Half-life of the I-pi=4(-) Intruder State in P-34 Using LaBr3:Ce Fast Timing

Abstract

The half-life of the I-pi = 4(-) intruder state at 2305 keV in P-34(15)19 has been measured using gamma-ray coincident fast timing with LaBr3:Ce scintillation detectors. Excited states in P-34 were populated in the O-18(O-18,pn)P-34 reaction at a beam energy of 36 MeV at the Tandem Laboratory at the National Institute of Physics and Nuclear Engineering, Bucharest, Romania. A half-life of t(1/2) similar to 2 ns was obtained for the 4(-) state, giving an M2 reduced transition probability consistent with similar transitions in this mass region and confirming the intruder-parity nature of the state.