Fig. 1. Schematic diagram of the neutron testing model

Fig. 2. Schematic diagram of the γ-ray measuring device

Fig. 3. Visible spectra of PMMA with different Gd(MA)₃ contents

Fig. 4. Neutron energy spectrum of ²⁵²Cf with and without succedent 12 cm HDPE moderator

Fig. 5. Experimental and MCNP simulated values of shielding ratio with different Gd(MA)₃ contents and their relative errors

Fig. 6. ¹⁵⁵Gd and ¹⁵⁷Gd neutron absorption cross sections (color online)

Fig. 7. Variation of transmittance ratio with thickness for PMMA with different Gd(MA)₃ contents

Fig. 8. Linear and mass attenuation coefficients for PMMA with different Gd(MA)₃ contents

Fig. 9. TGA curves of PMMA with different Gd(MA)₃ contents (color online)

Fig. 10. Tensile properties of PMMA with different Gd(MA)₃ contents