Lifetimes and electromagnetic transition strengths in Dy-155
- Petkov, P.
- Yavahchova, M. S.
- Moeller, O.
- Dewald, A.
- Tonev, D.
- Saha, B.
- Fitzler, A.
- Jessen, K.
- Klug, T.
- Heinze, S.
- Jolie, J.
- von Brentano, P.
- Goutev, N.
- Bazzacco, D.
- Ur, C. A.
- Farnea, E.
- Axiotis, M.
- Lunardi, S.
- de Angelis, G.
- Napoli, D. R.
- Marginean, N.
- Martinez, T.
- Caprio, M. A.
DOIAbstract
Recoil distance Doppler-shift and Doppler-shift attenuation lifetime measurements were carried out for levels in Dy-155 through the coincident detection of. rays. Twenty-six lifetimes, most of them for the first time, were determined using the differential decay curve method for the analysis of the data. At low and medium spins, particle-plus-triaxial-rotor calculations reveal different quadrupole deformations for the one-quasineutron bands in this transitional nucleus. At high spin, the reduced B(E2) transition probabilities confirm with a better precision the results of a previous study implying decreased collectivity with increasing spin
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