Detailed spectroscopy of doubly magic 132^{132}Sn

Collaboration
Jul 6, 2020
18 pages
Published in:
  • Phys.Rev.C 102 (2020) 1, 014328
  • Published: Jul 30, 2020
e-Print:

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Abstract: (APS)
The structure of the doubly magic Sn8250132 has been investigated at the ISOLDE facility at CERN, populated both by the β−decay of In132 and β−-delayed neutron emission of In133. The level scheme of Sn132 is greatly expanded with the addition of 68 γ transitions and 17 levels observed for the first time in the β decay. The information on the excited structure is completed by new γ transitions and states populated in the β-n decay of In133. Improved delayed neutron emission probabilities are obtained both for In132 and In133. Level lifetimes are measured via the advanced time-delayed βγγ(t) fast-timing method. An interpretation of the level structure is given based on the experimental findings and the particle-hole configurations arising from core excitations both from the N = 82 and Z = 50 shells, leading to positive- and negative-parity particle-hole multiplets. The experimental information provides new data to challenge the theoretical description of Sn132.
Note:
  • 19 pages, 11 figures. Accepted for publication in Phys. Rev. C
  • Nuclear Structure