Search Results

You are looking at 1 - 3 of 3 items for

  • Author or Editor: T. Żółtowski x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract  

The computational method for the rapid evaluation of gamma and X-ray spectra observed by semiconductor detectors in radiometric analysis in presented using a simple peak shape function. The computer programme includes a minimizing routine based on the modified Newton-Raphson method giving a minimized vector of the parameters more rapidly than the conventional approach. The spectra of some gamma-ray emitting fission products and X-ray spectra excited by radioisotopes of materials from copper ore processing were studied. It was found that the simple Gaussian peak function gives the results equivalent to the total peak area method.

Restricted access
Journal of Radioanalytical and Nuclear Chemistry
Authors: J. Parus, W. Ratynski, T. Zółtowski, J. Tys, J. Kierzek, E. Cieślak, and J. Kownacki
Restricted access

Abstract  

The selection of exciting source both from the point of view of excitation efficiency and elimination of matrix effects using incoherently scattered radiation from the analyzed sample is discussed. Samples of materials from the flotation process of copper ore have been used and copper, iron and lead were the elements sought. For the excitation of fluorescence X-rays, sealed radioisotopic sources of238Pu,241Am,244Cm,109Cd and a molybdenum X-ray tube were used. For X-ray analysis a Si(Li) spectrometer was applied. The processing of X-ray spectra based on the application of the Gaussian peak representation gives results equivalent to the total peak area method. From the intensities of fluorescence and scattered radiation, the contents of elements were calculated using empirical formulae and the results were compared with those of the Heinrich-Rasberry method. A statistical analysis of the results has been carried out and the criteria of optimal regression formula selection are given.

Restricted access