HIGH-RESOLUTION STUDY OF THE BETA-DECAY OF TI-41

An improved high-resolution study of the beta decay of Ti-41, produced in the Ca-40(He-3,2n) reaction at 40 MeV, has been performed at the I on Guide Isotope Separator On-Line (IGISOL) facility. The beta-delayed radiation was detected by a low-energy charged-particle detector and a large Ge detector for gamma rays. The experimental beta-decay streng th and its distribution, extracted from delayed-proton data, are compa red with results of shell-model calculations in the sdfp space. The lo west J(pi) 3(+)/2, T = 3/2 state in (41) Sc, the isobaric analogue sta te of the Ti-41 ground state, is estimated to contain 10% isospin impu rity. (C) 1997 Elsevier Science B.V.