Elsevier

Nuclear Physics

Volume 63, Issue 3, March 1965, Pages 438-448
Nuclear Physics

Some excitation functions of neutron induced reactions in the energy range 12.6–19.6 MeV

https://doi.org/10.1016/0029-5582(65)90474-8Get rights and content

Abstract

Excitation functions of neutron induced reactions were measured in the energy range 12.6–19.6 MeV by means of the activation method. Results for the following reactions are reported: (n, 2n) reaction in N14, F19, K39, Ga69 and Sr88, (n, p) reaction in F19 and Zn66 and (n, α) reaction in Mn55.

The results are compared with corresponding measurements published by other authors. In the case of the heavier target elements a comparison is also made with the predictions of the statistical theory using compound nucleus cross sections evaluated in the optical model and applying the level density formula given by Lang. Gamma emission as a competing process in the decay of the compound nucleus is also taken into account. The agreement of the theoretical predictions with the experimental results is poor. This, probably, is caused mainly by the level density parameters.

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    1

    We would like to thank Professor H. Neuert and Professor G. Süβmann for their interest in this work and their encouragement.

    We also wish to thank the Van de Graaff group of the II. Institut für Experimentalphysik, Hamburg, and Dr. S. Skorka for making the facilities of the generator available and for the assistance during the measurements.

    The calculations could be done on the SIEMENS 2002 computer at the Institut für Angewandte Mathematik, Mainz and on the IBM 7090 computer at the Deutsches Rechenzentrum, Darmstadt; these possibilities are gratefully acknowledged.

    This work was supported in part by the Bundesministerium für wissenschaftliche Forschung and the Deutsche Forschungsgemeinschaft.

    Present address: Institute for Theoretical Physics, Copenhagen.

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