Radioactive decay of Y-80 and low-lying states in Sr-80

Citation
J. Doring et al., Radioactive decay of Y-80 and low-lying states in Sr-80, PHYS REV C, 59(1), 1999, pp. 59-70
Citations number
50
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
59
Issue
1
Year of publication
1999
Pages
59 - 70
Database
ISI
SICI code
0556-2813(199901)59:1<59:RDOYAL>2.0.ZU;2-Z
Abstract
The beta(+)/EC decay of a mass-separated Y-80 source has been studied by be ta- and gamma-ray spectroscopy following the bombardment of a thin Mg-24 ta rget with Ni-58 ions at 190 MeV. An extended decay scheme with 14 new state s in Sr-80 has been identified including the first observation of negative- parity states. The low-lying positive-parity states have been found to be c lustered indicating a pattern of one-, two-, and possibly three-phonon mult iplets characteristic of an anharmonic vibrator. Some states in Sr-80,an al so be grouped into a gamma-vibrational band. In general the low-lying state s in light strontium isotopes show vibrationlike collectivity which evolves to rotational behavior with increasing spin and decreasing neutron number. The observed 80Y beta-decay fragmentation and log ft values have also been used to assign spin and parity of 4(-) and 1(-) to the parent ground state and the 228.5 keV isomeric state, respectively. [S0556-2813(99)01601-5].