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

abstract

  • The excitation energy of the 1/2^{-} isomer in ^{99}In at N=50 is measured to be 671(37)keV and the mass uncertainty of the 9/2^{+} ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2^{-} 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. This trend is used to test large-scale shell model, abinitio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Nies, L., Atanasov, D., Athanasakis-Kaklamanakis, M., Au, M., Blaum, K., Dobaczewski, J., ... Wienholtz, F.

complete list of authors

  • Nies, L||Atanasov, D||Athanasakis-Kaklamanakis, M||Au, M||Blaum, K||Dobaczewski, J||Hu, BS||Holt, JD||Karthein, J||Kulikov, I||Litvinov, Yu A||Lunney, D||Manea, V||Miyagi, T||Mougeot, M||Schweikhard, L||Schwenk, A||Sieja, K||Wienholtz, F

publication date

  • July 2023