Alpha particle spectroscopic strengths for levels populated in the 20,21,22Ne(6Li, d)24,25,26Mg reactions

N. Anantaraman, University of Rochester
H. E. Gove, University of Rochester
J. Toke, University of Rochester
J. P. Draayer, Louisiana State University


The 20,21,22Ne(6Li, d)24,25,26Mg reactions have been studied at a bombarding energy of 32 MeV. Alpha particle spectroscopic strengths have been extracted for several low-lying levels by a finite-range distorted wave analysis. These are compared with theoretical predictions. The agreement is good both for relative strengths to different levels within a nucleus and for ground-state strengths relative to the 16O(6Li, d) result. Strengths calculated using eigen-functions determined in large shell-model computations agree well with pure symmetry SU(3) predictions. The 21Ne(6Li, d) angular distributions for transitions to the ground-state band of 25Mg are characterized by the lower of the two L-transfers allowed for populating each level. For the 3+(5.24 MeV) unnatural parity level in 24Mg, a two-step calculation gives a better account of the data than does a compound nuclear calculation. © 1977.