#### Abstract

α-cluster states in ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$ have been investigated in the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$${(}^{6}$Li,*d*${)}^{44}$Ti reaction at *E*=50 MeV. The angular distributions of 34 levels at excitation energies for ${\mathit{E}}_{\mathit{x}}$=0–13 MeV allow us to analyze the data. The angular distributions of positive-parity members of the ground-state band (the ${\mathit{K}}^{\mathrm{\pi}}$=${0}^{+}$ band) in ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$ 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 ${\mathit{K}}^{\mathrm{\pi}}$=${0}^{\mathrm{-}}$ band) with the primary quantum number *N*=13, three levels at 6.22, 7.34, and 9.43 MeV were identified as the ${1}^{\mathrm{-}}$, ${3}^{\mathrm{-}}$, and ${5}^{\mathrm{-}}$ states, respectively. The existence of a negative-parity band in ${}_{}{}^{44}{}_{}{}^{}\mathrm{Ti}$ has been investigated for a long time and persistently gives considerable support to α-cluster models for nuclei heavier than *A*=40.

- Received 30 May 1990

DOI:https://doi.org/10.1103/PhysRevC.42.1935

©1990 American Physical Society