Test of time-reversal invariance in the beta decay of Co56

Frank Calaprice, S. J. Freedman, B. Osgood, W. C. Thomlinson

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Abstract

A limit on time reversal noninvariance is obtained by measuring the β-γ angular correlation in the decay of oriented Co56. From a search for a correlation of the form E1(J^•k^)(J^•p^×k^), where J^, p^, and k^ are unit vectors in the direction of the orientation axis, positron momentum, and photon momentum, respectively, we obtain E1=2ysinφ(1+v2)=-0.011±0.022, where yeiφ=CVMFCAMGT. RADIOACTIVITY Co56: measured βγ correlations from oriented nuclei, inferred limit on time reversal violation.

Original languageEnglish (US)
Pages (from-to)381-389
Number of pages9
JournalPhysical Review C
Volume15
Issue number1
DOIs
StatePublished - Jan 1 1977

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Calaprice, F., Freedman, S. J., Osgood, B., & Thomlinson, W. C. (1977). Test of time-reversal invariance in the beta decay of Co56. Physical Review C, 15(1), 381-389. https://doi.org/10.1103/PhysRevC.15.381