Elsevier

Nuclear Physics A

Volume 132, Issue 2, 28 July 1969, Pages 385-409
Nuclear Physics A

A calculation of the continuum state and nuclear photo-effect

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Abstract

A photo-effect mechanism in the energy region including the giant resonance is investigated by means of a model calculation. The calculation of the final states is performed, keeping a close relation with the conventional shell-model calculation. For this purpose, the configuration space is divided into two regions by a closed surface which is chosen in such a way that the interactions between the nucleons in the outside region, in fact, can be regarded as negligible except for the Coulomb force. For the wave function in the inside region, a trial function with unknown parameters is assumed and these parameters are determined by means of a variational principle. This method is useful for calculating not only the continuum state but also the bound state. 16O photodisintegration is taken as an example to interprete our model. A comparison of our results with experiments is made for the excitation function, angular distribution and polarization.

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    This work has been partially supported by The Institute for Nuclear Study, University of Tokyo.

    The author would like to express his sincere thanks to Professor M. Kobayashi who stimulated the interest in low-energy nuclear physics, for his continuous encouragement. He wishes to thank Professor T. Ohmura, Professor K. Izumo, Dr. M. Ichimura, Dr. B. Imanishi and Mr. M. Kamimura for valuable discussions and Professor O. Hara and other members of the theoretical high energy nuclear physics group in Nihon University for their interest in this work. He acknowledges the help of Mr. M. Hatchya and Dr. B. Imanishi in use of electronic computers.

    ∗∗

    The author is also thankful to Nihon Gakujutsu Shinkokai for granting a fellowship and to Professor M. Kimura for his hospitality during the stay in Tohoku University.

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