Abstract
Analytic expressions for first-order stripping amplitudes, using Coulomb waves for the description of relative motions in both entrance and exit channels are obtained. The initial bound state (i.e., the projectile) is assumed to be asymptotic, having a wave function of the form e/sup - alpha r/r. The final bound state (i.e., the resultant nucleus) may be taken to have a wave function of the Hulthen shape (e/sup - BETA r/-e/sup - BETA 'r)/r. The cross sections predicted by these distorted wave expressions are compared to the predictions of analogous plane wave amplitudes. It is found that the angular distributions are qualitatively indistinguishable for a large range of parameters, including even severe distortions. The magnitudes of the predicted cross sections, however, are much smaller than the magnitudes predicted by plane wave expressions and are much closer to measurements. A fit to data for the /sup 6/Li(/sup 3/He,p)/sup 8/*Be (16.63 Mev) reaction is given, involving a reduced width as the only parameter. At 2.6 Mev bombarding energy, the plane wave theory gives an answer which differs by factors such as 24 at forward angles and 36 at backward anglcs. (auth)
Published Version
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