Optimization of moderator assembly for neutron flux measurement: Experimental and theoretical approaches

Abdul Waheed; Nawab Ali; Muzahir A. Baloch; Aziz A. Qureshi; Eid A. Munem; Muhammad Usman Rajput; Tauseef Jamal; Wazir Muhammad

doi:10.1007/s41365-017-0213-z

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Optimization of moderator assembly for neutron flux measurement: Experimental and theoretical approaches

LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS | Updated：2021-02-23

- Optimization of moderator assembly for neutron flux measurement: Experimental and theoretical approaches
- Nuclear Science and Techniques Vol. 28, Issue 5, Article number: 61(2017)
- Affiliations：
  
  1.Radiation Physics Laboratory, Physics Department, COMSATS Institute of Information Technology (CIIT), Islamabad, Pakistan.
  2.Physics Division, Pakistan Institute of Nuclear Science & Technology (PINSTECH), Islamabad 45650, Pakistan
  3.Department of Physics, College of Science, Majmaah University, Al-Zulfi, Saudi Arabia
  4.School of Physics, University Science Malaysia, Penang 11800, Malaysia
  5.DCIS, Pakistan Institute Engineering & Applied Sciences (PIEAS), Islamabad 45650, Pakistan
  6.Health Physics Division (HPD), Pakistan Institute of Nuclear Science & Technology (PINSTECH), Islamabad 45650, Pakistan
- Author bio：
  
  Corresponding author. E-mail address: wazirm@hotmail.com
- Funds：
- DOI：10.1007/s41365-017-0213-z
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Abdul Waheed, Nawab Ali, Muzahir A. Baloch, et al. Optimization of moderator assembly for neutron flux measurement: Experimental and theoretical approaches. [J]. Nuclear Science and Techniques 28(5):61(2017)
DOI：

Abdul Waheed, Nawab Ali, Muzahir A. Baloch, et al. Optimization of moderator assembly for neutron flux measurement: Experimental and theoretical approaches. [J]. Nuclear Science and Techniques 28(5):61(2017) DOI： 10.1007/s41365-017-0213-z.

摘要

Abstract

A moderator of paraffin wax assembly has been demonstrated where its thickness can be optimized to thermalize fast neutrons. The assembly is used for measuring fast neutron flux of a neutron probe at different neutron energies, using BF,3, (,Φ,1″and 2″) and ,3,He(,Φ,0.5″) neutron detectors. The paraffin wax thickness was optimized at 6 cm for the neutron probe which contains an Am-Be neutron source. The experimental data are compared with Monte Carlo simulation results using MCNP5 version 1.4. Neutron flux comparison and neutron activation techniques are used for measuring neutron flux of the neutron probe to validate the optimum paraffin moderator thickness in the assembly. The neutron fluxes are measured at (1.17 ± 0.09)×10,5, n/s and (1.19 ± 0.1)×10,5, n/s, being in agreement with the simulated values. The moderator assembly can easily be utilized for essential requirements of neutron flux measurements.

关键词

Keywords

Am-Be and 252Cf neutron sourcesBF3&3He detectorsParaffin waxNeutron fluxMonte Carlo simulation

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State Key Laboratory of Geohazard Prevention & Geoenvironmental Protection, Chengdu University of Technology

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