EXPERIMENTAL DETERMINATION OF DOSE CONVERSION COEFFICIENTS FOR EXTERNAL RADIATION EXPOSURE WITH GAMMA EMITTING RADIONUCLIDES

• Main Author: C. Bernhardsson
• Format: Article
• Language: English
• Published: Saint-Petersburg Research Institute of Radiation Hygiene after Professor P.V. Ramzaev 2015-08-01
• Series: Radiacionnaâ Gigiena
• Subjects: внешнее облучение; коэффициенты перехода; эффективная доза; геометрии облучения фантома
• Online Access: https://www.radhyg.ru/jour/article/view/30

In the present paper an Alderson RANDO phantom have been used to experimentally determine conversion coefficients for external exposure. A limited number of exposure situations were investigated: rotational geometry with different radiation point sources (99mTc, 131I+133Ba, 137Cs, 60Co), APand PA-geometry with 137Cs and a special pocket-geometry with 137Cs. All experiments were carried out on a large open field to avoid scattering effects from walls and roof. The established conversion coefficients are a first step to later determine more conversion coefficients for more complex exposure situations. The coefficients presented here may therefore be used directly or as a comparison to Monte Carlo simulated values of the same exposure situations.