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a-cluster states in Ti have been investigated in the Ca ( Li,d ) Ti reaction at E= 50 MeV. The angular distributions of 34 levels at excitation energies for E"=O -13 MeV allow us to analyze the data. The angular distributions of positive-parity members of the ground-state band (the K =0+ band) in Ti were well reproduced by the finite-range distorted-wave Born approximation calculations up to the transferred angular momentum of L= 8. For the members of the negative-parity band (the E =0 band) with the primary quantum number N=13, three levels at 6.22, 7.34, and 9.43 MeV were identified as the 1, 3, and 5 states, respectively. The existence of a negativeparity band in Ti has been investigated for a long time and persistently gives considerable support to a-cluster models for nuclei heavier than A =40.

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Coincidence measurement was made in the reaction "Ca("Ne, "Oaj at 260 MeV incident energy, and the experimental results were analyzed in terms of the projectile breakup scheme. The reaction can be conveniently classified into the elasticand inelastic-breakup processes. Comparison of. the present results to those of the "0singles measurement indicates the importance of the process in which the breakup is followed by the fusion process. Theoretical analysis shows that the main aspects of the present experimental results are explained. NUCLEAR REACTIONS 4 Ca(Ne, On) E= 260 MeV measured coincidence en-t ergy and angular correlations. Deduce reaction mechanisms. Calculations of elastic breakup and breakup-fusion processes.