Excitation functions of proton-induced reactions on ^natFe and enriched ⁵⁷Fe with particular reference to the production of ⁵⁷Co

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• 作者：M. Al-Abyad ; M.N.H. Comsan ; S.M. Qaim
• 关键词：Natural and enriched iron targets ; Radionuclide ⁵⁷Co ; Nuclear reaction ; Excitation function ; Nuclear model calculation
• 刊名：Applied Radiation and Isotopes
• 出版年：2009
• 出版时间：January 2009
• 年：2009
• 卷：67
• 期：1
• 页码：122-128
• 全文大小：867 K

文摘

Excitation functions of the reactions ^natFe(p,xn)^55,56,57,58Co, ^natFe(p,x)⁵¹Cr, ^natFe(p,x)⁵⁴Mn, ⁵⁷Fe(p,n)⁵⁷Co and ⁵⁷Fe(p,α)⁵⁴Mn were measured from their respective thresholds up to 18.5 MeV, with particular emphasis on data for the production of the radionuclide ⁵⁷Co (T_1/2=271.8 d). The conventional stacked-foil technique was used, and the samples for irradiation were prepared by an electroplating or sedimentation process. The measured excitation curves were compared with the data available in the literature as well as with results of nuclear model calculations. From the experimental data, the theoretical yields of the investigated radionuclides were calculated as a function of the proton energy. Over the energy range E_p=15→5 MeV the calculated yield of ⁵⁷Co from the ⁵⁷Fe(p,n)⁵⁷Co process amounts to 1.2 MBq/μA h and from the ^natFe(p,xn)⁵⁷Co reaction to 0.025 MBq/μA h. The radionuclidic impurity levels are discussed. Use of highly enriched ⁵⁷Fe as target material would lead to formation of high-purity ⁵⁷Co.