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SUMMARY:Bingchen He (UTK): Shell evolution beyond 132Sn: Is 140Sn doubly m
 agic?
DTSTART:20260824T175000Z
DTEND:20260824T184000Z
DTSTAMP:20260901T120500Z
UID:indico-event-455@indico.phys.utk.edu
DESCRIPTION:Whether Sn140 exhibits a neutron shell closure at (N=90) remai
 ns theoretically unsettled. We investigate its structure using the chiral 
 1.8/2.0 (EM) interaction with coupled-cluster and in-medium similarity ren
 ormalization group methods. After validating our framework against the low
 -lying spectrum of Sn133\, we compute the first 2+ state in Sn140. Both me
 thods predict a low excitation of energy\, below 1.5 MeV. The resulting en
 ergy is small\, and this contradicts the assumption of the neutron N=90 sh
 ell closure.\n\nhttps://indico.phys.utk.edu/event/455/
LOCATION:604 (Nielsen)
URL:https://indico.phys.utk.edu/event/455/
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