作者: J. D. Prestage , J. J. Bollinger , Wayne M. Itano , D. J. Wineland
DOI: 10.1103/PHYSREVLETT.54.2387
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摘要: The frequency of a nuclear spin-flip (Vertical Bar..delta..m/sub I/Vertical Bar = 1) transition in /sup 9/Be/sup +/ has been compared to the hydrogen maser Bar..delta..FVertical 1, ..delta..m/sub F/ 0) see if relative frequencies depend on orientation ions space. present null result represents decrease limits set by Hughes and Drever spatial anisotropy factor about 300.