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

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

doi:10.1103/PhysRevC.88.054304

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

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

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

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

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

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http://link.aps.org/doi/10.1103/PhysRevC.88.054304
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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: https://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 nuclide¹⁹⁸At 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 E_ex (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.