Wenbao JIA, Yize CHEN, Daqian HEI, Dong ZHAO, Can CHENG. Prompt gamma-ray activation imaging based on multi coded-aperture collimators[J]. NUCLEAR TECHNIQUES, 2022, 45(10): 100201
- NUCLEAR TECHNIQUES
- Vol. 45, Issue 10, 100201 (2022)
Fig. 1. Schematic diagram of PGAI measurement based on multi-coded collimators
Fig. 2. MCNP model of element imaging measuring device
Fig. 3. Composition distribution of sample
Fig. 4. Several typical pattern of coded-aperture collimators
Fig. 5. γ ray spectrogram (a) and Cl element 1.164 MeV characteristic peak under different coded collimators (b)
Fig. 6. Gray scale image of partial detection efficiency
Fig. 7. Cl element reconstruction without considering neutron self shielding effect
Fig. 8. Reconstructed image of Cl element after neutron self screen correction (a), deviation between simulation results of 11 pixels with Cl and true value (b)
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Table 1. Characteristic gamma ray energy of Cl
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