Abstract

The isotope shift in the $7{}^2{S}_{\frac{1}{2}}-6{}^2{P}_{\frac{1}{2}}$ transition (3776 Å) and the hyperfine-structure separations of Tl²⁰³ and Tl²⁰⁵ in the $7{}^2{S}_{\frac{1}{2}}$ state have been determined spectroscopically by atomic beam absorption with the use of a Fabry–Pérot interferometer crossed with a 10-in. diffraction grating. Our results are: 0.0554 ± 0.0012 cm⁻¹ for the isotope shift in the 3776 Å line; −0.0405 ± 0.0013 cm⁻¹ in the $6{}^2{P}_{\frac{1}{2}}$ level; and $\Delta \nu \left(7{}^2{S}_{\frac{1}{2}}\right)=0.4078\pm 0.0014{\text{cm}}^{-1}$ and 0.4109 ± 0.0012 cm⁻¹ for the hyperfine-structure separation in Tl²⁰³ and Tl²⁰⁵, respectively.

© 1962 Optical Society of America

Hyperfine Structure of Thallium²⁰³ and Thallium²⁰⁵ in the 7²S₁₂ State*

R. J. Hull and H. H. Stroke
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Hyperfine structure and isotope shift of 52-h ²⁰³Pb in the 6p^{2 3}P₀–6p7s³P₁ 283.3-nm transition

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Hyperfine Structure, Nuclear Moments, and Isotope Shifts of ¹⁹⁷Tl and ¹⁹⁸Tl

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Hyperfine Structure of ²⁰⁹Bismuth in the 6p²(P3₀)7s P4₁₂ State*

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Isotope shifts in the 6p² P3₀-6p7s P31∘ 283.3-nm line of natural lead

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