The reaction "S("N, pny)"Ti has been studied with a view to populating high spin states in ""Ti. In singles and y-y coincidence experiments y-ray transitions in the ground state band and a negative parity band are seen and three levels connected to the ground state band, at 6508, 7671, and 8040 keV, are inferred. Angular distributions are consistent with stretched cascades. The lifetime of the 7671-keV level, presumed 10+, has been determined by the attenuated Doppler-shift method to be 2.7~0.5 ps. A comparison of the present reaction with the recently reported Si(' F, p2ny) Ti reaction is made and a method for predicting the propensity of these types of reaction to feed high spin states is proposed. An (fp)' shell model calculation of yrast levels up to J 12 has been made.NUCLEAR REACTIONS 32S(~4N, Pny), E =26-43 MeV; measured y-y coin and o(E); +Ti deduced levels; measured 8'(0&), Doppler-shift attenuation; deduced J", Tf /2 Natural targets, Ge(Li) detectors.

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The reaction 28 Si( 14 N,/my) 40 Ca has been used to populate high-spin states in 40 Ca, and levels at 6930 and 8098 keV are identified as the 6 + and 8 + yrast states. The results suggest the termination at spin 8 of the band based on the 3.35-MeV state. The previously identified level at 6930 keV is found to be a doublet.The softness of the doubly magic 40 Ca nucleus to particle-hole excitations has been used to explain the nature of the first excited 0 + state at 3.35 MeV, which is interpreted as the lowest member of a 4p-4h (four particle, four hole) prolate rotational band. 1 The experimental evidence for such a band is primarily the energies of the lowest 2 + and 4 + states, which fit reasonably well a J(J + 1) spacing from the excited 0 + state, and the enhanced E2 transitions between these states. 2 It is of crucial importance for the understanding of the 40 Ca spectrum and hence of other/-/)-shell nuclei to test this interpretation by locating the higher-spin members of this band. We have located two states which we suggest are the 6 + and 8 + yrast states. The location of the proposed 8 + state and the small E2 enhancement of its decay to the proposed 6 + state indicate that the rotational model ceases to be applicable at spin 8.The "grazing-collision" picture of Klapdor et at. 3 suggested that 28 Si( 14 N, pny) 40 C2L at an incident laboratory energy of 30-40 MeV would feed highspin states in 40 Ca. The experimental procedures were similar to those used in other heavy-ion reactions in this mass region, 4 " 6 We have measured y-ray excitation functions and y-ray angular distributions (which also permit observation of Doppler shifts). To identify 40 Cay rays, ayy coincidence experiment was performed with a 35-MeV 14 N beam incident on a silicon chip. Ad-200 100 0 200| IOO o: M^dhAtiMMt^iMi \mi)kxMUt GATE-1169 (8 + -6 + ) J*kmJi& MH,,^M*mUM-.,

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