A device in which the influence of ?-ray is reduced, and a composition for forming an organic layer. The device includes an ?-ray source, an electronic circuit influenced by ?-ray, and an organic layer including an ?-ray shielding agent, in which an ?-ray shielding ability X of the ?-ray shielding agent is 0.50 or less.

[Object] To provide a radiation shielding material that includes a resin composition obtained by filling a matrix formed of resin with a radiation-absorbing substance and is capable of obtaining a structure in which transparency is significantly improved as compared with the conventional radiation shielding material while having a radiation shielding effect similar to that of the conventional radiation shielding material. [Solving Means] A radiation shielding material includes: a resin composition containing a proportion of 20 to 80 vol % of fluoride powder containing barium as a constituent element. The fluoride powder is favorably barium fluoride or lithium barium fluoride, the resin favorably has a refractive index (n) of 1.4 to 1.6, and particularly, a difference between a refractive index of the resin and a refractive index of the fluoride powder is favorably within 0.05.

Embodiments herein disclose a shielding curtain that is configured to block through passage of electromagnetic radiation. The shielding curtain may be a flap portion of a larger shielding curtain or a single, unitary body that includes a single mounting bead and a plurality of flaps. The shielding curtain is formed of a polymer material that has a uniformly dispersed particulate material. Electromagnetic radiation emitted by an inspection system is blocked by the uniformly dispersed particulate material.

Embodiments herein disclose a shielding curtain that is configured to block electromagnetic radiation from passing through it. The shielding curtain may be a flap portion of a larger shielding curtain or a single, unitary body that includes a single mounting bead and a plurality of flaps. The shielding curtain is formed of a polymer material that has a uniformly dispersed particulate material. Electromagnetic radiation emitted by an inspection system is blocked by the uniformly dispersed particulate material.

The present disclosure relates to an inorganic, halogen-free flameproofing agent produced from modified, carbonized red mud (MKRS-HT) having, in some examples, a mineral composition of 10 to 50 weight % of iron compounds, 12 to 35 weight % of aluminum compounds, 5 to 17 weight % of silicon compounds, 2 to 10 weight % of titanium dioxide, 0.5 to 6 weight % of calcium compounds, the weight ratio of Fe (II) carbonate to the oxides of iron being at least 1. Examples of the agent can be used as a flame retardant in the high-temperature range. The disclosure further relates to an agent produced from modified, carbonized and rehydrated red mud, which can be used as a flame retardant in the low-temperature and high-temperature ranges, methods for producing same and use as flame retardants. The disclosure further relates to a flameproofed material system and methods for producing same.

The disclosure relates to an inorganic, halogen-free flameproofing agent produced from modified, recarbonized red mud (MKRS-HT). The agent may have a mineral composition of 10 to 50 weight % of iron compounds, 12 to 35 weight % of aluminum compounds, 5 to 17 weight % of silicon compounds, 2 to 10 weight % of titanium dioxide, 0.5 to 6 weight % of calcium compounds the weight ratio of Fe (II) carbonate to the oxides of iron being at least 1. The agent, according to examples, can be used as a flame retardant in the high-temperature range. The disclosure further relates to flameproofing agent produced from modified, recarbonized and rehydrated red mud, which may be a flame retardant in the low-temperature range as well as in the high-temperature range, methods for producing same and use as flame retardants, substitutes, synergists, thermal stabilizers, heat accumulators, heat insulators and/or sound insulators and/or as electromagnetic radiation shielding materials.

Alpha/beta radiation barrier materials and structures formed to include the barrier materials are described. Barrier materials include a matrix and particulate materials contained in the matrix. The particulates include alpha/beta radiation absorbers. Alpha/beta radiation absorbers of the barrier materials can be molecular, particulates, or defined nanostructures that are capable of absorbing incident alpha/beta particle energies. Matrix materials can include organic or inorganic materials including thermoplastic polymers, thermoset polymers, glasses, ceramics, etc.

A composite material for neutron shielding and for maintaining subcriticality obtained from a formulation including: 100 portions by weight of a composition including, the weight percentages being based on the total weight of the composition: from 30% by weight to 45% by weight of a thermosetting resin selected from a polyester resin and a vinylester resin, from 23% by weight to 58% by weight of an inorganic filler, the inorganic filler including at least one hydrogenated compound and at least one boron compound, and from 12% by weight to 32% by weight of a polyolefin or of an olefin copolymer; from 0.3 portion by weight to 1.4 portion by weight of a polymerisation initiator; and from 0.3 portion by weight to 1.4 portion by weight of a polymerisation accelerator. A manufacturing method to use this composite material.

A system and method for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (n, f) reactions in U-238. The U-238 can be deployed as one or more layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material. The gaseous fission products can be withdrawn from the irradiation chamber on a continuous basis, and the radioactive iodine isotopes (including I-131) extracted.

Embodiments herein disclose a shielding curtain that is configured to block electromagnetic radiation from passing through it. The shielding curtain may be a flap portion of a larger shielding curtain or a single, unitary body that includes a single mounting bead and a plurality of flaps. The shielding curtain is formed of a polymer material that has a uniformly dispersed particulate material. Electromagnetic radiation emitted by an inspection system is blocked by the uniformly dispersed particulate material.