Optimization of the gamma-ray spectrometry counting time based on uncertainties of radionuclides concentration in samples | Zendy

Marcelo Bessa Nisti | Zendy; Marcelo Francis Máduar | Zendy; C. H. R. Saueia | Zendy; Fernanda Cavalcante | Zendy; B. P. Mazzilli | Zendy

Open Access

Optimization of the gamma-ray spectrometry counting time based on uncertainties of radionuclides concentration in samples

Author(s) -

Marcelo Bessa Nisti,

Marcelo Francis Máduar,

C. H. R. Saueia,

Fernanda Cavalcante,

B. P. Mazzilli

Publication year - 2020

Publication title -

brazilian journal of radiation sciences

Language(s) - English

Resource type - Journals

ISSN - 2319-0612

DOI - 10.15392/bjrs.v8i2.1197

Subject(s) - gamma ray spectrometry , radionuclide , mass spectrometry , gamma spectroscopy , semiconductor detector , detector , gamma ray , radiochemistry , microcomputer , germanium , physics , analytical chemistry (journal) , materials science , nuclear physics , chemistry , computer science , optics , chromatography , optoelectronics , silicon , telecommunications , chip , quantum mechanics

This paper aims to propose an easy and fast method of optimization of the gamma-ray spectrometry counting time in determining natural radionuclides (Pb-210, Pb-212, Pb-214, Bi-212, Bi-214 and Ac-228) in order to minimize uncertainties in the concentration. The samples were measured by gamma-ray spectrometry with a hyper-pure germanium detector Canberra, 25% relative efficiency, effective resolution of 1.9 keV on the 1332.5 keV 60Co with associated electronics and coupled to a microcomputer. Multichannel Maestro A65-I model was used for spectrum acquisition and peak net area determination, and WinnerGamma/Interwinner 6.01 software was used for gamma-ray spectra analysis and to calculate the concentrations and associated uncertainties. The counting times used were 86,000 s and 150,000 s.

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