Physics Letters B (Jun 2022)

Electromagnetic moments of scandium isotopes and N = 28 isotones in the distinctive 0f7/2 orbit

  • S.W. Bai,
  • Á. Koszorús,
  • B.S. Hu,
  • X.F. Yang,
  • J. Billowes,
  • C.L. Binnersley,
  • M.L. Bissell,
  • K. Blaum,
  • P. Campbell,
  • B. Cheal,
  • T.E. Cocolios,
  • R.P. de Groote,
  • C.S. Devlin,
  • K.T. Flanagan,
  • R.F. Garcia Ruiz,
  • H. Heylen,
  • J.D. Holt,
  • A. Kanellakopoulos,
  • J. Krämer,
  • V. Lagaki,
  • B. Maaß,
  • S. Malbrunot-Ettenauer,
  • T. Miyagi,
  • R. Neugart,
  • G. Neyens,
  • W. Nörtershäuser,
  • L.V. Rodríguez,
  • F. Sommer,
  • A.R. Vernon,
  • S.J. Wang,
  • X.B. Wang,
  • S.G. Wilkins,
  • Z.Y. Xu,
  • C.X. Yuan

Journal volume & issue
Vol. 829
p. 137064

Abstract

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The electric quadrupole moment of 49Sc was measured by collinear laser spectroscopy at CERN-ISOLDE to be Qs=−0.159(8) eb, and a nearly tenfold improvement in precision was reached for the electromagnetic moments of 47,49Sc. The single-particle behavior and nucleon-nucleon correlations are investigated with the electromagnetic moments of Z=21 isotopes and N=28 isotones as valence neutrons and protons fill the distinctive 0f7/2 orbit, respectively, located between magic numbers, 20 and 28. The experimental data are interpreted with shell-model calculations using an effective interaction, and ab-initio valence-space in-medium similarity renormalization group calculations based on chiral interactions. These results highlight the sensitivity of nuclear electromagnetic moments to different types of nucleon-nucleon correlations, and establish an important benchmark for further developments of theoretical calculations.

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