RESUMO
The calibration of low energy X-ray experimental setup with strongly filtered beam dedicated to radiobiological research was performed using the absorbed dose calculated from the data collected by two types detectors. For this purpose a semiconductor (Amptek, USA) and a thermoluminescent (Institute of Nuclear Physics, Krakow, Poland) detectors were applied. The absorbed dose in water values estimated by both detectors are in good agreement.
Assuntos
Imagens de Fantasmas , Semicondutores/normas , Dosimetria Termoluminescente/instrumentação , Dosimetria Termoluminescente/normas , Carga Corporal (Radioterapia) , Calibragem , Humanos , Método de Monte Carlo , Eficiência Biológica Relativa , Dosimetria Termoluminescente/métodos , Raios XAssuntos
Disciplinas das Ciências Biológicas/economia , Disciplinas das Ciências Biológicas/organização & administração , Comportamento Cooperativo , Indústria Farmacêutica/economia , Indústria Farmacêutica/organização & administração , Disseminação de Informação , Difusão de Inovações , Aprovação de Drogas/legislação & jurisprudência , Descoberta de Drogas/economia , Descoberta de Drogas/organização & administração , Humanos , Japão , Parcerias Público-Privadas , Semicondutores/economia , Semicondutores/normas , Estados Unidos , United States Food and Drug Administration/legislação & jurisprudência , Universidades/economia , Universidades/organização & administraçãoRESUMO
Swiss national requirements for measuring radon gas exposures demand a lower detection limit of 50 kBq h m(-3), representing the Swiss concentration average of 70 Bq m(-3) over a 1-month period. A solid-state nuclear track detector (SSNTD) system (Politrack, Mi.am s.r.l., Italy) has been acquired to fulfil these requirements. This work was aimed at the calibration of the Politrack system with traceability to international standards and the development of a procedure to check the stability of the system. A total of 275 SSNTDs was exposed to 11 different radon exposures in the radon chamber of the Secondary Calibration Laboratory at the Paul Scherrer Institute, Switzerland. The exposures ranged from 50 to 15000 kBq h m(-3). For each exposure of 20 detectors, 5 SSNTDs were used to monitor possible background exposures during transport and storage. The response curve and the calibration factor of the whole system were determined using a Monte Carlo fitting procedure. A device to produce CR39 samples with a reference number of tracks using a (241)Am source was developed for checking the long-term stability of the Politrack system. The characteristic limits for the detection of a possible system drift were determined following ISO Standard 11929.