Eur. Phys. J. Special Topics 150, 121-122 (2007)
DOI: 10.1140/epjst/e2007-00282-8

Collectivity in neutron-deficient Pb and Po nuclei

T. Grahn^{1, 2}, A. Dewald³, O. Möller³, R. Julin¹, C.W. Beausang⁴, S. Christen³, I.G. Darby^{1, 2}, S. Eeckhaudt¹, P.T. Greenlees¹, A. Görgen⁵, K. Helariutta⁶, J. Jolie³, H. Kettunen¹, T. Kröll⁷, R. Krücken⁷, P. Jones¹, S. Juutinen¹, Y. Le Coz⁵, M. Leino¹, A.-P. Leppänen¹, P. Maierbeck⁷, B. Melon³, D.A. Meyer⁴, P. Nieminen¹, M. Nyman¹, R. Page², J. Pakarinen^{1, 2}, P. Petkov⁸, P. Rahkila¹, B. Saha³, M. Sandzelius¹, J. Sarén¹, C. Scholey¹ and J. Uusitalo<sup>1

1</sup>  Department of Physics, University of Jyväskylä, PL 35, 40014 University of Jyväskylä, Finland
²  Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, UK
³  Institut für Kerphysik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
⁴  Wright Nuclear Structure Laboratory, Yale University, New Haven, CT 06520, USA
⁵  CEA Saclay DSM/DAPNIA/SPhN, 91191 Gif-sur-Yvette Cedex, France
⁶  Laboratory of Radiochemistry, Department of Chemistry, PL 55, 00014 University of Helsinki, Finland
⁷  Physik-Department E12, TU München, 85748 Garching, Germany
⁸  Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria

(Received: January 31, 2007 / Published online: 8 December 2007)

Abstract
Lifetimes of low-lying yrast states in and have been determined by employing, for the first time, the recoil-decay tagging technique in recoil distance Doppler-shift lifetime measurements. In addition, lifetime measurements of prolate states in up to the 8⁺ state were carried out using the recoil gating method. The deformation parameters and for the prolate and the oblate bands, respectively, have been extracted from the measured lifetimes. 27.70.+q-

PACS
21.10.Tg - - -.
27.80.+w - -.

© EDP Sciences, Springer-Verlag 2007