IN-BEAM GAMMA-RAY SPECTROSCOPY OF CL-40

The structure of the neutron-rich (T(z) = 3) nucleus Cl-40 is investig ated by measuring alpha-p-gamma-gamma and alpha-p-n-gamma-gamma coinci dences using the heavy-ion fusion-evaporation reaction Be-9(S-36, alph ap)Cl-40. A total of 18 in-beam transitions in Cl-40 are identified an d a level scheme is constructed up to spin (8-) and 4.087 MeV excitati on energy. The experimental results are discussed in the context of pr evious work and compared to shell-model predictions. Excitation energi es of the negative parity yrast states and relative electromagnetic tr ansition strengths obtained from calculations based on the full (2s,1d )21(1f2p)3 configuration space are in good agreement with the experime ntal results.