Spectroscopy of the long-lived excited state in the neutron-deficient nuclides 195,197,199Po by precision mass measurements

© 2017 authors. Published by the American Physical Society. Direct mass measurements of the low-spin 3/2- and high-spin 13/2+ states in the neutron-deficient isotopes Po195 and Po197 were performed with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE-CERN. These measurements allow the determination of the excitation energy of the isomeric state arising from the νi13/2 orbital in Po195,197. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from α-decay chains. These excitation energies complete the knowledge of the energy systematics in the region and confirm that the 13/2+ states remain isomeric, independent of the number of valence neutrons.

Publication year:2017

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Authors:International

Authors from:Higher Education