Difference between revisions of "Neutron pinball"
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Revision as of 02:13, 29 January 2016
The Simulation
Photons with a Bremsstrahlung energy distribution are incident upon 64 4 mm dia. thorium cylinders with 1 cm center to center spacing (see the neutron flux plot below). Photofission neutrons were simulated using the MCNPX ACE model. Upon the creation of a neutron, its initial direction of travel is logged and compared with its direction of travel when it leaves the simulation area. The target configuration pictured below is surrounded by a r=100cm cylinder (axis going into the page) of air. All cylinders have a height of 76 cm.
Result
15% of neutrons scattered in the thorium cylinders alone, and 17% when the air is included.
Go back Elastic scattering