Determination of LaBr3(Ce) internal background using a HPGe detector and Monte Carlo simulations
Anna Camp1, Arturo Vargas1, José M Fernández-Varea2
1Institute of Energy Technologies (INTE), Universitat Politècnica de Catalunya, Diagonal 647, E-08028 Barcelona, Spain.
Abstract:
The presence of (138)La and (227)Ac impurities in LaBr3(Ce) scintillator crystals is a drawback for their use in environmental radiation monitoring. A method is presented to evaluate the internal (138)La activity. Firstly, an experimental set-up is prepared with the LaBr3(Ce) crystal acting as the radiation source and an HPGe detector that acquires the photon spectrum. Then, the internal background spectrum is simulated with a modified version of the PENELOPE/penEasy Monte Carlo code. The simulated spectra agree with measurements conducted at ultra-low-background facilities.
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