Lifetime and γ-ray angular distribution measurements for low-lying levels in 45Ti

Abstract The decay modes, lifetimes and spins of low-lying levels in 45 Ti have been investigated via the 45 Sc(p, nγ) 45 Ti reaction. The mean lifetimes of the 1353, 1468 and 1521 keV levels were found to be 146±24, 670 +164 −120 and 79±13 fs respectively, by the technique of attenuated Doppler shifts. Lower limits of 1000 fs were set for the levels at 330, 744 and 1226 keV. Angular distributions of de-excitation γ-rays have been measured and compared with theoretical predictions of the compound nucleus statistical model to give spin assignments. From data obtained here and in previous experiments spins and parities were deduced for levels at 40 ( 7 2 − , 9 2 − ), 1353 ( 9 2 − ) and 1468 ( 11 2 − ) keV .