https://doi.org/10.1140/epja/i2014-14135-5
Regular Article - Experimental Physics
Beta-decay half-lives of new neutron-rich isotopes of Re, Os and Ir approaching the r-process path near N = 126
1
Departamento de Física de Partículas, Universidade de Santiago de Compostela, E-15782, Santiago de Compostela, Spain
2
GSI-Helmholtzzentrum für Schwerionenforschung GmbH, D-64291, Darmstadt, Germany
3
Institut de Physique Nucléaire, F-91406, Orsay, France
4
Centre d’Etudes Nucléaires de Bordeaux-Gradignan, CNRS/IN2P3-Université de Bordeaux, F-33175, Gradignan, France
5
GANIL, F-14076, CAEN Cedex 5, France
6
Institut für Kernphysik, TU Darmstadt, Schlossgartenstr. 9, D-64289, Darmstadt, Germany
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
23
May
2014
Revised:
27
July
2014
Accepted:
11
August
2014
Published online:
4
September
2014
Abstract
Heavy neutron-rich nuclei close to N = 126 were produced by fragmentation of a 1A GeV 208Pb beam at the FRS at GSI. The β-decay half-lives of 7 nuclides have been determined using a novel numerical analysis method. The half-lives of 202,199Ir, 200,199Os and 196Re are reported for the first time. The comparison of the data with model calculations provides indications on the importance of first-forbidden transitions on the β-decay of nuclei around N = 126 and Z < 82.
Present address: Centre d’Etudes Nucléaires de Bordeaux-Gradignan, CNRS/IN2P3-Université de Bordeaux, CS10120, F-33175, Gradignan, France
Present address: KIT-INE, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
Present address: Joint Institute for Nuclear Research, 141980, Dubna, Russia
Present address: Universidade de Vigo, 36310, Vigo, Spain
Present address: LANL, Los Alamos, NM, 87544, USA
Present address: NSCL-MSU, 1 Cyclotron, East Lansing, MI, 48824, USA
Present address: INRNE, 72 Tzarigradsko chausee, BG-1784, Sofia, Bulgaria
© SIF, Springer-Verlag Berlin Heidelberg, 2014
