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

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30324

Borgmann,  Christopher
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30312

Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30319

Böhm,  Christine
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30722

Kreim,  Susanne
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Stanja, J., Borgmann, C., Agramunt, J., Algora, A., Beck, D., Blaum, K., et al. (2013). Mass spectrometry and decay spectroscopy of isomers across the Z = 82 shell closure. Physical Review C, 88(5): 054304. doi:10.1103/PhysRevC.88.054304.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-9E2D-1
Zusammenfassung
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 Eex (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.