Variations in the charge radii of indium isotopes between N = 52 and 82

Le résumé fourni par la source

Measurements of the 5 p P 3 / 2 2 → 9 s S 1 / 2 2 and 5 p P 1 / 2 2 → 8 s S 1 / 2 2 transitions in the indium atom, combined with new atomic physics calculations, were used to extract the changes in mean-square nuclear charge radii, δ 〈 r 2 〉 , of the indium ( Z = 49 ) isotopes In 101 – 111 , In 113 – 123 , and In 125 – 131 . With a proton hole in the closed nuclear shell of Z = 50 , indium provides a detailed study of the effect of unpaired nucleons adjacent to the proton-shell closure, allowing investigation into the charge radii for isotopes between the two major neutron-shell closures at N = 50 and N = 82 . A study of the variations in charge radii between neighboring isotopes with neutron number (the ‘odd-even staggering') is presented and provides further insight and challenges for the theoretical description of the size of proton-hole nuclei. Two nuclear theories, density functional theory and the valence-space in-medium similarity renormalization group method, were employed to interpret the data. The new information obtained in this work provides valuable insights into the successes and shortcomings of the theoretical approaches employed.

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