Patent Number: 
Section: claims

1. 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 a titanium 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 a plurality of recoil protons that travel in straight line 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 thickness, 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 titanium, 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 thickness, d, to said data processing means;  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 constructs an original neutron spectrum from said suspected concentration of neutron radiation. 2. The neutron spectrometer monitor, as recited in  claim 1 , further comprising: claim 1 K  count rate values  C i ( d i )  i= 1,2  . . . K  where for  d ixe2x88x921  less than d i  less than d i+1 , C ixe2x88x921  ( d ixe2x88x921 ) greater than  C i  greater than C i+1 .  said plurality of recoil protons reaching said detecting mean and producing said separate count of recoil protons that decreases as a neutron energy, E n , decreases;  said separate count of recoil protons deceases to zero when a range of maximum energy recoil protons becomes smaller than said different thickness, d, and;  said plurality of proton-absorbing layers, further comprising K number of proton-absorbing layers, each of said K number of proton-absorbing layers having said different thickness, d, being exposed to said suspected concentration of neutrons, provides a count rate calculated according to the formula: 3. The neutron spectrometer monitor, as recited in  claim 2 , further comprising said plurality of neutron detectors having at least 12 of said detector means. claim 2 4. The neutron spectrometer monitor, as recited in  claim 3 , further comprising said chamber serving as an outer shield. claim 3 5. The neutron spectrometer monitor, as recited in  claim 4 , further comprising each of said detector means being a solid state detector. claim 4 6. The neutron spectrometer monitor, as recited in  claim 5 , further comprising said plurality of neutron detectors having 12 of said detector means. claim 5 7. The neutron spectrometer monitor, as recited in  claim 6 , further comprising said polyethylene being solid. claim 6