A method for estimation of isotope yield in a thick target under photonuclear production

作者：Nikiforov V I; Uvarov V L^*

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2011, 269(24): 3149-3152.

DOI：10.1016/j.nimb.2011.04.102

• Isotope production
• Photonuclear reaction
• Electron accelerator
• Bremsstrahlung
• Target

A model for analytical description of high-energy Bremsstrahlung radiation and activation of the thick production target is presented. Simple formulas including limited number of testable radiation parameters and the excitation function in the Breit-Wigner form are derived for determining effective cross-section of photonuclear reaction and isotope yield. As an illustration, we consider the (48)Ti(gamma, p)(47)Sc, (68)Zn(gamma, p)(67)Cu, (100)Mo(gamma, n)(99)Mo, (112)Sn(gamma, p)(111)In, and (193)Ir(gamma, n)(192)Ir reactions that can be used for production of some medical isotopes. It has been shown that the values of the proportionality factor between peak and effective cross-sections for the reactions under study (in the range of target atomic number Z similar to 20-80) are adjacent for a specified endpoint energy of Bremsstrahlung spectrum in the range of practical interest 40-100 MeV. The obtained data on isotope yield are compared with experimental and simulation results.

• 出版日期2011-12-15