Elsevier

Nuclear Physics A

Volume 187, Issue 3, 12 June 1972, Pages 577-592
Nuclear Physics A

Experimental studies of the 209Bi(p, n)209Po(IAS) reaction

https://doi.org/10.1016/0375-9474(72)90682-3Get rights and content

Abstract

Relative neutron angular distributions have been measured for the 209Bi(p, n)209Po(IAS) charge-exchange reaction at 28, 35 and 45 MeV bombarding energies using a p̃-n timing technique. In the distorted-wave Born approximation the complex form factor extracted from the isospin-dependent part of the Becchetti-Greenlees optical-model potential gave excellent fits to the shapes of the (p, n)IAS angular distributions. The proton decay (p̃) of the IAS correlated to neutron angle was measured to be isotropic at 28 and 35 MeV, supporting the assumption that the (p, n)IAS reaction is pure charge-exchange in nature. The (p, np̃) non-coincidence excitation function was measured from threshold to 44 MeV. A broad structure a few MeV above threshold and a decreasing cross section at higher energies were observed. The DWBA calculations did not fit this excitation function.

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

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