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Journal of Radioanalytical and Nuclear Chemistry
Authors:
L. Desdín García
,
G. Capote Rodríguez
,
A. Leyva Fabelo
, and
L. Calderín Hidalgo

Abstract  

This paper shows the influence of hardness on the beta backscattering coefficient from heat treated and plastic deformed carbon steel specimens. The observed effect cannot be explained as a change in the chemical composition of the sample (or effective atomic number). In order to explain the observed dependencies, it is necessary to take into account the structural defect and morphological changes of the different phases.

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Abstract  

Se in Ni and Co concentration in concentrates obtained from the nickel industry has to be determined for quality control requirements in their commercialization. Analysis of Se at minor and trace levels is relatively complicated and destructive procedures are frequently required. In this work the determination of Se by epithemal neutron activation analysis (ENAA) in 17 samples from Cuban nickel industry was investigated. Application of ENAA allowed nondestructive determination of Se concentration down to ppm level in spite of the presence of high Co, Fe, Ni and Cr contents in the samples. For attenuation of the thermal neutron flux a Cd filter was utilized.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
G. Capote Rodriguez
,
R. Padilla Alvarez
,
G. Pérez Zayas
,
A. Hernández Rivero
,
M. López Reyes
,
S. Ribeiro Guevara
, and
J. Molina Insfrán

Abstract  

Thirty elements were determined by INAA in Cuban soil samples collected in 17 zones from western regions of Cuba, which were affected by neuropathy epidemic in 1992. The presence of toxic elements was evaluated to provide data for the analysis of possible paths of intoxication through local agriculture product consumption. The results obtained for As, Th and U are compared with similar data reported on literature.

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