Hyperfine contribution to spin-exchange frequency shifts in cryogenic hydrogen masers

B.J. Verhaar, J.M.V.A. Koelman, H.T.C. Stoof, O.J. Luiten, S.B. Crampton

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Abstract

We have rigorously included hyperfine interactions during electron-spin-exchange collisions between ground state hydrogen atoms. We predict additional frequency shifts which are not compensated for by the usual methods of tuning maser cavities. These shifts are large compared to the potential thermal instabilities of cryogenic masers and are very sensitive to details of the interactions, especially the treatment of non-adiabatic effects.
Original languageEnglish
Pages (from-to)253-254
JournalJapanese Journal of Applied Physics, Part 1 : Regular Papers and Short Notes & Review Papers
Volume26
Issue numbersuppl. 26-3
Publication statusPublished - 1987

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