Summary
Noting the difference between the proton-neutron pair in the nucleus and deuteron, the cross-section for absorption of the photon by all the proton-neutron pairs is calculated. Photonuclear interaction is taken to be of the classical type so as to mark the connection of the high-energy nuclear photoeffect with the low-energy. The calculation is performed taking the Pauli principle into consideration both in the initial and the final states. The dependence of the cross-section on the short range correlation between the nucleons in the nucleus is carefully discussed. It also is shown in detail how the cross-section varies with the photon energy. There should be found a notable characteristic which suggests the range of validity of the quasi-deuteron model for nuclear photo-disintegration.
Riassunto
Prendendo nota della differenza fra la coppia protone-neutrone nel nucleo e nel deutone, si calcola la sezione d’urto per l’assorbimento del fotone da parte di tutte le coppie protone-neutrone. Si considera l’interazione fotonucleare di tipo classico in modo da notare la connessione del fotoeffetto nucleare di alta energia con quello di bassa energia. Si effettua il calcolo prendendo in considerazione il principio di Pauli sia nello stato iniziale che nel finale. Si discute minutamente le dipendenza della sezione d’urto dalla correlazione di corto range fra i nucleoni nel nucleo. Si mostra anche come varia la sezione d’urto con l’energia del fotone. Dovrebbe risultare una notevole caratteristica che suggerisca il range di validità del modello del quasi-deutone nella fotodisinte-grazione nucleare.
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Fujii, S. Note on the quasi-deuteron model for nuclear photo-disintegration. Nuovo Cim 25, 995–1007 (1962). https://doi.org/10.1007/BF02733724
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DOI: https://doi.org/10.1007/BF02733724