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First forbidden beta decay in149Pm

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The 786 keV beta-286keV gamma angular correlation in the ground state decay of149Pm is measured for the first time, using the conventional slow-fast scintillation assembly. Integral correlation results characterize the involved beta transition to be of first-forbidden non-unique type. The present results combined with the other experimental parameters, strongly support a 9/2− spin-parity character to the 286 keV level in149Sm. The energy independence of the reduced correlation coefficient as found in this work shows the validity ofξ-approximation for the 786 keV beta transition in149Pm and is also consistent with the logft value and spectrum shape reported by earlier authors.

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Authors and Affiliations

  1. Laboratories for Nuclear Research, Andhra University, Waltair, India

    M. Srinivasa Rao, D. L. Sastry, D. K. Priyadarsini, S. Lakshminarayana & V. Seshagiri Rao

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  1. M. Srinivasa Rao
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  2. D. L. Sastry
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  3. D. K. Priyadarsini
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  4. S. Lakshminarayana
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  5. V. Seshagiri Rao
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Rao, M.S., Sastry, D.L., Priyadarsini, D.K. et al. First forbidden beta decay in149Pm. Z Physik A 290, 261–264 (1979). https://doi.org/10.1007/BF01408541

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  • DOI: https://doi.org/10.1007/BF01408541

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