| Popis: |
The 20,21,22 Ne( 6 Li, d) 24,25,26 Mg 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 16 O( 6 Li, d) result. Strengths calculated using eigen-functions determined in large shell-model computations agree well with pure symmetry SU(3) predictions. The 21 Ne( 6 Li, d) angular distributions for transitions to the ground-state band of 25 Mg 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 24 Mg, a two-step calculation gives a better account of the data than does a compound nuclear calculation. |
