β-decay half-lives of neutron-rich nuclei around ¹⁵⁸Nd, relevant to the formation of the A≈165 rare-earth element peak

¹ School of Physics, Peking University, Beijing 100871, China
² RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
³ National Physical Laboratory, Teddington, Middlesex, TW11 0LW, U.K.
⁴ Department of Physics, Univeristy of Hong Kong
⁵ Research Center for Nuclear Physics, Osaka University, Japan
⁶ LPSC, UJF/INPG, CNRS/IN2P3, F-38026, Grenoble Cedex, France
⁷ School of Computing, Engineering and Mathematics, University of Brighton, U.K.
⁸ Department of Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
⁹ Department of Physics, University of Surrey, U.K.
¹⁰ Department of Physics, University of York, Heslington, York, YO10 5DD, U.K.
¹¹ Department of Physics, Tohoku University, Sendai 980-8578, Japan
¹² Department of Physics, Beihang University, China
¹³ Center for Nuclear Study, University of Tokyo, Japan
¹⁴ University of Oslo, P.O. Box 1072 Blindern, 0316 Oslo, Norway
¹⁵ INFN, Sezione di Milano, via Celoria 16, I-20133 Milano, Italy
¹⁶ ILL, 28042 Grenoble Cedex, France
¹⁷ INFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy
¹⁸ Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
¹⁹ Instituto, de Estructura de la Materia, CSIC, E-28006 Madrid, Spain

^a e-mail: wujin@ribf.riken.jp

Published online: 12 February 2016

Abstract

A β-decay spectroscopy experiment around ¹⁵⁸Nd was performed at RI Beam Factory (RIBF), RIKEN Nishina Center, in order to understand the production mechanism of the A≈165 rare-earth element (REE) peak in the r-process mass abundance pattern. In this experiment, 53 half-lives are measured including 34 new results, which could be employed in a fully dynamic r-process network calculation.