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Nuclear orientation of57Co

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Abstract

57Co has been oriented in an iron foil at temperatures down to 12.7 moK. The57Co magnetic moment was measured by taking temperature-dependent57Co and60Co data, and the result was μ(57Co)=4.733±0.023 n.m. The mixing ratios, δ=E2/M1, of the intense 122 keV γ-ray as well as of the weak57Fe γ-rays, resulting from the decay of the 707 keV level, were measured. We obtained δ (122)=0.1195±0.0010, −0.186<δ (230) <0.072 or −6.99<δ (230)<−2.38, δ (352)=0.038±0.010 or 3.35±0.12, δ (367)= =−0.047±0.025 or −1.56±0.09, δ (340)=0.0827±0.0051, δ (570)=0.0974±0.0081 and δ (692)=−0.4654±0.0082.

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Author notes

  1. E. J. Cohen

    Present address: Jet Propulsion Laboratory, 91103, Pasadena, California

  2. A. J. Becker

    Present address: Physics Department, Columbia University, 10027, New York, N.Y.

Authors and Affiliations

  1. California Institute of Technology, 91125, Pasadena, California

    E. J. Cohen, A. J. Becker, N. K. Cheung & H. E. Henrikson

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Work performed under the auspices of the US Atomic Energy Commission under Contract AT [04-3]-63.

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Cohen, E.J., Becker, A.J., Cheung, N.K. et al. Nuclear orientation of57Co. Hyperfine Interact 1, 193–215 (1975). https://doi.org/10.1007/BF01022454

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