Abstract

The laser-rf double-resonance technique has been used to determine the zero-field hyperfine intervals in the 620-cm⁻¹ atomic level of ²³⁵U to an absolute precision of 1 kHz. Analysis of the results leads to the values A = −68.3457 ± 0.0010 MHz and B = 40.110 ± 0.030 MHz, uncorrected for second-order effects. Examination of the hyperfine structure of the metastable level at 8119 cm⁻¹ by laser fluorescence strongly suggests that the same technique could be used to give high-precision results for all metastable levels up to at least 10000 cm⁻¹.

© 1979 Optical Society of America

High-precision measurement of ²³⁵U ground-state hyperfine structure by laser-rf double resonance

W. J. Childs, O. Poulsen, and L. S. Goodman
Opt. Lett. 4(1) 35-37 (1979)

Hyperfine structure measurements on some ²³⁵U levels by laser fluorescence spectroscopy

Y. Deniers, J. M. Gagné, C. Drèze, and P. Pianarosa
J. Opt. Soc. Am. B 3(12) 1678-1680 (1986)

²³⁵U ii hyperfine structures measured by collinear fast-beam-laser and radio-frequency-laser double-resonance spectroscopy

Ulrik Nielsen, Per Thorsen, Ove Poulsen, and Hannah Crosswhite
J. Opt. Soc. Am. B 1(2) 284-292 (1984)

Hyperfine structure measurements of high-lying levels of uranium

L. A. Hackel, C. F. Bender, M. A. Johnson, and M. C. Rushford
J. Opt. Soc. Am. 69(2) 230-232 (1979)

Assignment of unclassified lines in Tb i through high-resolution laser-fluorescence measurements of hyperfine structure

W. J. Childs and L. S. Goodman
J. Opt. Soc. Am. 69(6) 815-819 (1979)