Corrections on energy spectrum and scatterings for fast neutron radiography at NECTAR facility

LIU Shu-Quan; cherl Thomas; LI Hang; ZOU Yu-Bin; LU Yuan-Rong; GUO Zhi-Yu

doi:10.1088/1674-1137/37/11/118201

Chinese Physics C> 2013, Vol. 37> Issue(11) : 118201 DOI: 10.1088/1674-1137/37/11/118201

Corrections on energy spectrum and scatterings for fast neutron radiography at NECTAR facility

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Distortions caused by the neutron spectrum and scattered neutrons are major problems in fast neutron radiography and should be considered for improving the image quality. This paper puts emphasis on the removal of these image distortions and deviations for fast neutron radiography performed at the NECTAR facility of the research reactor FRM-Ⅱ in Technische Universität München (TUM),Germany. The NECTAR energy spectrum is analyzed and established to modify the influence caused by the neutron spectrum,and the Point Scattered Function (PScF) simulated by the Monte-Carlo program MCNPX is used to evaluate scattering effects from the object and improve image quality. Good analysis results prove the sound effects of the above two corrections.

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LIU Shu-Quan, cherl Thomas, LI Hang, ZOU Yu-Bin, LU Yuan-Rong and GUO Zhi-Yu. Corrections on energy spectrum and scatterings for fast neutron radiography at NECTAR facility[J]. Chinese Physics C, 2013, 37(11): 118201. doi: 10.1088/1674-1137/37/11/118201

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Received: 2013-01-09
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Corrections on energy spectrum and scatterings for fast neutron radiography at NECTAR facility

Corresponding author: LU Yuan-Rong,

Received Date: 2013-01-09
Accepted Date: 1900-01-01
Available Online: 2013-11-05

Abstract: Distortions caused by the neutron spectrum and scattered neutrons are major problems in fast neutron radiography and should be considered for improving the image quality. This paper puts emphasis on the removal of these image distortions and deviations for fast neutron radiography performed at the NECTAR facility of the research reactor FRM-Ⅱ in Technische Universität München (TUM),Germany. The NECTAR energy spectrum is analyzed and established to modify the influence caused by the neutron spectrum,and the Point Scattered Function (PScF) simulated by the Monte-Carlo program MCNPX is used to evaluate scattering effects from the object and improve image quality. Good analysis results prove the sound effects of the above two corrections.