Non-destructive testing � Gamma ray scanning method on process columns

2020 ◽  
2007 ◽  
Vol 78 (10) ◽  
pp. 103704 ◽  
Author(s):  
U. Hampel ◽  
A. Bieberle ◽  
D. Hoppe ◽  
J. Kronenberg ◽  
E. Schleicher ◽  
...  

Author(s):  
Chuong Dinh Huynh ◽  
Nguyen Hoang Vo ◽  
Trang Thi Ngoc Le ◽  
Linh Thi Truc Nguyen ◽  
Tuyet Kim Tran ◽  
...  

The effect of the diameter of the detector collimator on the saturation thickness in gamma-scattering measurements is studied using the spectrum of singly scattering. Geometric arrangement of gamma-scattering measurement includes: a gamma-ray collimated beam with the energy of 662 keV emitted from 137Cs source is irradiated on a rectangular aluminium target with incident angle of 90o, and detector NaI(Tl) 5.1cmx5.1cm with collimator is used to record the scatterd gamma rays at scattered angle of 120°. The experimental measurements are carried out to obtain scattered spectra with various target thickness and diameter of detector collimator. The profile of the singly scattering and multiply scattering in the scattered spectra are determined by a spectrum processing technique based on the least squares fitting. The experimental results showed that the saturation thickness of the counts of singly scattering increases with increasing the window diameter of the detector collimator. These results will support for the non-destructive testing research of application of gamma-scattering method to determine the thickness or the defect of the sample.


2016 ◽  
Vol 44 ◽  
pp. 1660216 ◽  
Author(s):  
Gabriel Suliman ◽  
Violeta Iancu ◽  
Calin A. Ur ◽  
Mihai Iovea ◽  
Izuru Daito ◽  
...  

The Nuclear Physics oriented pillar of the pan-European Extreme Light Infrastructure (ELI-NP) will host an ultra-bright, energy tunable, and quasi-monochromatic gamma-ray beam system in the range of 0.2–19.5 MeV produced by laser Compton backscattering. This gamma beam satisfies the criteria for large-size product investigations with added capabilities like isotope detection through the use of nuclear resonance fluorescence (NRF) and is ideal for non-destructive testing applications. Two major applications of gamma beams are being envisaged at ELI-NP: industrial applications based on NRF and industrial radiography and tomography. Both applications exploit the unique characteristics of the gamma beam to deliver new opportunities for the industry. Here, we present the experimental setups proposed at ELI-NP and discuss their performance based on analytical calculations and GEANT4 numerical simulations. One of the main advantages of using the gamma beam at ELI-NP for applications based on NRF is the availability of an advanced detector array, which can enhance the advantages already provided by the high quality of the gamma beam.


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