X-ray spectrum estimation from the transmission method using the radioluminescence of an Al2O3:C crystal

X-ray spectrum estimation from the transmission method using the radioluminescence of an Al2O3:C crystal

The X-ray spectrum of X-ray tube is crucial for radiation dose calculations. Due to the high photon flux, it is difficult to directly measure the primary spectrum of X-ray tube. Transmission measurement is one of indirect method used to determine the primary spectrum of X-ray tube. Although the meth...

Full description

Saved in:
Bibliographic Details
Main Authors: Rui Chen, Qingxian Zhang, Jian Zhang, Liangquan Ge, Yi Gu, Rui Yang, Hui Li, Qiushi Liu, Zhiqiang Cheng, Yi Lin
Format: Article
Language:English
Published: Elsevier 2025-01-01
Series:Nuclear Engineering and Technology
Subjects:
Al2O3:C
X-ray spectrum
Radioluminescence(RL)
EM (expectation-maximization) method
Online Access:http://www.sciencedirect.com/science/article/pii/S1738573324003772
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The X-ray spectrum of X-ray tube is crucial for radiation dose calculations. Due to the high photon flux, it is difficult to directly measure the primary spectrum of X-ray tube. Transmission measurement is one of indirect method used to determine the primary spectrum of X-ray tube. Although the method is experimentally simple, X-ray spectrum estimation from transmission method is a seriously ill-conditioned problem. In this paper, a new transmission measurement instrument with an the Al2O3:C crystal detector is proposed. Real-time dose rate attenuation data from transmission method are collected by using the radioluminescence(RL) of the Al2O3:C crystal. The expectation-maximization (EM) method is applied for X-ray spectrum estimation from transmission method. The method is demonstrated on typical simulated spectra of 80,100,120,140 and 160 kV from X-ray tubes. The X-ray spectra are simulated with the Monte Carlo code Geant4. The EM method is successfully applied to seriously ill-conditioned and under determined estimation problems. The results showed that the X-ray spectrum estimation method is a robust technique for estimating the primary spectrum of X-ray tube, and that the new instrument for transmission measurements can be used to accurately estimate X-ray spectrum.
ISSN:1738-5733

Similar Items