Coulomb excitation of 68/28Ni40 at 'safe' energies

The B(E2; 0+ → 2+) value in 68Ni has been measured using Coulomb excitation at safe energies. The 68Ni radioactive beam was post-accelerated at the CERN on-line isotope mass separator (ISOLDE) facility to 2.9 MeV/u and directed to a 108Pd target. The emitted γ rays were detected by the MINIBALL detector array. Not only directly registered but also indirectly deduced information on the nucleus emitting the γ ray was used to perform the Doppler correction, leading to a larger center-of-mass angular range to infer the excitation cross section. The obtained value of 2.8(+1.2/−1.0) 10^2 e^2 fm^4 is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low 0+ → 2+ transition probability. 4 pages, 5 figures ispartof: Physical Review C, Nuclear physics vol:78 issue:4 pages:1-4 status: published