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Multi-particle Photonuclear Reactions behind Giant Dipole Resonance
A. N. Ermakov,,I. V. Makarenko,V. N. Orlin,B. S. Ishkhanov,I. M. Kapitonov 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Experimental data on yields of multi-particle photonuclear reactions (involving the emission of up to seven neutrons from the nucleus involved) on ^(197)Au, ^(203,205)Tl, and ^(209)Bi nuclei in the region extending from the giant dipole resonance to an energy of 67.7 MeV are presented. These data are compared with the results of modern theoretical calculations that take into account both the excitation of a giant dipole resonance (GDR) in a nucleus and the photodisintegration of quasideutrons (QD) in it. By and large, experimental data conrm the results of theoretical calculations - that is, only upon taking simultaneously into account both alternative photodisintegration mechanisms (GDR excitation and QD photodisintegration) can one describe these experimental data. The contribution of QD photodisintegration grows with increasing photon energy and neutron multiplicity and becomes dominant for reactions with the emission of not less than five neutrons from the nucleus being considered.