Phys.Rev. C 88, 051301 (2013)

V.M.Bader, A.Gade, D.Weisshaar, B.A.Brown, T.Baugher, D.Bazin, J.S.Berryman, A.Ekstrom, M.Hjorth-Jensen, S.R.Stroberg, W.B.Walters, K.Wimmer, R.Winkler

Quadrupole collectivity in neutron-deficient Sn nuclei: ¹⁰⁴Sn and the role of proton excitations

NUCLEAR REACTIONS ¹⁹⁷Au(¹⁰⁴Sn, ¹⁰⁴Sn'), (¹⁰²Cd, ¹⁰²Cd'), [¹⁰²Cd, ¹⁰⁴Sn secondary beams from ⁹Be(¹²⁴Xe, X), E=140 MeV/nucleon primary reaction], E=67 MeV/nucleon for ¹⁰⁴Sn and 64 MeV/nucleon for ¹⁰²Cd; measured scattered particle spectra, Eγ, Iγ, (particle)γ-coin using A1900 fragment separator, Si p-i-n detector and TOF for particles and CAESAR array of scintillation detectors for γ rays at NSCL-MSU facility. ¹⁰⁴Sn; deduced level, B(E2) for first 2+ state relative to that for ¹⁰²Cd. Comparison with previous experimental results, and with large-scale shell model calculations. Enhanced quadrupole collectivity. Systematics of B(E2) values for A=104 to 130 even-A Sn nuclei.

doi: 10.1103/PhysRevC.88.051301