The decay scheme of 228Fr and K = 0 BANDS in 228Ra |
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Authors: | E. Ruchowska W. Kurcewicz N. Kaffrell T. Björnstad G. Nyman |
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Affiliation: | 1. Institute of Experimental Physics, University of Warsaw, 00-681 Warsaw, Poland;2. Kernfysisch Versneller Instituut, University of Groningen, 9747 AA Groningen, The Netherlands;3. Institute of Experimental Physics, University of Warsaw, 00-681 Warsaw, Poland;4. GSI, D-6100 Darmstadt, Federal Republic of Germany |
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Abstract: | The γ-rays following the β?-decay of 228Fr have been studied by means of γ-ray singles including multi-spectrum analysis and γ-γ coincidence measurements using Ge(Li) spectrometers. Most of the observed γ-transitions could be placed in the level scheme of 228Ra. The accuracy the energy of the first-excited state in 228Ra has been improved and 35 new excited levels have been established, 11 of them grouped into the ground-state band, the low-lying Kπ = 0? band with the head at 474.14 keV and two excited Kπ = 0+ bands with heads at 721.17 and 1041.9 keV. Candidates for two close-lying Kπ = 2+ bands have also been found. It is concluded that the ground state octupole deformation, if any, is less pronounced in 228Ra than in lighter radium isotopes. |
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Keywords: | Radioactivity |
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