Abstract
The half-lives of the 86.6 keV level in233Pa and the 59.6 keV level in237Np have been measured. A silicon surface barrier alpha detector and a NaI(Tl) gammadetector were used. The decay time spectrum of alpha-gamma coincidences obtained from a start-stop type of time-to-pulse height converter was recorded on a 2048-channel analyser. Analysis of the data gave the following half-life values:
. Using the experimental levelT 1/2's, partial gamma-ray half-lives have been calculated for the 86.6- and the 29.6-keV transitions (from the 86.6 keV level) in233Pa and the 59.6- and the 26.36-keV transitions (from the 59.6 keV level) in237Np. The results are compared with the single particle and the Nilsson estimates.
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The authors are thankful to Prof. F. C. Auluck, Head, Department of Physics and Astrophysics, University of Delhi for extending research facilities to carry out this work. We are also grateful to Dr. S. C. Pancholi for valuable discussions and criticism. Two of the authors (RKG and SDC) acknowledge with thanks the financial support granted by Council of Scientific and Industrial Research, New Delhi.
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Garg, R.K., Chauhan, S.D., Gupta, S.L. et al. Half-life measurements of the 86.6 keV level in233Pa and 59.6 keV level in237Np. Z. Physik 244, 312–320 (1971). https://doi.org/10.1007/BF01396790
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DOI: https://doi.org/10.1007/BF01396790