Lifetime measurements for levesl in 30P between 3.7 and 4.7 MeV excitation energy

The mean lifetimes of nine levels in 30P, between 3.7 and 4.7 MeV excitation energy, have been measured using the Doppler shift attenuation method. A limit has also been placed on the lifetime of one further level. Three of these lifetimes have not previously been measured, these are 40+or-30 fs, 180-50+60 fs and 185+or-15 fs for the 4225, 4298 and 4343 keV levels respectively. A doublet has been found at 4229.9+or-1.3 keV and 4234.5+or-1.8 keV where only a single level had been previously reported. The measured lifetimes give transition strengths which lead to spin assignments of 2+ and 3 for the 3834 and 3927 keV levels respectively.