Abstract

The problem of two-particle units and sum rules in two-neutron transfer reactions is discussed. Using (t, p) data on 16O, 40Ca, 48Ca, 118Sn, 204Pb, 206Pb, 207Pb and 208Pb targets and available model wave functions, a universal value of the absolute normalization factor D02 is obtained. Utilizing this value the adequacy of the shell-model subspace used in generating the wave functions is studied. With the aid of conveniently defined two-particle units in terms of D02, enhancement factors are calculated for all transitions analyzed, and a quantitative definition of enhanced cross sections is obtained. The relation between the two-particle units introduced here and the Weisskopf units used in connection with electromagnetic reduced transition probabilities is pointed out.

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