Photofission of 197Au and 209Bi at intermediate energies

Autor: Hiroshi Matsumura, H. Haba, Kohshin Washiyama, Yasuji Oura, M Kasaoka, S. Shibata, Koh Sakamoto, I. Fujiwara, M. Furukawa, M. Igarashi
Rok vydání: 2003
Předmět:
Zdroj: Czechoslovak Journal of Physics. 53:A265-A271
ISSN: 1572-9486
0011-4626
DOI: 10.1007/s10582-003-0034-7
Popis: Recoil properties and yields of radionuclides formed in the photofission of 197Au and 209Bi by bremsstrahlung of end-point energies (E0) from 300 to 1100 MeV have been investigated using the thick-target thick-catcher method. The kinetic energies T of the residual nuclei were deduced based on the two-step vector model and discussed by comparing with the reported results on protoninduced reactions as well as those on photospallation. The charge distribution was reproduced by a Gaussian function with the most probable charge Zp expressed by a linera function of the product mass number A and with the A-independent width FWHMCD. Based on the charge distribution parameters, the symmetric mass yield distribution with the most probable mass Ap of 92 m.u. and the width FWHMMD of 39 m.u. was obtained for 197Au at E0≥600 MeV. The Ap value for 209Bi was larger by 4 m.u. than that for 197Au and the FWHMMD was smaller by 6 m.u. A comparison with the calculations using the Photon-induced Intranuclear Cascade Analysis 3 code combined with the Generalized Evaporation Model code (PICA3/GEM) was also performed.
Databáze: OpenAIRE
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