https://doi.org/10.1140/epja/i2006-10006-0
Nuclear Structure and Reactions
Lifetimes and side-feeding population of the yrast band levels in 131La
1
Nuclear Physics Division, Warsaw University, Hoża 69, 00-681, Warsaw, Poland
2
Cyclotron Laboratory, A.F. Ioffe Physical Technical Institute, 194021, St.-Petersburg, Russia
3
The A. Sołtan Institute for Nuclear Studies, 05-400, Świerk, Poland
4
Heavy Ion Laboratory, Warsaw University, Warsaw, Poland
* e-mail: egrodner@npdoxp.fuw.edu.pl
Received:
6
February
2006
Accepted:
9
March
2006
Published online:
12
April
2006
Lifetimes of yrast levels with spins I π = 23/2--43/2- in 131La populated in the 122Sn(14N, 5n) reaction at a beam energy of 70MeV are measured by the Doppler Shift Attenuation method. A model of side-feeding population is presented. The model parameters are determined in an experiment based on the lineshape of γ-transitions from two highest spin levels and from the intensity distribution along the yrast band. The properties of the h 11/2 band in 131La are compared with the theoretical predictions obtained in the framework of the Core-Quasi-Particle Coupling and the self-consistent Total Routhian Surface models.
PACS: 21.10.Tg Lifetimes – / 21.60.Ev Collective models – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2006