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  • Author or Editor: L. Górski x
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Abstract  

The cross-sections for the production of the short-lived nuclides:26mAl,197mAu,136mBa,79mBr,139mCe,34Cl,167mEr,114m3In,114m2In,38mK,38mCl,26Na,20F,192Re,207mPb,203mPb,46mSc,183mW,90mZr obtained from (n, 2n), (n, n′), (n, alpha), (n,p) reactions using 14 MeV neutrons, were evaluated by the activation method. The experimental results of this work were compared with those obtained by other authors.

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Abstract  

Mathematical considerations on the optimization of the flow and mechanical parameters of a system for continuous analysis of liquids are presented. The system in question contains a pump, an activation vessel placed in the vicinity of a neutron generator target, a pipeline and a vessel for the measurement of the induced activity. The following parameters of the system were taken into consideration: volumes of the activation and measurement vessels, position of the activation vessel with respect to the neutron generator target, shape of the activation vessel, and flow rate of the pumped fluid. The system is adapted for continuous and interrupted mode of operation of the neutron generator. The results of the theoretical considerations were verified in practice with the use of the above system and the reaction16O (n, p)16N. The agreement of theory and experiment was proved.

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Abstract  

The extraction of HNO3, TcO 4 , and Pd by solutions of dibutyl N,N-diethylcarbamoylmethylenephosphonate (DBDECMP) and dibutyl N,N-diethylcarbamoylphosphonate (DBDECP) in CCl4 has been studied. At low aqueous acidities, HNO3 is extracted by both extractants (S) as HNO3·S and HNO3·S2, at >1M HNO3 only HNO3·S is formed. The distribution of TcO 4 and Pd(II) is nearly independent of HNO3 concentration. A second power dependence on extractant concentration was found for the extraction of Pd(II) by DBDECMP and TcO 4 by DBDECP, and a 4th power dependence for TcO 4 -DBDECMP.

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