Elsevier

Nuclear Physics A

Volume 344, Issue 1, 28 July 1980, Page 151
Nuclear Physics A

The role of the Coulomb interaction in isospin-violating direct nuclear reactions

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Abstract

We investigate possible sources of isospin mixing in direct nuclear reactions. We find that there are mainly two effects which enter coherently into the direct reaction amplitude : “induced isospin mixing” caused by the Coulomb interaction between the target and the projectile, and “wavefunction effects” of the target nuclear states. These arise mainly through the difference of corresponding neutron and proton single-particle wave functions. These differences are especially noticeable just in the surface region where direct reactions take place. As illustrative examples we perform model calculations for the pick-up reactions 13C(d, 3H)12C(1+, 15.11 MeV) and 13C(d, 3He)12Bg.s.(1+) and the inelastic scattering 12C(d, d′)12C leading to the 1+ states at 12.71 MeV and 15.11 MeV. These model calculations are compared with the corresponding experimental data.

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    Present address: Center for Nuclear Studies, University of Texas, Austin, Texas 78712, USA.

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