Elsevier

Nuclear Physics A

Volume 265, Issue 2, 19 July 1976, Pages 220-252
Nuclear Physics A

Experimental study of (f722)7+ states in s-d shell nuclei

https://doi.org/10.1016/0375-9474(76)90351-1Get rights and content

Abstract

The (α, d) reactions on 24, 26Mg, 28,30Si, 32,34S, 36,38,40Ar and 42Ca at beam energies from 34 to 40 MeV were performed to search for (f722)7+ levels in order to confirm and extend systematics observed by previous investigators. Supplementary (3He, p) experiments on 24Mg, 28Si and 32S were also performed. DWBA calculations proved quite useful in interpreting the experimental results. In addition, the 25Mg(α,t) and 27Al(α, 3He) experiments were conducted to further distinguish the (f7227+ states from (d52f72)6 levels in 26Al and 28Al. The latter states are expected to be populated with significant strength in (α, d) as are (f722)7+ states. A nearly linear dependence of the (α, d) Q-values to the 7+ states versus atomic mass holds for all the s-d shell nuclei studied here. This Q-value linearity ends as the f72 shell begins to fill although regularities are still apparent. A systematic and similar behavior of (d32)3+ states was also observed.

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    Supported in part by the National Science Foundation Grant No. MPS71-03445.

    ††

    Present address: Indiana University, Department of Physics, Bloomington, Indiana 47401

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