Production of actinium, thorium and radium isotopes from natural thorium irradiated with protons up to 141 MeV

S. V. Ermolaev; B. L. Zhuikov; V.M. Kokhanyuk; V. L. Matushko; Stepan N. Kalmykov; Ramiz A. Aliev; Ivan G. Tananaev; Boris F. Myasoedov

doi:10.1524/ract.2012.1909

Published by De Gruyter (O) January 19, 2012

Production of actinium, thorium and radium isotopes from natural thorium irradiated with protons up to 141 MeV

S. V. Ermolaev , B. L. Zhuikov , V.M. Kokhanyuk , V. L. Matushko , Stepan N. Kalmykov , Ramiz A. Aliev , Ivan G. Tananaev and Boris F. Myasoedov

From the journal Radiochimica Acta

https://doi.org/10.1524/ract.2012.1909

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Abstract

Cross sections of ²²⁵Ac, ²²⁷Ac, ²²⁷Th and ²²⁸Th in thorium-232 targets irradiated with protons in the energy range 21–141 MeV have been measured. Based on these data, production yields of ²²⁵Ac and ²²³Ra in thick thorium targets have been calculated. It is possible to produce in proton energy range 60–140 MeV about 96 GBq (2.6 Ci) ²²⁵Ac per 10-d irradiation with 100 μA proton beam current and 10-d decay, and much higher amount of ²²³Ra. The impurities of ²²⁷Ac and ²²⁴Ra are important and need to be assessed for further medical applications.

Keywords: 225Ac; 223Ra; thorium; proton induced reaction; cross section

^* Correspondence address: Institute for Nuclear Research of Russian Academy of Sciences, 60th October Anniversary Prospect 7a, Moscow 117312, Russische Föderation, ermolaev@inr.ru

Published Online: 2012-01-19

Published in Print: 2012-04

Production of actinium, thorium and radium isotopes from natural thorium irradiated with protons up to 141 MeV

Abstract

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