Reduction in nuclear size and quadrupole deformation of high-spin isomers of 127,129In

2025/05/20 by Vernon, A. R., Binnersley, C. L., Ruiz, R. F. Garcia +29 · 1 citation
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2505.14977

Abstract

We employed laser spectroscopy of atomic transitions to measure the nuclear charge radii and electromagnetic properties of the high-spin isomeric states in neutron-rich indium isotopes (Z = 49) near the closed proton and neutron shells at Z = 50 and N = 82. Our data reveal a reduction in the nuclear charge radius and intrinsic quadrupole moment when protons and neutrons are fully aligned in 129In(N = 80), to form the high spin isomer. Such a reduction is not observed in 127In(N = 78), where more complex configurations can be formed by the existence of four neutron-holes. These observations are not consistently described by nuclear theory.

Citations

• The NUBASE2020 evaluation of nuclear physics properties *
• Nucleus-Dependent Valence-Space Approach to Nuclear Structure
• Improved nuclear matter calculations from chiral low-momentum interactions
• The AME 2020 atomic mass evaluation (II). Tables, graphs and references*

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• Commissioning the Resonance ionization Spectroscopy Experiment at FRIB

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