New isomers in 125 Pd 79 and 127 Pd 81 : Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure
Articolo
Data di Pubblicazione:
2019
Citazione:
New isomers in 125 Pd 79 and 127 Pd 81 : Competing proton and neutron excitations in neutron-rich palladium nuclides towards the N = 82 shell closure / H. Watanabe, H.K. Wang, G. Lorusso, S. Nishimura, Z.Y. Xu, T. Sumikama, P.-. Soderstrom, P. Doornenbal, F. Browne, G. Gey, H.S. Jung, J. Taprogge, Z. Vajta, J. Wu, A. Yagi, H. Baba, G. Benzoni, K.Y. Chae, F.C.L. Crespi, N. Fukuda, R. Gernhauser, N. Inabe, T. Isobe, A. Jungclaus, D. Kameda, G.D. Kim, Y.K. Kim, I. Kojouharov, F.G. Kondev, T. Kubo, N. Kurz, Y.K. Kwon, G.J. Lane, Z. Li, C.-. Moon, A. Montaner-Piza, K. Moschner, F. Naqvi, M. Niikura, H. Nishibata, D. Nishimura, A. Odahara, R. Orlandi, Z. Patel, Z. Podolyak, H. Sakurai, H. Schaffner, G.S. Simpson, K. Steiger, Y. Sun, H. Suzuki, H. Takeda, A. Wendt, K. Yoshinaga. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 792(2019 May), pp. 263-268. [10.1016/j.physletb.2019.03.053]
Abstract:
The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in 125 Pd 79 and 127 Pd 81 studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity 238 U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 + ) and (19/2 + ) in 125 Pd and 127 Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus 132 Sn.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
H. Watanabe, H.K. Wang, G. Lorusso, S. Nishimura, Z.Y. Xu, T. Sumikama, P.-. Soderstrom, P. Doornenbal, F. Browne, G. Gey, H.S. Jung, J. Taprogge, Z. Vajta, J. Wu, A. Yagi, H. Baba, G. Benzoni, K.Y. Chae, F.C.L. Crespi, N. Fukuda, R. Gernhauser, N. Inabe, T. Isobe, A. Jungclaus, D. Kameda, G.D. Kim, Y.K. Kim, I. Kojouharov, F.G. Kondev, T. Kubo, N. Kurz, Y.K. Kwon, G.J. Lane, Z. Li, C.-. Moon, A. Montaner-Piza, K. Moschner, F. Naqvi, M. Niikura, H. Nishibata, D. Nishimura, A. Odahara, R. Orlandi, Z. Patel, Z. Podolyak, H. Sakurai, H. Schaffner, G.S. Simpson, K. Steiger, Y. Sun, H. Suzuki, H. Takeda, A. Wendt, K. Yoshinaga
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