Large-volume slow-neutron interrogation facility

Stanley H. Vegors Jr.; E. B. Nieschmidt; L. O. Johnson

doi:10.1117/12.204154

3 March 1995 Large-volume slow-neutron interrogation facility

Stanley H. Vegors Jr., E. B. Nieschmidt, L. O. Johnson

Proceedings Volume 2339, International Conference on Neutrons and Their Applications; (1995) https://doi.org/10.1117/12.204154
Event: 4th International Conference on Applications of Nuclear Techniques: Neutrons and their Applications, 1994, Crete, Greece

Abstract

Characterization of sealed containers requires the use of many techniques. These techniques may be via active interrogation or, if the contents are radioactive, by a variety of passive techniques. One of the frequently used interrogative techniques is neutron interrogation, thermal or fast. The resultant detected radiation can be either neutrons or photons (gamma- rays). The use of neutrons is greatly influenced by the presence of moderators (mainly ¹H) and neutron absorbers (¹H, Cd, etc.). Complete characterization of such containers also requires the determination of substances (e.g., mercury) which do not produce neutrons as a result of neutron interrogation. To solve some of these characterization challenges a facility is required to study neutron capture leading to the production of more neutrons [i.e. (n,f)] or to other reactions such as (n,(gamma) ). Among the requirements of such a facility are good neutron conservation, efficient neutron moderation and long thermal neutron die-away time. Since one of the materials to be identified and quantified is ¹H the facility must not contain this nuclide if possible.

Citation Download Citation

Stanley H. Vegors Jr., E. B. Nieschmidt, and L. O. Johnson "Large-volume slow-neutron interrogation facility", Proc. SPIE 2339, International Conference on Neutrons and Their Applications, (3 March 1995); https://doi.org/10.1117/12.204154

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