Detection of thermal neutrons through the use of internal wavele

Details Detection of thermal neutrons through the use of internal wavele Detection of thermal neutrons through the use of internal wavele

1995-01-11

1996-05-21

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

25039001, G01T 306

Patent

active

055192262

ABSTRACT:
An apparatus for detection of thermal neutrons includes a volume of gas which includes .sup.3 He. A wavelength shifting optical (WSO) fiber is disposed to receive ultra-violet (UV) photons generated by reactions between neutrons and .sup.3 He. UV photons are absorbed within the WSO fiber to produce longer wavelength fluorescence generated photons that propagate within the WSO fiber. A photodetector is disposed to receive fluorescence generated photons from at least one end of the optical fiber and provide an output signal corresponding to neutron detection.

REFERENCES:
patent: 4425907 (1984-01-01), Younghouse
patent: 4454422 (1984-06-01), Persyk
patent: 4799748 (1989-01-01), Brown
patent: 4804514 (1989-02-01), Bartko et al.
patent: 4814623 (1989-03-01), Robertson et al.
Derzon et al, .sup.3 He Gas Scintillation Spectrometer for Fusion Neutron asurements, Rev. Sci. Instru. 56(5) May 1985 pp. 1090-1092.
"A High-Pressure .sup.3 HE Gas Scintillation Neutron Spectrometer", IEEE Transactions on Nuclear Science, vol. 33, No. 1-Feb. 1986.

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