Hyperfine Structure of Hydrogen, Deuterium, and Tritium

Abstract

The optical transmission of an optically oriented rubidium vapor in spin-exchange equilibrium with atomic hydrogen, deuterium, and tritium has been used to measure with high precision the hyperfine splittings of these paramagnetic atoms. The results are $\Delta \nu \left(\mathrm{H}\right)=1420.405726\mathrm{}\pm 0.000030 \mathrm{Mc}/sec,$ $\Delta \nu \left(\mathrm{D}\right)=327.384349\mathrm{}\pm 0.000005 \mathrm{Mc}/sec,$ and $\Delta \nu \left(\mathrm{T}\right)=1516.701396\mathrm{}\pm 0.000030 \mathrm{Mc}/sec.$ These results are based on a value of the hyperfine splitting of ${\mathrm{Cs}}^{133}$ which is taken to be $\Delta \nu \left({\mathrm{Cs}}^{133}\right)=9192.631840\mathrm{} \mathrm{Mc}/sec.$