| 摘要 |
The invention concerns a novel radiation attenuating material made of plastic material (for example a polyamide, polypropylene or polycarbonate thermoplastic material) comprising a metallic filler consisting of a combination of at least two, preferably, three metals or metal derivatives (oxides or alloys) of different type, except lead, selected on the basis of discontinuities of the X- or gamma radiation absorption curve of said metals or metal derivatives, so as to obtain complementarity of said curves on the energy range of radiation to be absorbed or attenuated, to optimise radiation protection on said energy range. The metallic filler is preferably in the form of a powder whereof the particle dimensions are for the major part less than 50 mu m. Said filler is present in proportions ranging between 70 and 95 % of the weight of the final material and is selected preferably among dense metals such as tungsten, tin, bismuth, barium, antimony, lanthanides, tantalum or derivatives thereof, in particular oxides and alloys. Said radiation attenuating material is used for producing shielding structures, in the field of medical or industrial imaging using electromagnetic X- or gamma radiation for preparing, using or storing radioactive products emitting said type of radiation. |
