photofission


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photofission

[¦fōd·ō′fish·ən]
(nuclear physics)
Fission of an atomic nucleus that results from absorption by the nucleus of a high-energy photon.
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SAIC states that with added funds it could (1) integrate detection of photofission with CAARS radiography, (2) hire more software engineers to speed development of algorithms to improve the system's ability to differentiate between materials; and (3) pursue application of the system to detect contraband.
One option proposed is to keep the source at the Bates Center and establish the source as a "user facility" where researchers can come in to do experiments (e.g., NRF measurements at 9 MeV or experiments with prompt photofission).
Conversely, if EZ-3D identified a region of interest, the system would reposition the container to analyze that region using NRF and photofission signatures and would likely increase scan time for that container.
This can be done, for example, by using a beam of high energy photons to artificially induce photofission, and then detecting the resulting fission signatures.
Another risk concerns the effectiveness of a possible CAARS add-on to detect radiation induced by photofission. Gamma rays so induced might be detectable, but neutron-absorbing shielding could hinder detection of neutrons.