Accession Number : AD0444935


Title :   PHOTOGRAPHIC DETECTION OF FAST NEUTRONS: APPLICATION TO NEUTRON RADIOGRAPHY


Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA


Personal Author(s) : Tochilin, E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/444935.pdf


Report Date : 21 Jul 1964


Pagination or Media Count : 32


Abstract : The response of photographic emulsions to fast neutrons has been studied by direct measurements at two neutron energies and by exposure to high- energy charged particles. Dose response was significantly less for neutrons than for gamma rays and decreased progressively with decreasing neutron energy. Increased neutron sensitivity was obtained by use of organic scintillators as intensifying screens in conjunction with film. Neutron radiographs at two different energies were taken with step wedges made of Al, Cu, Pb and plastic. Radiographs were taken behind 2, 4, 6 and 8 inches of lead. Loss of photographic resolution from gamma rays produced in the test sample and by thermal neutron interactions is discussed.


Descriptors :   *FAST NEUTRONS , *NEUTRON RADIOGRAPHY , ENERGY , RESOLUTION , COPPER , ALUMINUM , GAMMA RAYS , PHOTOGRAPHIC FILM , EXPOSURE(PHYSIOLOGY) , PLASTICS , LEAD(METAL) , PHOTOGRAPHIC EMULSIONS , PHOSPHORESCENT MATERIALS , THERMAL NEUTRONS , MEASUREMENT , DETECTION


Subject Categories : Nuclear Physics & Elementary Particle Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE