Towards a proper modeling of detector and source characteristics in Monte Carlo simulations

Calibration of the Absolute Efficiency of Well-Type NaI(Tl) Scintillation Detector in 0.121–1.408 MeV Energy Range

“…However, the MC simulations consider the detailed characteristics of the source-to-detector system in calculating the photopeak efficiency. This approach (MC) is inadequate in its accuracy because of the inaccuracy in the parameters accompanying the detector's geometrical dimensions and the structure of the sample [2]. The accuracy is also affected by the uncertainty in nuclear data and the calculation uncertainties of the MC code [3], but these are likely to be as important as the parameters linked with the detector's geometrical dimensions and the material composition of the sample.…”

A detailed investigation of HPGe detector response for improved Monte Carlo efficiency calculations

“…Clearly, the attenuation in such a thin layer is negligible for most of the energies. Hardy et al [11] adjust this thickness to 26 experimental data for very low energies. For higher energies, the thickness of the dead layer at the inner n+ contact will still affect the efficiency due to its effect on the active volume.…”

“…Therefore, another approach for adjusting the efficiency of the Monte Carlo simulations to match experimental values is tweaking the dimensions of the crystal itself [12,[14][15][16]21,[25][26][27][28]. Alternatively, the uncertainty in the physical dimensions of the crystal can be reduced by radiography of the detector.…”

Calibration of a portable HPGe detector using MCNP code for the determination of 137Cs in soils

“…A series of measurements were carried out placing the sources corresponding to single-line emitters at different distances along the detector axis and perpendicular to it. Various detector parameters were modified in order to obtain a better agreement between experimental and calculated efficiencies following the procedure described in García-Talavera et al (2000). In Table 1 the results obtained for the 137 Cs efficiencies are presented.…”