Mass spectrometry and decay spectroscopy of isomers across the Z=82 shell closure

J. Stanja, Ch Borgmann, J. Agramunt, A. Algora, D. Beck, K. Blaum, Ch Böhm, M. Breitenfeldt, T. E. Cocolios, L. M. Fraile, F. Herfurth, A. Herlert, M. Kowalska, S. Kreim, D. Lunney, V. Manea, E. Minaya Ramirez, S. Naimi, D. Neidherr, M. RosenbuschL. Schweikhard, G. Simpson, F. Wienholtz, R. N. Wolf, K. Zuber

Research output: Contribution to journalArticle

15 Citations (Scopus)


Recent results from a measurement campaign studying the isomerism in neutron-deficient Tl isotopes are presented. The measurements make use of a nuclear spectroscopy setup coupled to the high-resolution Penning-trap mass spectrometer ISOLTRAP at CERN's radioactive ion-beam facility ISOLDE. The mass values of 190,194Tl are improved and a mass-spin-state assignment is carried out. An additional mass measurement of the grandparent nuclide 198At allows the deduction of the spin-state ordering in 190Tl. As a result, the excitation energies of the isomers in both Tl isotopes are determined for the first time to Eex(194Tl)=260(15) keV and E ex(190Tl)=89(12) keV. Furthermore, this allows anchoring of the ground-state and isomer masses of 194Bi, 202Fr, and 206Ac, which are linked by two independent α-decay chains.

Original languageEnglish
Article number054304
JournalPhysical Review C - Nuclear Physics
Issue number5
Publication statusPublished - Nov 6 2013


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Stanja, J., Borgmann, C., Agramunt, J., Algora, A., Beck, D., Blaum, K., Böhm, C., Breitenfeldt, M., Cocolios, T. E., Fraile, L. M., Herfurth, F., Herlert, A., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Minaya Ramirez, E., Naimi, S., Neidherr, D., ... Zuber, K. (2013). Mass spectrometry and decay spectroscopy of isomers across the Z=82 shell closure. Physical Review C - Nuclear Physics, 88(5), [054304].