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Title: NaI(Tl) Scintillator's Response Functions for Point-like and Distributed Gamma-ray Sources
Authors: Vega Carrillo, Héctor René
Benites Rengifo, Jorge Luís
Hernández Dávila, Víctor Martín
Ortíz Rodríguez, José Manuel
de León Martínez, Héctor Asael
Issue Date: Aug-2016
Publisher: Chitkara University
Abstract: The response functions of a NaI(Tl) detectors have been estimated using Monte Carlo methods. Response functions were calculated for monoenergetic photon sources (0.05 to 3 MeV). Responses were calculated for point-like sources and for sources distributed in Portland cement cylinders. Calculated responses were used to estimate the detector efficiency for pointlike and distributed sources. Samples of cylindrical Portland cement were prepared and exposed to the photoneutron field produced by a 15 MV linac used for radiotherapy. Short half-life radioisotopes were induced and the activity was determined by measuring the pulse-height spectra with a NaI(Tl) g-ray spectrometer that was calibrated using point-like sources. Instead of doing corrections due to differences between the geometry, material and solid angle of point-like sources used for calibration, and the Portland cement cylinders, the detection efficiency was determined using the ratio between the efficiencies for the point-like and the distributed sources estimated with the Monte Carlo calculations, and the activity of the induced isotopes in cement was obtained.
URI: http://localhost/xmlui/handle/20.500.11845/785
ISSN: 2321-8649
Other Identifiers: info:eu-repo/semantics/publishedVersion
Appears in Collections:*Documentos Académicos*-- UA Ciencias Nucleares

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