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      Nuclear aspects and cyclotron production of the positron emitter 55Co Translated title: Kerntechnische Aspekte und Zyklotron Erzeugung des Positronenemitters 55Co

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      Kerntechnik
      Carl Hanser Verlag

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          Abstract

          The radionuclide 55Co (T 1/2 = 17.5 h, E β+ = 1.5 MeV, 76% β + decay) is an important β + emitting radioisotope. For production of 55Co via natFe( p, xn) 55Co reaction, an iron layer was deposited on a copper substrate by means of electro-deposition method which could be irradiated by 29.5 MeV protons at 100 μA. No-carrier-added (n.c.a.) 55Co was separated from the iron target via an anion exchange column (Dowex 1 · 8). The achieved production yield was 31.25 MBq/μAh. Also, excitation functions for the 55Co radionuclide via natFe(p, xn) 55Co, 56Fe(p, 2n) 55Co and 54Fe(d, n) 55Co reactions were calculated by TALYS-1.4 code and TENDL-2011 database and compared with previous published data.

          Kurzfassung

          Das Radionuklid 55Co (T 1/2 = 17.5 h, E β+ = 1.5 MeV, 76% β + Zerfall) ist ein wichtiges β + emittierendes Radioisotop. Zur Erzeugung von 55Co durch die Reaktion natFe( p, xn) 55Co, wurde eine Eisenschicht mit Hilfe der Elektrodeposition auf einem Kupfersubstrat abgeschieden, das mit 29.5 MeV Protonen bei 100 μA bestrahlt wurde. Trägerarmes 55Co wurde von dem Eisentarget separiert durch eine Anionenaustauschersäule (Dowex 1 · 8). Die erreichte Produktionsausbeute lag bei 31.25 MBq/μAh. Die Anregungsfunktionen für 55Co via natFe(p, xn) 55Co, 56Fe(p, 2n) 55Co und 54Fe(d, n) 55Co-Reaktionen wurden mit Hilfe des TALYS-1.4 Codes und der TENDL-2011 Databasis berechnet und mit bereits veröffentlichten Daten verglichen.

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

          Excitation functions of the reactions (nat)Fe(p,xn)(55,56,57,58)Co, (nat)Fe(p,x)(51)Cr, (nat)Fe(p,x)(54)Mn, (57)Fe(p,n)(57)Co and (57)Fe(p,alpha)(54)Mn were measured from their respective thresholds up to 18.5MeV, with particular emphasis on data for the production of the radionuclide (57)Co (T(1/2)=271.8d). 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-->5MeV the calculated yield of (57)Co from the (57)Fe(p,n)(57)Co process amounts to 1.2MBq/microAh and from the (nat)Fe(p,xn)(57)Co reaction to 0.025MBq/microAh. The radionuclidic impurity levels are discussed. Use of highly enriched (57)Fe as target material would lead to formation of high-purity (57)Co.
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            Nuclear model calculation on charged particle induced reactions to produce 85 Sr for diagnostic and endotherapy

            85 Sr, having a half-life of 64.8 d, is an important radionuclide in nuclear medicine diagnostic and endotherapy. The ALICE/ASH code was used to calculate excitation functions for proton, alpha and deuteron induced on various targets that lead to the production of 85 Sr radioisotopes using intermediate energy accelerators. Recommended thickness of the targets according to SRIM code was premeditated. The application of those data, particularly in the calculation of integral yields, is discussed and theoretical integral yields for different reactions were computed. To consider precision of ALICE/ASH code calculations, experimental excitation functions in several decay channels was compared with ALICE/ASH code data. The 85 Rb(p, n) 85 Sr process was determined as most interesting one due to radionuclidic purity. The ALICE/ASH code predicts a maximum cross-section of about 798 mb at 11 MeV for this reaction.
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              Production of 55Co via the 54Fe(d,n)-process and excitation functions of 54Fe(d,t)53Fe and 54Fe(d,α)52mMn reactions from threshold up to 13.8 MeV

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                Author and article information

                Journal
                kt
                Kerntechnik
                Carl Hanser Verlag
                0932-3902
                2195-8580
                28 June 2013
                : 78
                : 3
                : 204-208
                Affiliations
                1 Motahareh Talebi and Teyeb Kakavand, Physics Faculty, Zanjan University, P.O. Box: 451-313, Zanjan, Iran
                2 Mohammad Mirzaii, Agricultural, Medical and Industrial Research School, Nuclear Science and Technology Research Institute, P.O. Box: 31485/498, Karaj, Iran
                Author notes
                Article
                KT110296
                10.3139/124.110296
                f904475a-1fb3-4b01-ac5a-089f025a8020
                © 2013, Carl Hanser Verlag, München
                History
                : 4 September 2012
                Page count
                References: 42, Pages: 5
                Categories
                Technical Contributions/Fachbeiträge

                Materials technology,Materials for energy,Nuclear physics
                Materials technology, Materials for energy, Nuclear physics

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