Theoretical and empirical status of the two-deuteron-alpha-particle vertex

Publisher Website
Google Scholar
Abstract
The two-deuteron-alpha-particle overlap, including its D-wave component, is evaluated in the case of realistic two- and four-body wavefunctions. The deduced theoretical D2(d, alpha ) value is compared with improved empirical estimates of D2(d, alpha ) based upon DWBA analyses of (d, alpha ) reactions in the sd shell and which incorporate the best available shell-model information for the nuclear states involved. The theoretical and empirical values of this analysis are in agreement and yield a value D2(d, alpha ) approximately=-0.1 fm2. This value differs substantially from other recent empirical estimates, D2(d, alpha )=-0.3 fm2, obtained from (d, alpha ) reactions upon heavier target nuclei and from simple theoretical estimates which make use of a point-deuteron approximation.