Shape coexistence in the neutron-deficient isotope 187Tl
A triple shape coexistence manifests in 188Pb via the presence of three characteristic isomers, and the observation of two isomers in 187Tl with microsecond lifetimes and energies comparable to those in 188Pb was the main motivation behind this new study. A heavy-ion fusion evaporation reaction involving a nanosecond-pulsed 154 MeV 32S beam incident on a 159Tb target was used to populate excited states in 187Tl, observed via time-correlated gamma-ray spectroscopy with Gammasphere. Subsequent...[Show more]
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