Abstract
In the decay of Co56 the following quantities have been measured:γ-ray intensities,β-γ directional correlation, andβ-(circularly polarizedγ) correlation. The directional correlation anisotropy was found to be, forβ energies above 300 keV,A 2=0.5±0.4 per cent, corresponding to small or vanishing twice forbidden contributions to the allowed decay. The asymmetry parameterA of theβ-(circularly polarizedγ) correlation was measured to beA=−0.01±0.05 which implies a ratiox between Fermi and Gamow-Teller contributions to the decay ofx=−0.10±0.07, in agreement with the isospin selection rule. In the decay of J131 the following quantities have been measured: shape of the 606 keVβ-ray group,γ-ray intensities, conversion coefficients, andβ-(circularly polarizedγ) correlations. The measuredK/L ratio of the 364 keVγ-transition,K/L=6.0±0.2, is compatible with the conversion tables of Sliv and Band only. The multipolarities of theγ rays of 364, 637, and 723 keV were deduced. The 606 keVβ-364 keVγ cascade was used as a new calibration standard for analysers of circularly polarizedγ-rays.
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Über Teilergebnisse wurde bereits kurz berichtet:Daniel, H., M.Kuntze u. O.Mehling: Z. Naturforsch.16a, 1118 (1961). —Daniel, H., P.Schmidlin u. E.Thummernicht: Physik. Verhandl.14, 111 (1963).
Herrn Prof. W.Gentner danken wir für sein förderndes Interesse. Für Unterstützung oder Diskussion danken wir U.Schmidt-Rohr, O.Müller, J.Hüfner und Frl. H.Heider.
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Daniel, H., Mehling, O., Schmidlin, P. et al. Zerfallsschemata, β-Matrixelemente und γ-Multipolordnungen für die Übergänge Co56→Fe56 und J131→Xe131 . Z. Physik 179, 62–75 (1964). https://doi.org/10.1007/BF01379214
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DOI: https://doi.org/10.1007/BF01379214