Statistics – Applications
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2339..196v&link_type=abstract
Proc. SPIE Vol. 2339, p. 196-200, International Conference on Neutrons and Their Applications, George Vourvopoulos; Themis Parad
Statistics
Applications
Scientific paper
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.
Johnson L. O.
Nieschmidt E. B.
Vegors Stanley H.
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