal of the Optical Society of America B-Optical Physics

Volume

18

Issue

No. 3

Pub Type

Journals

Keywords

high-resolution laser spectroscopy, hyperfine structure, neutrology

Citation

Hong, F. , Ye, J. , Ma, L. , Picard, S. , Borde, C. and Hall, J. (2001), Rotation Dependence of Electric Quadrupole Hyperfine Interaction in the Ground State of Molecular Iodine by High-Resolution Laser Spectroscopy, Journal of the Optical Society of America B-Optical Physics (Accessed October 28, 2025)