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Updated: Jan 2, 2026

Neutron Radiography and Computed Tomography of Biological Systems at the Oak Ridge National Laboratory's High Flux Isotope Reactor
Published on: May 7, 2021
Fast Neutron Dose Measurements for a D-D Neutron Source in Water
Abstract:
The penetration of D-D neutrons in water has been studied through measurements of first collision dose. A relative measurement of first collision dose as a function of distance from the neutron source was made at 0°. At large penetrations the results appear to approach asymptotically the slope predicted by the theoretical calculations of Goldstein et al. [0] for a monoenergetic, isotropic 4.0-Mev neutron source in water. However as expected, the measurements close to the source where the average neutron spectrum is relatively soft indicate a steeper slope than the theoretical calculation. Further calculations will be required to obtain an explicit check of this experiment.
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