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A new neutron energy spectrum unfolding code using a two steps genetic algorithm

Shahabinejad, H ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.nima.2015.12.028
  3. Publisher: Elsevier
  4. Abstract:
  5. A new neutron spectrum unfolding code TGASU (Two-steps Genetic Algorithm Spectrum Unfolding) has been developed to unfold the neutron spectrum from a pulse height distribution which was calculated using the MCNPX-ESUT computational Monte Carlo code. To perform the unfolding process, the response matrices were generated using the MCNPX-ESUT computational code. Both one step (common GA) and two steps GAs have been implemented to unfold the neutron spectra. According to the obtained results, the new two steps GA code results has shown closer match in all energy regions and particularly in the high energy regions. The results of the TGASU code have been compared with those of the standard spectra, LSQR method and GAMCD code. The results of the TGASU code have been demonstrated to be more accurate than that of the existing computational codes for both under-determined and over-determined problems
  6. Keywords:
  7. Neutron spectrum unfolding ; Algorithms ; Codes (symbols) ; Neutron spectrometers ; Neutrons ; Computational codes ; High energy regions ; LSQR ; MCNPX-ESUT ; Neutron energy spectrum ; Neutron spectra ; Pulse height distribution ; TGASU ; Genetic algorithms
  8. Source: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ; Volume 811 , 2016 , Pages 82-93 ; 01689002 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0168900215015995