@article{Vega-Carrillo_Benites-Rengifo_Hernandez-Davila_Ortiz-Rotriguez_De Leon-Martinez_2016, title={NaI(Tl) Scintillator’s Response Functions for Point-like and Distributed Gamma-ray Sources }, volume={4}, url={https://jnp.chitkara.edu.in/index.php/jnp/article/view/115}, DOI={10.15415/jnp.2016.41013}, abstractNote={<p>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 point-like 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.</p>}, number={1}, journal={Journal of Nuclear Physics, Material Sciences, Radiation and Applications}, author={Vega-Carrillo, H. R. and Benites-Rengifo, J. L. and Hernandez-Davila, V. M. and Ortiz-Rotriguez, J. M. and De Leon-Martinez, H. A.}, year={2016}, month={Aug.}, pages={129–137} }