LEVEL STRUCTURE OF TH-227 INVESTIGATED IN THE ALPHA-DECAY OF U-231

Authors
MULLER U SEVENICH P FREITAG K GUNTHER C HERZOG P JONES GD KLIEM C MANNS J WEBER T WILL B
Citation
U. Muller et al., LEVEL STRUCTURE OF TH-227 INVESTIGATED IN THE ALPHA-DECAY OF U-231, Physical review. C. Nuclear physics, 55(5), 1997, pp. 2267-2278
Citations number
26
Categorie Soggetti
Physics, Nuclear
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
55
Issue
5
Year of publication
1997
Pages
2267 - 2278
Database
ISI
SICI code
0556-2813(1997)55:5<2267:LSOTII>2.0.ZU;2-6
Abstract
The level structure of Th-227 has been studied using the alpha decay o f U-231. The use of mass-separated U-231 sources and high-resolution a lpha-particle and gamma-ray spectroscopy enabled the identification of 16 excited levels of (227)Tn. The angular distribution of alpha parti cles in the decay of low-temperature oriented Th-227 is consistent wit h a (227)Tn ground-state spin of 1/2. The low-lying levels of Th-227,a n be interpreted in terms of a K = 1/2(+/-) parity doublet and a K = 3 /2(+) band coupled with the 1/2(+) member of the parity doublet by the Coriolis interaction.