Light collection behaviour of scintillators with different surface coverings

On the necessity of light transport simulation in scintillators

“…The wavelength-dependent attenuation length, L(l), is calculated by a simple importance sampling using both emission and absorption curves of a given scintillator, described in Ref. [11]. But, however, in this approach, the calculated attenuation curve is depended on the experimental emission and absorption curves, whereas, in a different approach, the attenuation curve can be derived using the models which are based only on the physical properties of the scintillator [14].…”

“…The wavelength-dependent version of the code was introduced in 2006 [11]. In the next section, a review on some outstanding results of PHOTRACK and comparisons with the experimental and calculational data are undertaken.…”

“…In a different verification of the PHOTRACK code, the scintillator-lightguide assembly used by Kilvington et al was modeled by the wavelength-dependent version of PHOTRACK [11]. They used a 2 in diameter by 1 in high scintillator attached with different sizes of lightguides (2,4,8,16 and 32 in).…”

A sensitivity analysis approach to optical parameters of scintillation detectors

“…Those photons produced within the overlap region have certain probabilities to be absorbed by the scintillator itself (selfabsorption). The probability curve for those wavelengths satisfying the attenuation condition will follow a simple exponential decay function [8]. When the light photons reach the photosensitive surface of the photomultiplier, depending on what wavelengths they have, some are converted to photoelectrons according to a wavelengthdependent probability function called the quantum efficiency (QE).…”

“…The above parameters were used in the Monte Carlo modelling and the results were compared with the measurements undertaken by Kilvington et al [9] as benchmark for the extended (wavelength-dependent) version of PHOTRACK, representing a very good agreement [8]. …”