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Joakim

Joakim Cederkäll

Professor

Joakim

Spectroscopy of 98Cd by two-nucleon removal from 100In

Author

  • S. Y. Jin
  • S. T. Wang
  • J. Lee
  • A. Corsi
  • K. Wimmer
  • F. Browne
  • S. Chen
  • M. L. Cortés
  • P. Doornenbal
  • T. Koiwa
  • C. X. Yuan
  • A. Algora
  • D. Brugnara
  • Joakim Cederkäll
  • J. Gerl
  • M. Gorska
  • G. Häfner
  • K. Kokubun
  • P. Koseoglou
  • S. Kubono
  • P. Li
  • P Liang
  • J. Liu
  • Z. Liu
  • T. Lokotko
  • J. Park
  • H. Sakurai
  • Z. Y. Sun
  • R. Taniuchi
  • W. Xian
  • I. Zanon
  • Luis Sarmiento Pico
Show all

Summary, in English

Low-lying states of Cd-98 have been populated by the two-nucleon removal reaction (In-100, Cd-98+gamma) and studied using in-beam gamma-ray spectroscopy at the Radioactive Isotope Beam Factory at RIKEN. Two new gamma transitions were identified and assigned as decays from a previously unknown state. This state is suggested to be based on a pi 1g(/9/2)(-1)2p(1/2)(-2) configuration with J(pi) = 5(-). The present observation extends the systematics of the excitation energies of the first 5(-) state in N = 50 isotones toward Sn-100. The determined energy of the 5(- )state in Cd-98 continues a smooth trend along the N = 50 isotones. The systematics are compared with shell-model calculations in different model spaces. Good agreement is achieved when considering a model space consisting of the pi(1f(5/2), 2p(3/2), 2p(1/2), 1g(9/2)) orbitals. The calculations with a smaller model space omitting the orbitals below the Z = 38 subshell could not reproduce the experimental energy difference between the ground and first 5(-) states in N = 50 isotones, because proton excitations across Z = 38 subshell yield a large amount of correlation energy that lowers the ground states.

Department/s

  • Nuclear physics

Publishing year

2021-08-02

Language

English

Publication/Series

Physical Review C: covering nuclear physics

Volume

104

Issue

2

Document type

Journal article

Publisher

American Physical Society

Topic

  • Physical Sciences

Keywords

  • Level structure
  • Isotones
  • Isomer

Status

Published

ISBN/ISSN/Other

  • ISSN: 2469-9985