Photofission of Th-232 and U-238 at intermediate energies

Author(s)

Deppman, A. ^[1] ; Andrade-, II, E. ^[2] ; Guimaraes, V. ^[2] ; Karapetyan, G. S. ^[2] ; Demekhina, N. A. ^{[3, 4]}

Affiliation

^[1] Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo - Brazil

^[2] Andrade-, E., II, Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo - Brazil

^[3] Yerevan Phys Inst, Yerevan 0036 - Armenia

^[4] JINR, Flerov Lab Nucl React LNR, Dubna 141980 - Russia

• Document type: Journal article
• Source: Physical Review C; v. 87, n. 5 MAY 6 2013.
• Web of Science Citations: 16

Abstract

In this work we present an analysis of the yields of fission fragments induced by bremsstrahlung photons with endpoint energies of 50 and 3500 MeV on Th-232 and U-238 targets using the simulation code CRISP. A multimodal fission option was added to this code and an extension of the calculation to the properties of the fission products is presented. By dividing the fissioning nuclei according to their fissionability, an approach is introduced which accounts for the contribution of symmetric and asymmetric fission. By adopting this procedure, it was possible to calculate the main parameters for the fission-fragment charge distribution such as the most-probable charge for a given fission product mass chain and its corresponding width parameter. Also, it was possible to reproduce features of fragment mass distribution and evaluate the fissility of fissioning nuclei for photon-induced fission of Th-232 and U-238. (AU)

• FAPESP's process: 11/00314-0 - Elastic scattering reactions and transfer induced by light exotic nuclei
• Grantee: Gayane Karapetyan
• Support Opportunities: Scholarships in Brazil - Post-Doctoral