Long be filter compared with be-bi filter for dedicated cold neutron radiography beam
Source abstract
Abstract
Abstract A study has been undertaken to identify low cost options for converting thermal neutron radiography beams into beams optimized for cold neutron radiography. A simple polycryslalline beryllium filter cooled by liquid nitrogen, if sufficiently long, can discriminate against gamma radiation efficiently enough for many cold neutron radiography requirements. This allows filters to be designed that avoid problems of imperfect bismuth crystals and associated non-uniform neutron transmission for large dimension film exposures. Minimization of thermal neutron flux build up is also considered in the context of a typical radiographic beam geometry. A beryllium filter about 100cm long is considered as an attractive alternative to Be- Bi filters, guide tubes, or refrigerated cold moderators for purpose-built cold neutron radiography facilities.
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Research context
OpenAlex topics: Nuclear Physics and Applications · Nuclear and radioactivity studies · Nuclear reactor physics and engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
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