An identification and activity evaluation of the predominant gamma-emitting radionuclides in activated parts of a medical cyclotron plant by high resolution gamma-ray spectrometry were performed. The use of LaBr3:Ce scintillation and HPGe detectors was examined in order to solve the measurement problems due to high activity of some components used inside a plant provided with an IBA CYCLONE 18/9 cyclotron. For each component, the identification of some key-radionuclides allows to evaluate the surface dose behaviour as function of decay time. The largest activity values are related to radionuclides with half-life of 70-80 days, while radionuclides with higher half-lives represent less than 10 per cent of the total activity. The surface dose rate will be reduced to about 1/1000 of the starting value after a decay period of approximately 3 years, with a relatively safety at product disposal work.

Guarino, P., Rizzo, S., Tomarchio, E.A. (2008). Measurement of activity of the predominant gamma-emitting radionuclides in activated components of a medical cyclotron plan. In Proceedings of IRPA12- 12th International Congress of the International Radiation Protection Association. Buenos Aires : IRPA.

Measurement of activity of the predominant gamma-emitting radionuclides in activated components of a medical cyclotron plan

GUARINO, Pietro;RIZZO, Salvatore;TOMARCHIO, Elio Angelo
2008-01-01

Abstract

An identification and activity evaluation of the predominant gamma-emitting radionuclides in activated parts of a medical cyclotron plant by high resolution gamma-ray spectrometry were performed. The use of LaBr3:Ce scintillation and HPGe detectors was examined in order to solve the measurement problems due to high activity of some components used inside a plant provided with an IBA CYCLONE 18/9 cyclotron. For each component, the identification of some key-radionuclides allows to evaluate the surface dose behaviour as function of decay time. The largest activity values are related to radionuclides with half-life of 70-80 days, while radionuclides with higher half-lives represent less than 10 per cent of the total activity. The surface dose rate will be reduced to about 1/1000 of the starting value after a decay period of approximately 3 years, with a relatively safety at product disposal work.
Settore ING-IND/20 - Misure E Strumentazione Nucleari
19-ott-2008
IRPA12- 12th International Congress of the International Radiation Protection Association,
Buenos Aires (ARG)
19-24 October 2008
2008
00
http://www.irpa12.org.ar/fullpapers/FP2893.pdf
Guarino, P., Rizzo, S., Tomarchio, E.A. (2008). Measurement of activity of the predominant gamma-emitting radionuclides in activated components of a medical cyclotron plan. In Proceedings of IRPA12- 12th International Congress of the International Radiation Protection Association. Buenos Aires : IRPA.
Proceedings (atti dei congressi)
Guarino, P; Rizzo, S; Tomarchio, EA
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/48653
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