Garrett, PaulWu, FrankAndreoiu, Corina2026-01-262026-01-262025Wu, F., Andreoiu, C., Karayonchev, V., Petrache, C.M., Régis, J.M., Esmaylzadeh, A., Michelagnoli, C., Beuschlein, M., Spagnoletti, P., Colombi, G. and Daugas, J.M., 2025. Towards lifetime measurement of excited states in 120Sn using thermal neutron capture. Nuclear Physics A, 1060, p.123105.https://doi.org/10.1016/j.nuclphysa.2025.123105https://hdl.handle.net/10566/21853The intruder bands in Sn isotopes, based on the 2p-2h excitation across the Z=50 proton shell gap, are well-known to exhibit shape coexistence near the neutron mid-shell region. The spectroscopic signatures are enhanced E0 transitions between the 0+ band heads and enhanced E2 transitions within rotational bands built on these 0+ band heads. However, lifetime information for the excited 0+ states is incomplete. Experimental details for the neutron-capture reaction and analysis procedures are described, and the first result of the 21+ lifetime demonstrates proper calibration of the setup.en120SnFast-timingLaBr3(Ce)Lifetime measurementsNeutron captureArticle