학술논문
Study of the long-lived excited state in the neutron deficient nuclides $^{195,197,199}$Po by precision mass measurement
Document Type
Working Paper
Author
Althubiti, N. A.; Atanasov, D.; Blaum, K.; Cocolios, T. E.; Goodacre, T. Day; Farooq-Smith, G. J.; Fedorov, D. V.; Fedosseev, V. N.; George, S.; Herfurth, F.; Heyde, K.; Kreim, S.; Lunney, D.; Lynch, K. M.; Manea, V.; Marsh, B. A.; Neidherr, D.; Rosenbusch, M.; Rossel, R. E.; Rothe, S.; Schweikhard, L.; Seliverstov, M. D.; Welker, A.; Wienholtz, F.; Wolf, R. N.; Zuber, K.
Source
Phys. Rev. C 96, 044325 (2017)
Subject
Language
Abstract
Direct mass measurements of the low-spin $3/2^{(-)}$ and high-spin $13/2^{(+)}$ states in the neutron-deficient isotopes $^{195}$Po, $^{197}$Po, and high-spin $13/2^{(+)}$ state in $^{199}$Po 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 $\nu$i$_{13/2}$ orbital in $^{195,197}$Po. Additionally, the excitation energy of isomeric states of lead, radon, and radium isotopes in this region were obtained from $\alpha$-decay chains. The new excitation energies complete the knowledge of the energy systematics in the region and confirm for the first time that the $13/2^{(+)}$ states remain isomeric, independent of the number of valence neutrons.