Abstract
The g factor of the first 2 + state of radioactive 76 Kr ( T 1/2 =14.8 h) has been measured, extending the systematics of the previously measured stable 78, 80, 82, 84, 86 Kr isotopes. The measurement was performed with a radioactive 76 Kr ion beam applying projectile Coulomb excitation in inverse kinematics combined with the transient magnetic field technique. The 76 Kr beam was produced and accelerated in batch mode (re-cyclotron method) at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron. A total of three production and acceleration cycles yielded six hours of beam on target with peak rates of 10 8 particles/s. About 5.6×10 4 particle- γ coincidence events were recorded. The g factor g( 76 Kr ;2 + 1 )=+0.37(11) was obtained by direct comparison to the known g( 78 Kr ;2 + 1 ) value re-measured immediately after the 76 Kr runs with the same setup and under almost identical kinematic conditions.
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