Exploring the I=50-60h domain: collective and terminating structures in Dy-156, Er-159 and Er-160.

Authors
Kondev, FG Riley, MA Simpson, J Janssens, RVF Afanasjev, AV Ragnarsson, I Brown, TB Hartley, DJ Carpenter, MP Fallon, P Fischer, SM Khoo, TL Lauritsen, T Ma, WC Sharpey-Schafer, JF Lisle, JC Kalfas, CA
Citation
Fg. Kondev et al., Exploring the I=50-60h domain: collective and terminating structures in Dy-156, Er-159 and Er-160., J PHYS G-NU, 25(4), 1999, pp. 897-899
Citations number
10
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
ISSN journal
09543899 → ACNP
Volume
25
Issue
4
Year of publication
1999
Pages
897 - 899
Database
ISI
SICI code
0954-3899(199904)25:4<897:ETIDCA>2.0.ZU;2-5
Abstract
Very high spin (50-60 (h) over bar) states in transitional Dy-156, Er-159 a nd Er-160 nuclei have been studied using the GAMMASPHERE and EUROGAM gamma- ray spectrometers. The lowest energy positive-parity bands in Dy-156 are fo und to evolve smoothly towards an oblate shape in contrast to the sudden ch ange observed in the neighbouring Er-158 nucleus. In Er-159, the decay path of the positive-parity yrast band splits above I-pi = 85/2(+) and favoured multi-particle-hole states are identified in the irregular pattern at 89/2 (+) and 101/2(+). The yrast structure of Er-160 is found to remain collecti ve up to and beyond 50 (h) over bar with no sign of an apparent termination .