Abstract:
The low spin states of 223Ra have been populated via α-decay from 227Th which was itself produced following β− decay of an 227Ac source. α–γ and α−e K,L,M angular correlation measurements have been analysed using the correct ground state spins of 227Th(=1/2+) and 223Ra(=3/2+) for the first time. The analysis has allowed unique Jπ values to be assigned to almost all levels below 400 keV excitation in 223Ra. Values of (g K−g R)/Q 0 have been deduced for several members of the K= 3/2± bands (for the first time in an odd N nucleus in this mass region) allowing estimates of g K and g R to be extracted. The values of g K and g R are not significantly different for the positive and negative parity band members and tend to support other strong evidence that stable octupole deformation exists in 223Ra at low excitation energies.
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Received: 17 November 1997 / Revised version: 8 January 1998
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Jones, G., Butler, P., Hoare, T. et al. A study of 223Ra populated by α-decay . EPJ A 2, 129–141 (1998). https://doi.org/10.1007/s100500050101
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DOI: https://doi.org/10.1007/s100500050101