Investigation of the K-pi=8(-) isomer in Ce-132 - art. no. 034302

Citation
T. Morek et al., Investigation of the K-pi=8(-) isomer in Ce-132 - art. no. 034302, PHYS REV C, 6303(3), 2001, pp. 4302
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C
ISSN journal
0556-2813 → ACNP
Volume
6303
Issue
3
Year of publication
2001
Database
ISI
SICI code
0556-2813(200103)6303:3<4302:IOTKII>2.0.ZU;2-N
Abstract
The decay of the K-pi = 8(-) isomer in Ce-132 with an excitation energy of 2340.2 keV has been investigated using the Sn-120(O-16,4n)Ce-132 reaction. A half-life of 9.4+/-0.3 ms was determined. Two new decay paths have been f ound in the deexcitation of this isomer. The hindrance factors for the E1, M2, and E3 transitions deexciting the isomer have been determined The decay properties of the 8(-) isomers in the N = 74 isotones are discussed. A ban d mixing mechanism involving the ground state and s band seems to be respon sible for the behavior of the reduced hindrance factors of the E1 transitio ns deexciting the K-pi =8(-) isomers in these isotones. A K mixing, charact eristic of the axially asymmetric nuclei, may account for the reduced hindr ance factors of the E3 transitions to the 5(gamma)(+) states in Ba-130 and Ce-132.