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Updated: Feb 14, 2026
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Dosimetry for Cell Irradiation using Orthovoltage 40-300 kV X-Ray Facilities
Published on: February 20, 2021
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Multi-source irradiation facility with improved space configuration for neutron activation analysis: Design
N A Kotb1, Ahmed H M Solieman2, T El-Zakla1
1Radiation Protection Department, Hot Laboratories Centre, Atomic Energy Authority, Egypt.
Summary
A new neutron irradiation facility using americium-241 beryllium sources was designed for neutron activation analysis. It achieves high thermal neutron homogeneity and flux, ideal for precise sample analysis.
Area of Science:
- Nuclear Engineering
- Materials Science
Background:
- Neutron irradiation facilities are crucial for applications like neutron activation analysis (NAA).
- Optimizing neutron flux and homogeneity is key for accurate and efficient analysis.
Purpose of the Study:
- To design and optimize a neutron irradiation facility for neutron activation analysis.
- To achieve high thermal neutron flux and homogeneity within the sample volume.
Main Methods:
- Design and simulation of a neutron irradiation facility using MCNP-5 code.
- Utilizing six 30 Ci 241Am-Be neutron sources embedded in paraffin wax as moderator and reflector.
Main Results:
- Achieved a thermal neutron flux of 8.0 × 10^4 n/cm^2.s over a 5 cm diameter spherical sample.
- Obtained high space symmetry and thermal neutron homogeneity within 98% of flux distribution.
- Reported thermal-to-fast and thermal-to-epithermal ratios of 1.20 and 3.35, respectively.
Conclusions:
- The designed neutron irradiation facility meets the requirements for effective neutron activation analysis.
- The optimized design maximizes thermal neutron flux and homogeneity for sample irradiation.
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