Abstract: Neutron radiation can be attenuated by a material comprising acrylonitrile butadiene styrene (ABS) filament infused with gadolinium, boron, gold, and/or cadmium. The metal-infused filaments are 3D-printed to form a sleeve or cover for gamma and/or alpha radiation detectors to shield, absorb and allow detection of neutrons that are converted to gamma and or alpha radiation. The materials can also allow discrimination between neutron and gamma and/or alpha radiation in a mixed radiation field. Boron-infused filaments also provide neutron shielding and can be used in the manufacture of water equivalent phantoms.

Abstract: Neutron dosimetry is performed using a water-based chemical dosimeter measurement of radiation-induced reduction of hexavalent Cr (VI) to trivalent Cr (III) in the presence of sodium formate at pH 9.2. Neutron absorbance material (Gd-157) increases the neutron interaction with the dosimeter. When a monoenergetic beam with 0.025 eV energy was used as a thermal neutron source 1 mol/dm3 of Gadolinium gave the best outcome while surrounding the dosimeter with 1 cm Gadolinium sheets. The dosimeter was giving acceptable readings when using thermal neutrons.