학술논문
Shell evolution beyond Z=28 and N=50: Spectroscopy of 81,82,83,84Zn
Document Type
article
Author
C.M. Shand; Zs. Podolyák; M. Górska; P. Doornenbal; A. Obertelli; F. Nowacki; T. Otsuka; K. Sieja; J.A. Tostevin; Y. Tsunoda; G. Authelet; H. Baba; D. Calvet; A. Château; S. Chen; A. Corsi; A. Delbart; J.M. Gheller; A. Giganon; A. Gillibert; T. Isobe; V. Lapoux; M. Matsushita; S. Momiyama; T. Motobayashi; M. Niikura; H. Otsu; N. Paul; C. Péron; A. Peyaud; E.C. Pollacco; J.-Y. Roussé; H. Sakurai; C. Santamaria; M. Sasano; Y. Shiga; D. Steppenbeck; S. Takeuchi; R. Taniuchi; T. Uesaka; H. Wang; K. Yoneda; T. Ando; T. Arici; A. Blazhev; F. Browne; A.M. Bruce; R.J. Carroll; L.X. Chung; M.L. Cortés; M. Dewald; B. Ding; Zs. Dombrádi; F. Flavigny; S. Franchoo; F. Giacoppo; A. Gottardo; K. Hadyńska-Klęk; A. Jungclaus; Z. Korkulu; S. Koyama; Y. Kubota; J. Lee; M. Lettmann; B.D. Linh; J. Liu; Z. Liu; C. Lizarazo; C. Louchart; R. Lozeva; K. Matsui; T. Miyazaki; K. Moschner; M. Nagamine; N. Nakatsuka; S. Nishimura; C.R. Nita; C.R. Nobs; L. Olivier; S. Ota; R. Orlandi; Z. Patel; P.H. Regan; M. Rudigier; E. Şahin; T. Saito; P.-A. Söderström; I. Stefan; T. Sumikama; D. Suzuki; Zs. Vajta; V. Vaquero; V. Werner; K. Wimmer; J. Wu; Z.Y. Xu
Source
Physics Letters B, Vol 773, Iss , Pp 492-497 (2017)
Subject
Language
English
ISSN
0370-2693
Abstract
We report on the measurement of new low-lying states in the neutron-rich 81,82,83,84Zn nuclei via in-beam γ-ray spectroscopy. These include the 41+→21+ transition in 82Zn, the 21+→0g.s.+ and 41+→21+ transitions in 84Zn, and low-lying states in 81,83Zn were observed for the first time. The reduced E(21+) energies and increased E(41+)/E(2+1) ratios at N=52, 54 compared to those in 80Zn attest that the magicity is confined to the neutron number N=50 only. The deduced level schemes are compared to three state-of-the-art shell model calculations and a good agreement is observed with all three calculations. The newly observed 2+ and 4+ levels in 84Zn suggest the onset of deformation towards heavier Zn isotopes, which has been incorporated by taking into account the upper sdg orbitals in the Ni78-II and the PFSDG-U models.