In-beam γ-ray Spectroscopy of 30P via the 28Si(3He,pγ)30P Reaction

The level structure of 30P up to 8.25 MeV was investigated via in-beam γ-ray spectroscopy using the 28Si(3He,pγ)30P reaction at 9 MeV at the University of Tsukuba Tandem Accelerator Complex in Japan. An energy level scheme was deduced from γ-γ coincidence measurements. 47 new transitions have been observed from the previously known states (mostly resonances), thereby reducing the uncertainties in the excitation energies of 17 states from 3 to 10 keV to values of < 1 keV. Furthermore, spin assignments based on measurements of γ-ray angular distributions and γ-γ directional correlation of oriented nuclei (DCO ratios) were made for several observed levels of 30P.