Bremsstrahlung-induced fission and spallation of the pre-actinide nucleus Ta-181

Author(s)

Deppman, A. ^[1] ; Karapetyan, G. S. ^[1] ; Guimaraes, V. ^[1] ; Gonzales, C. ^[1] ; Balabekyan, A. R. ^[2] ; Demekhina, N. A. ^{[3, 4]}

Affiliation

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Yerevan State Univ, Fac Phys, Yerevan 0025 - Armenia

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

^[4] Joint Inst Nucl Res, Flerov Lab Nucl React LNR, Dubna 141980, Moscow Region - Russia

• Document type: Journal article
• Source: Physical Review C; v. 91, n. 2 FEB 27 2015.
• Web of Science Citations: 3

Abstract

A study of photofission on Ta-181 induced by bremsstrahlung with endpoint energies of 50 and 3500 MeV has been performed. The fission yields have been measured by using the induced-activity method in an off-line analysis. The total photofission yields for the tantalum target at 50 and 3500 MeV are found to be 5.4 +/- 1.1 mu b/equivalent quanta per second (eq.q) and 0.77 +/- 0.11 mb/eq.q, respectively, and the corresponding deduced fissilities are (0.23 +/- 0.05) x 10(-3) and (2.9 +/- 0.5) x 10(-3). Mass- and charge-yield distributions were derived from the data. The results were compared with the simulated results from the CRISP code for multimodal fission by the assuming symmetrical fission mode. (AU)

• FAPESP's process: 14/00284-1 - Production of isomeric states in the deuteron-induced reaction of gold and lead at high-energies
• Grantee: Gayane Karapetyan
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• 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