Patent ID: 6954512

Claim:
A neutron spectrometer monitor, comprising: a plurality of neutron detectors; said monitor is placed in proximity to a suspected concentration of neutron radiation; each of said plurality of detectors further comprising a rectangular detector means stacked on an aluminum proton-absorbing layer, each of said proton-absorbing layers being stacked on a hydrogenous substrate; said hydrogenous substrate being composed of polyethylene and containing hydrogen atoms, said hydrogen atoms interacting with said suspected concentration of neutron radiation, said hydrogenous substrate converting said neutron radiation to plurality of recoil protons that travel in straight lines through said proton-absorbing layer and said detector means, each of said detector means detecting said plurality of recoil protons and further comprising a depleted n/p diode; said hydrogenous substrate deflecting a plurality of scattered neutrons away from said hydrogenous substrate; each of said proton-absorbing layers having a different thicknesses, d, to absorb a plurality of neutron energies from 1 to 250 MeV; said plurality of neutron detectors being housed in a flat rectangular chamber composed of tantalum, said chamber having a polyethylene floor, a plurality of compartments for each of said detector means and a lid; each of said detector means, being coupled to a means for data processing, sends a separate count of recoil protons for each of said different thicknesses, d, to said data processing mean; said data processing means providing said separate count of recoil protons to a means for proton distribution; and said means for proton distribution determines a proton distribution pattern to generate a neutron spectrum pattern that construct an original neutron spectrum from said suspected concentration of neutron radiation.