Sensitivity Analysis of calibration methods and factors effecting the statistical nature of radiation measurement

TL;DR

This paper evaluates calibration methods for radiation detectors, demonstrating that the CLT method provides optimal calibration and highlighting the importance of counting time for measurement accuracy.

Contribution

It introduces a comparative analysis of calibration techniques, establishing the CLT method as superior and emphasizing the role of counting time in calibration precision.

Findings

CLT method is the most optimal calibration approach.

Averaging results yields more accurate data than mode or median.

Counting time significantly impacts calibration accuracy.

Abstract

Scintillator detectors electronics is recalibrated against the datasheet given by the manufacturer. Optimal and mutual dependent values of (a) high voltage at PMT (Photomultiplier Tube), (b) amplifier gain, (c) average time to count the radiation particles (set by operator), and (d) number of instances/sample number are estimated. Total 5: two versions of Central Limit Theorem (CLT), (3) industry preferred Pulse Width Saturation, (4) calibration based on MPPC coupled Gamma-ray detector and (5) gross method are used. It is shown that CLT method is the most optimal method to calibrate detector and its respective electronics couple. An inverse modeling-based Computerized Tomography method is used for verification. It is shown that statistically averaging results are more accurate and precise data than mode and median, if the data is not skewed and random number of samples are used during the calibration process. It is also shown that the average time to count the radiation particle is the most important parameter affecting the optimal calibration setting for precision and accurate measurements of gamma radiation.