Ground state moments and spins of neutron-rich K and Al isotopes as probes for changes in nuclear structure

International Symposium on Exotic Nuclear Structure From Nucleons 2012

Neyens, G.^1

KU Leuven, Instituut Voor Kern- en Stralingsfysica, B-3001 Heverlee, Belgium^1

关键词: Collinear laser spectroscopies;    Complementary methods;    Fragment separators;    Ground state wavefunctions;    Ground-state spins;    Island of inversion;    Neutron particles;    Quadrupole moments;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/445/1/012007/pdf
DOI  :  10.1088/1742-6596/445/1/012007

来源: IOP

【 摘 要 】

This contribution focusses on recent measurements of nuclear moments and spins using two complementary methods. The ground state magnetic moments and spins of the exotic isotopes49,51K have been measured at the ISOLDE facility at CERN using bunched-beam high-resolution collinear laser spectroscopy. The re-inversion of the ground state spin from I = 1/2 in47,49K back to the normal I = 3/2 in51K has been established. At GANIL (Caen, France) the quadrupole moment of the33Al ground state has been measured using the continuous-beam β-nuclear magnetic resonance method applied to a spin-polarized beam produced at the LISE fragment separator. The large value establishes a very mixed wave function with about equal amounts of normal and neutron particle-hole excited configurations contributing to its ground state wave function. This illustrates the transitional nature of isotopes at the border of the island-of-inversion.