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VNUHCM Journal of

Science and Technology Development

An official journal of Viet Nam National University Ho Chi Minh City, Viet Nam since 1997

ISSN: 1859-0128
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STUDY ON DECONVOLUTION FOR GAMMA SPECTROSCOPY USING ML-EM ALGORITHM AND MCNP SIMULATION

Nhon Van Mai 1, *
Ngoc Van Le 2
Loan Thi Hong Truong 1
Phuong Nguyen Dang 1

  1. University of Natural Sciences, VNU-HCMC
  2. Institute of Nuclear Science and Technique, Ha noi
Correspondence to: Nhon Van Mai, University of Natural Sciences, VNU-HCMC. Email: pvphuc@hcmuns.edu.vn.
Volume & Issue: Vol. 12 No. 12 (2009) | Page No.: 22-28 | DOI: 10.32508/stdj.v12i12.2315
Published: 2009-06-28

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Copyright © 2009 by the author(s).

This article is published with open access by Viet Nam National University, Ho Chi Minh City, Viet Nam. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

Abstract

In this paper, the ML-EM (Maximum Likelihood Fitting by Expectation Maximization) algorithm was used in deconvolution of continuum gamma ray for HPGe detector. A set of response functions was simulated by using MCNP4C2 code for gamma radiation emitted from point source located at 10.6cm from detector. The source energies varied from 50.1 keV to 1502.1 keV with 2.5 keV step were detected by the 8192 - channel spectrometer. The results of deconvolution for some gamma spectra of Co-60, CS-137, Eu-152 showed that the photopeak areas of the deconvoluted spectra were considerably raised in compare with ones of measured spectra in the same condition.

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