PT Journal
AU AGATA Collaboration (Siciliano, Mea
   Gadea, A
   Perez-Vidal, RM
   Domingo-Pardo, C
TI Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in Sn-106,Sn-108
SO Physics Letters B
JI Phys. Lett. B
PY 2020
BP 135474
EP 7pp
VL 806
DI 10.1016/j.physletb.2020.135474
LA English
DE Lifetime; Nuclear structure; Multi-nucleon transfer; Light Sn; Tracking array
AB The lifetimes of the low-lying excited states 2(+) and 4(+) have been directly measured in the neutron-deficient Sn-106,Sn-108 isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted gamma rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2; 2(1)(+) -> 0(g.s)(+)) values and it describes well the experimental pattern for Sn104-114 ; the B(E2;(+)(4) -> 2(1)(+)) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in Sn-108.
ER