Collectivity in neutron-deficient Pb and Po nuclei

T. Grahn; A. Dewald; O. Möller; R. Julin; C. W. Beausang; S. Christen; I. G. Darby; S. Eeckhaudt; P. T. Greenlees; A. Görgen; K. Helariutta; J. Jolie; H. Kettunen; T. Kröll; R. Krücken; P. Jones; S. Juutinen; Y. Le Coz; M. Leino; A.-P. Leppänen; P. Maierbeck; B. Melon; D. A. Meyer; P. Nieminen; M. Nyman; R. Page; J. Pakarinen; P. Petkov; P. Rahkila; B. Saha; M. Sandzelius; J. Sarén; C. Scholey; J. Uusitalo

doi:10.1140/epjst/e2007-00282-8

2022 Impact factor 2.8

Special Topics

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

Collectivity in neutron-deficient Pb and Po nuclei

T. Grahn¹^,2, A. Dewald³, O. Möller³, R. Julin¹, C. W. Beausang⁴, S. Christen³, I. G. Darby¹^,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. Pakarinen¹^,2, P. Petkov⁸, P. Rahkila¹, B. Saha³, M. Sandzelius¹, J. Sarén¹, C. Scholey¹ and J. Uusitalo¹

¹ Department of Physics, University of Jyväskylä, PL 35, 40014 Jyväskylä, Finland
² Department of Physics, Oliver Lodge Laboratory, University of Liverpool, L69 7, ZE Liverpool, 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, 1000 Helsinki, Finland
⁷ Physik-Department E12, TU München, 85748 Garching, Germany
⁸ Institute for Nuclear Research and Nuclear Energy, 1000 Sofia, Bulgaria

Received: 31 January 2007
Published online: 8 December 2007

Abstract

Lifetimes of low-lying yrast states in ¹⁸⁶Pb and ¹⁹⁴Po 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 ¹⁸⁸Pb up to the 8⁺ state were carried out using the recoil gating method. The deformation parameters and for the prolate (^186,188Pb) and the oblate (¹⁹⁴Po) bands, respectively, have been extracted from the measured lifetimes.