Phys.Rev.Lett. 131, 022502 (2023)

L.Nies, D.Atanasov, M.Athanasakis-Kaklamanakis, M.Au, K.Blaum, J.Dobaczewski, B.S.Hu, J.D.Holt, J.Karthein, I.Kulikov, Y.A.Litvinov, D.Lunney, V.Manea, T.Miyagi, M.Mougeot, L.Schweikhard, A.Schwenk, K.Sieja, F.Wienholtz

Isomeric Excitation Energy for ⁹⁹In^m from Mass Spectrometry Reveals Constant Trend Next to Doubly Magic ¹⁰⁰Sn

ATOMIC MASSES ^99,100,101In; measured TOF; deduced mass excess, excitation energies. The ISOLTRAP mass spectrometer at ISOLDE/CERN.

RADIOACTIVITY ⁹⁹In(IT); measured decay products; deduced excitation energy with small uncertainty, intriguing constancy of the isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. Comparison with large-scale shell model, ab initio, and density functional theory calculations.

doi: 10.1103/PhysRevLett.131.022502