β-Decay half-lives of 76,77Co, 79,80Ni, and 81Cu: experimental indication of a doubly magic 78Ni.

Autor: Xu ZY; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan and RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Nishimura S; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Lorusso G; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Browne F; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom., Doornenbal P; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Gey G; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and LPSC, Université Grenoble-Alpes, CNRS/IN2P3, F-38026 Grenoble Cedex, France and ILL, 38042 Grenoble Cedex, France., Jung HS; Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA., Li Z; Department of Physics, Peking University, Beijing 100871, China., Niikura M; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan., Söderström PA; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Sumikama T; Department of Physics, Tohoku University, 6-3 Aramaki-Aoba, Aoba, Sendai, Miyagi 980-8578, Japan., Taprogge J; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain and Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain., Vajta Z; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and Institute for Nuclear Research, Hungarian Academy of Sciences, P.O. Box 51, Debrecen H-4001, Hungary., Watanabe H; IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China., Wu J; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan and Department of Physics, Peking University, Beijing 100871, China., Yagi A; Department of Physics, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan., Yoshinaga K; Department of Physics, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan., Baba H; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Franchoo S; Institut de Physique Nucléaire d'Orsay, IN2P3-CNRS, F-91406 Orsay, France., Isobe T; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., John PR; Dipartimento di Fisica e Astronomia, Universitá di Padova and INFN Sezione di Padova, I-35131 Padova, Italy., Kojouharov I; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany., Kubono S; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Kurz N; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany., Matea I; Institut de Physique Nucléaire d'Orsay, IN2P3-CNRS, F-91406 Orsay, France., Matsui K; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan., Mengoni D; Dipartimento di Fisica e Astronomia, Universitá di Padova and INFN Sezione di Padova, I-35131 Padova, Italy., Morfouace P; Institut de Physique Nucléaire d'Orsay, IN2P3-CNRS, F-91406 Orsay, France., Napoli DR; Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy., Naqvi F; Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511, USA., Nishibata H; Department of Physics, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan., Odahara A; Department of Physics, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka 560-0043, Japan., Sahin E; Department of Physics, University of Oslo, Oslo NO-0316, Norway., Sakurai H; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan and RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan., Schaffner H; GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany., Stefan IG; Institut de Physique Nucléaire d'Orsay, IN2P3-CNRS, F-91406 Orsay, France., Suzuki D; Institut de Physique Nucléaire d'Orsay, IN2P3-CNRS, F-91406 Orsay, France., Taniuchi R; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, 113-0033 Tokyo, Japan., Werner V; Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2014 Jul 18; Vol. 113 (3), pp. 032505. Date of Electronic Publication: 2014 Jul 16.
DOI: 10.1103/PhysRevLett.113.032505
Abstrakt: The half-lives of 20 neutron-rich nuclei with Z=27-30 have been measured at the RIBF, including five new half-lives of (76)Co(21.7(-4.9)(+6.5) ms), (77)Co(13.0(-4.3)(+7.2) ms), (79)Ni(43.0(-7.5)(+8.6) ms), (80)Ni(23.9(-17.2)(+26.0) ms), and (81)Cu(73.2 ± 6.8 ms). In addition, the half-lives of (73-75)Co, (74-78)Ni, (78-80)Cu, and (80-82)Zn were determined with higher precision than previous works. Based on these new results, a systematic study of the β-decay half-lives has been carried out, which suggests a sizable magicity for both the proton number Z = 28 and the neutron number N=50 in (78)Ni.
Databáze: MEDLINE