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  • Author or Editor: F. Girardi x
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Abstract  

Cerenkov counting efficiencies for a large number of radionuclides formed by (n, γ) reactions and used in the field of activation analysis have been obtained by two different experimental procedures. A comparison between the Cerenkov counting technique and scintillation low-resolution gamma-ray spectrometry is also presented. Results are summarized in tables and briefly discussed.

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Abstract  

A method for the measurement of235U in dilute uranium solutions based on Cerenkov radiation is described. It is applicable to solutions treated in fuel element production where the enrichment factor of the uranium solution is to be known, thus to solutions of uranyl nitrate not containing other fission products.

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Abstract  

Three different computer systems for gamma-spectrometric data-handling have been developed at the Joint Nuclear Research Center of Ispra. The systems are: (1) batchwise treatment of the data with a large computer, (2) time-shared teleprocessing by means of a centralised computer, (3) use of a small computer at the laboratory site. The paper describes both hardware and software of the three systems with emphasis on their practical use and on advantages and disadvantages in routine application. A partial analysis of the running costs of the systems is also presented.

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Abstract  

Three different analytical techniques: INAA, X-ray fluorescence and atomic absorption spectrometry were used at the JRC Ispra to test the total homogeneity of four candidate botanic reference materials supplied by NBS. Without adopting complex statistical formalities a “degree of inhomogeneity” was estimated in each sample for the elements considered in the test. The operating procedures and the results obtained are presented and discussed.

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