Year: 2014
Type: article
Abstract: Excited states in the $N=102$ isotones $^{166}\mathrm{Gd}$ and $^{164}\mathrm{Sm}$ have been observed following isomeric decay for the first time at RIBF, RIKEN. The half-lives of the isomeric states have been measured to be 950(60) and 600(140) ns for $^{166}\mathrm{Gd}$ and $^{164}\mathrm{Sm}$, respectively. Based on the decay patterns and potential energy surface calculations, including ${\ensuremath{\beta}}_{6}$ deformation, a spin and parity of ${6}^{\ensuremath{-}}$ has been assigned to the isomeric states in both nuclei. Collective observables are discussed in light of the systematics of the region, giving insight into nuclear shape evolution. The decrease in the ground-band energies of $^{166}\mathrm{Gd}$ and $^{164}\mathrm{Sm}$ ($N=102$) compared to $^{164}\mathrm{Gd}$ and $^{162}\mathrm{Sm}$ ($N=100$), respectively, presents evidence for the predicted deformed shell closure at $N=100$.
Source: Physical Review Letters
Authors: Z. Patel, P.-A. Söderström, Zs. Podolyák, P. H. Regan, P. M. Walker, H. Watanabe, E. Ideguchi, G. S. Simpson, H. L. Liu, S. Nishimura, Q. Wu, F. R. Xu, F. Browne, P. Doornenbal, G. Lorusso, S. Rice, L. Sinclair, T. Sumikama, J. Wu, Z. Y. Xu, N. Aoi, H. Baba, F. L. Bello Garrote, G. Benzoni, R. Daido, Y. Fang, N. Fukuda, G. Gey, S. Go, A. Gottardo, N. Inabe, T. Isobe, D. Kameda, K. Kobayashi, M. Kobayashi, T. Komatsubara, I. Kojouharov, T. Kubo, N. Kurz, I. Kuti, Z. Li, M. Matsushita, S. Michimasa, C.-B. Moon, H. Nishibata, I. Nishizuka, A. Odahara, E. Şahin, H. Sakurai, H. Schaffner, H. Suzuki, H. Takeda, M. Tanaka, J. Taprogge, Zs. Vajta, A. Yagi, R. Yokoyama
Institutions: University of Surrey, RIKEN Nishina Center, National Physical Laboratory, Beihang University, Research Center for Nuclear Physics, The University of Osaka, The University of Osaka, Centre National de la Recherche Scientifique, Université Joseph Fourier, Institut National de Physique Nucléaire et de Physique des Particules, Laboratoire de Physique Subatomique et de Cosmologie, Xi'an Jiaotong University, Peking University, State Key Laboratory of Nuclear Physics and Technology, University of Brighton, University of York, Tohoku University, The University of Tokyo, University of Oslo, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Center for Nuclear Study, The University of Tokyo, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Rikkyo University, University of Tsukuba, Institute for Basic Science, GSI Helmholtz Centre for Heavy Ion Research, HUN-REN Institute for Nuclear Research, Hungarian Academy of Sciences, Hoseo University, Consejo Superior de Investigaciones Científicas, Instituto de Estructura de la Materia, Universidad Autónoma de Madrid
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G3093188293, G4748126882, G5548152103, G5550838049, G616056998, Elucidation of the rare-earth element peak around A = 160 in the r-process nucleosynthesis, 中性子過剰核の特異な構造を通じた核子間対相互作用の解明, G7489926659, Relation between nuclear shape and beta-decay half life of neutron-rich Zr isotopes, Study of neutron-rich nuclei relevant to 1st and 2nd peak of r-process nucleosynthesis
OpenAlex ID: W2004451335