Decay of an isomeric state in Cm244

Hansen, P. G. ; Wilsky, K. ; Baba, C. V. K. ; Vandenbosch, S. E. (1963) Decay of an isomeric state in Cm244 Nuclear Physics, 45 . pp. 410-416. ISSN 0029-5582

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The 1042 keV state in Cm244, which is populated in the β--decay of 10.1 Am244 has previously been assigned (K, Iπ)=(6,6+). This assignment has now been confirmed through an angular correlation measurement, and it was found that the 746 keV γ-ray is a mixture of 46% quadrupole (E2) and 54% dipole (M1). The half life of the 1042 keV state has been determined by measurement of delayed coincidences between β-particles and conversion electrons. The result is 34±2 ms. Comparison with the single particle estimate shows that the E2 transitions from the delayed state are hindered by factors of about 1010. This reflects the fact that the transitions are four times forbidden in K. The relative transition probabilities for the E2's from the delayed state are shown to agree well with a recent theoretical estimate.

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Deposited On:22 Apr 2011 10:21
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