"A Boron Loaded Approach to Directionally Sensitive Neutron Detectors,"
Proceedings of the INMM 52nd Annual Meeting
, Palm Desert, CA, July 17-21, 2011.
With an increase in the capabilities and sophistication of
terrorist networks worldwide comes a corresponding increase in the
probability of a radiological or nuclear device being detonated
within the borders of the United States. In order to reduce this
threat, new types of radiation detectors are being developed which
allow for dependence upon both energy and angular resolution.
Directional sensitivity can be gained by observing the n + 10B
reaction, and the resultant de-excitation Doppler broadened photon
provided 94% of the time from the reaction. By measuring a
combination of the reactant products and the energy of the Doppler
broadened de-excitation photon emitted from 7Li, a conic series of
solution vectors for the incoming neutron angle can be determined.
Data for a prototype detector was developed using simulations with
MCNPX. Results for this detector and the sensitivity of the
uncertainty in the predicted incoming neutron angle to measurement
parameters are given.
Associated Project(s):Direction Sensitive Neutron Detectors for Border MonitoringSHIELD (Smuggled HEU Interdiction through Enhanced anaLysis and Detection): A Framework for Developing Novel Detection Systems Focused on Interdicting Shielded HEU