Home / Store / Journals / Electronic Articles / Nuclear Technology / Volume 144 / Number 1
Alessandro Dodaro, Franco Vittorio Frazzoli, Romolo Remetti
Volume 144 / Number 1 / October 2003 / Pages 130-140
Format:electronic copy (download)
The "angular scanning" method allows both localization of hot spot(s) and the evaluation of the corresponding activity. Taking into account the experimental setup parameters (e.g., drum geometry, drum-detector distance, collimator geometry, etc.), the peak count rate versus the angular displacement is modeled as a theoretical analytical function of three independent variables (unknowns) for each hot spot: the two coordinates of the hot-spot center of mass and the corresponding activity value. Solutions for unknowns are obtained from equating, for each angular displacement, the experimental count rate to the corresponding theoretical one. Such a procedure has been applied to the SRWGA gamma scanner of the Casaccia Research Center utilizing a set of Waste Packages Reference Standards (with different matrices) where the gamma sources in different radial-azimuthal positions can be located.
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