Anomalous band-crossings in the N=57 isotones 103 Pd and 105 Cd
1993; IOP Publishing; Volume: 19; Issue: 11 Linguagem: Inglês
10.1088/0954-3899/19/11/002
ISSN1361-6471
AutoresP. H. Regan, G.D. Dracoulis, G. J. Lane, P. M. Walker, S.S. Anderssen, A.P. Byrne, P. M. Davidson, T. Kibédi, A. E. Stuchbery, Ka Chun Au Yeung,
Tópico(s)Astronomical and nuclear sciences
ResumoHigh-spin states of the N=57 isotones, 103Pd and 105Cd, have been studied using the reactions 94Zr(16O, alpha 3n)103Pd and 94Zr(16O,5n)105Cd. The nu h11/2 yrast bands in both nuclei are extended up to spin 47/2h(cross), past the first band-crossing. The observed increase in alignment in both bands is significantly lower than in analogous bands in the heavier odd-N isotopes, where the alignment is thought to be due to a pair of low- Omega h11/2 neutrons. The relatively low increase in alignment in 103Pd and 105Cd is consistent with cranked shell model calculations which predict that at low deformation both the (g9/2)2 proton and the (g7/2)2 neutron alignments are favoured in these N=57 isotones, over the (h11/2)2 neutron alignment.
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