Gamma-ray spectra of a 20-h source containing mCi activity were measured with a 25% Ge detector and a low-energy photon spectrometer (LEPS). Gamma lines with intensities as low as per decay were observed. Gamma-gamma coincidence spectra of a sample were measured with the GAMMASPHERE array. A comparison of the -ray spectrum gated by the Cf x-ray peak with the -singles spectrum provided spins of the excited states in The -ray data, in conjunction with previously measured reaction data, allowed us to characterize several single-particle and vibrational states above the subshell gap.
- Received 25 August 2000
- Published 25 October 2000
© 2000 The American Physical Society