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- W2314445027 endingPage "835" @default.
- W2314445027 startingPage "822" @default.
- W2314445027 abstract "The ratio of the ${g}_{J}$ factor of $^{4}mathrm{He}(2^{3}S_{1})$ to that of $^{87}mathrm{Rb}(5^{2}S_{frac{1}{2}})$ has been measured to a fractional accuracy of ifmmodepmelsetextpmfi{}5ifmmodetimeselsetexttimesfi{}${10}^{ensuremath{-}8}$. The Rb atoms were optically pumped, and the $^{4}mathrm{He}(2^{3}S_{1})$ Zeeman resonance was observed through a combination of spin-exchange collisions and spin-dependent Penning ionization. Linewidths as narrow as 220 Hz were observed for the $^{4}mathrm{He}(2^{3}S_{1})$ Zeeman resonance. The accuracy of this experiment was limited by a systematic shift in the He ${g}_{J}$ factor that depended upon the intensity of the discharge used to excite the He atoms to the $2^{3}S_{1}$ state. Calculations indicate that transfer of coherence in spin-exchange collisions with free electrons contributes to this shift. The measured ratio $frac{{g}_{J}(^{4}mathrm{He}, 2^{3}S_{1})}{{g}_{J}(^{87}mathrm{Rb}, 5^{2}S_{frac{1}{2}})}=1ensuremath{-}46.798(50)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}6}$. Using the previously measured ratio of the ${g}_{J}$ factors of the ground state of rubidium to the ground state of hydrogen, we determine the ratio $frac{{g}_{J}(^{4}mathrm{He}, 2^{3}S_{1})}{{g}_{J}(^{1}mathrm{H}, 1^{2}S_{frac{1}{2}})}=1ensuremath{-}23.214(50)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}6}$. This result agrees with recent theoretical calculations and experimental determinations using atomic-beam techniques, but disagrees with an earlier experimental determination using optical-pumping techniques." @default.
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- W2314445027 date "1977-09-01" @default.
- W2314445027 modified "2023-09-24" @default.
- W2314445027 title "An experimental determination ofgJ(He4, 2S13)gJ(H1, 1S122)" @default.
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- W2314445027 doi "https://doi.org/10.1103/physreva.16.822" @default.
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