High-spin states inTi.

TheSc( α, p γ) reaction has been investigated at E=11, 12 and 13MeV. The γ-decay of 198 levels inTi up to 8,323 keV excitation energy has been observed. High-spin states were investigated by proton- γ ray angular correlation measurements at E=11 and 13MeV and by DSAM lifetime measurements at E=11 MeV. From the combined evidence spin (-parity) assignments were obtained for the levels at E=8,323 keV ( J= 10,8,6), 8,091(12, 10, 8, 6), 7,668(10, 8), 7,427(9, 7), 7,374(11, 9, 7), 6,906(10, 8, 6), 6,172(8,6), 6,102(10,8), 6,039(6), 6,034(9, 7), 5,630(7), 5,197(8), 5,169(7), 5,155(5), 4,404(5), 4,398(6) and 4,046keV (5). Most of the ambiguous spin assignments become unique if the 8,091 keV level has J=12, an assumption which is favoured by its excitation function. The level spectrum thus obtained is well reproduced by shell model calculations in the pure ( f) configuration space. Discrepancies exist in the reproduction of γ-decay modes. The reason is found in low-lying high-spin intruder states which include the 7,427 and 8,323 keV levels. The spectrum of negative-parity states is understood qualitatively by a comparison withTi andCa. [ABSTRACT FROM AUTHOR]