45Sc(α,d)47Ti reaction
Abstract
Using a split-pole magnetic spectrograph, the 45Sc(α,d)47Ti reaction was studied at E(α)=25 Mev and with a range of angles from 7° to 50°. These measurements are compared with results we obtained using the 45Sc(3He,p)47Ti reaction. One result of this comparison is the identification of candidates for states with high spin. The major emphasis of this paper is the study of such states. Two-particle spectroscopic amplitudes are calculated using an (f72)7 model, assuming an inert 40Ca core. Zero-range distorted-wave Born-approximation calculations are then performed with these amplitudes. A comparison between these shell-model calculations and the experimental results indicates that the states at 4.506 and 3.583 MeV have Jπ's of 19/2- and 17/2-. A second result of the comparison between the (α,d) and (3He,p) reactions concerns the nature of the 3.22-MeV state in 47Ti. It is strongly populated with an orbital angular momentum transfer of 0 by the (3He,p) reaction and only weakly populated by the (α,d) reaction, suggesting that it is formed by the transfer of a neutron-proton pair with S=0, T=1. This is similar to the transfer forming the state at 7.346 MeV, the analog of the 47Sc ground state. NUCLEAR REACTIONS 45Sc(α,d), E=25 MeV; measured σ(θ). 47Ti deduced levels, J, π. Shell model and DWBA analyses.
- Publication:
-
Physical Review C
- Pub Date:
- May 1976
- DOI:
- 10.1103/PhysRevC.13.1874
- Bibcode:
- 1976PhRvC..13.1874H