Studies of quadrupole collectivity in the γ -soft 106 Ru

• Published in: The European physical journal. A, Hadrons and nuclei Vol. 35; no. 2; p. 159
• Main Authors: Sanchez-Vega, M., Mach, H., Taylor, R. B. E., Fogelberg, B., Lindroth, A., Aas, A. J., Dendooven, P., Honkanen, A., Huhta, M., Lhersonneau, G., Oinonen, M., Parmonen, J. M., Penttila, H., Aysto, J., Persson, J. R., Kurpeta, J.
• Format: Journal Article
• Language: English
• Published: 2008
• Subjects: Fysik; NATURAL SCIENCES; NATURVETENSKAP; Physics
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/i2007-10530-3

Various alternative models were used to describe the structure of Ru-106. For example, the General Collective Model (GCM) predicts shape-coexistence for Ru-106 with a spherical and a triaxial minimum and strongly mixed structures, while in the IBA-2 calculations, where Ru-106 was considered as transitional from vibrational U(5) to gamma -soft O(6) , no need was found to include the shape-coexisting configurations. In order to provide additional constraints on the model interpretations, we have applied the Advanced Time-Delayed (ATD) beta gamma gamma(t) method to measure the level lifetimes of the excited levels in Ru-106 . The new results include the half-lives of T-1/2 = 183(3) ps and 7.5(30)ps for the 2(1)(+) and 2(1)(+) states, respectively.