https://doi.org/10.1140/epja/i2019-12827-x
New Tools and Techniques - Experimental Physics
A peak shape model with high-energy tailing for high-resolution alpha-particle spectra
1
School of Computer Science, Sichuan University of Science & Engineering, 643000, Zigong, China
2
Key Laboratory of Higher Education of Sichuan Province for Enterprise Informationalization and Internet of Things, Sichuan University of Science & Engineering, 643000, Zigong, China
3
The College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, 610059, Chengdu, China
4
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, 621900, Mianyang, China
* e-mail: shirui0601@126.com
Received:
19
March
2019
Accepted:
5
July
2019
Published online:
27
August
2019
The measurement of alpha-particle spectra using semiconductor silicon detectors is an important radioactive analysis method for alpha emitters. It is a common situation that the peaks of alpha-particles with nearby energies are overlapping even with high-resolution alpha-particle spectrometry. In this work, an improved peak shape model named EMG-Landau (Exponentially Modified Gaussian with Landau), taking the high-energy tailing into account, was proposed based on the traditional EMG (Exponentially Modified Gaussian) model. Then the EMG-Landau model was effectively tested by using IAEA reference alpha spectra for unfolding performance and EUROMET reference alpha spectra for estimating the activity ratio. Compared with the traditional EMG model, the EMG-Landau model could be more accurate to fit high-resolution alpha spectra with high-energy tailing.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2019
