Neutron coincidence calorimeter

Details Neutron coincidence calorimeter Neutron coincidence calorimeter

1989-04-25

1990-06-05

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

250364, 250367, 25039011, G01T 306

Patent

active

049316494

ABSTRACT:
A spectrometer for MEV neutrons relies upon total energy absorption to measure neutron energy. Neutrons are thermalized in a liquid scintillator-moderator providing a first light pulse and are subsequently captured in a Li-6 glass scintillator providing a second light pulse. The light pulses are converted into first and second electronic signals by photomultipliers. A coincidence signal is required from the neutron capture prior to gating electronic circuitry for measuring the amplitude of the first electronic signal. The dual signal from a single neutron provides a mechanism for discrimination against background events arising either from gamma rays or from ambient, low-energy neutrons. The spectrometer is particularly useful in situations in which the neutron source intensity is very low.

REFERENCES:
patent: 3566118 (1971-02-01), Peters
patent: 4814623 (1989-03-01), Robertson et al.
R. Aleksan et al., "Measurement of Fast Netrons in the Gran Sasso Laboratory Using a 'Li Doped Liquid Scintillator", Nuclear Instruments and Methods in Physics Research A274, (1989), 203-206.
D. M. Drake et al., "New Electronically Black Neutron Detectors", Nuclear Instruments and Methods in Physics Research A247, (1986), 576-582.
S. Ait-Boubker et al., "Thermal Neutron Detection and Identification in a Large Volume with a New Lithium-6 Loaded Liquid Scintillator", Nuclear Instruments and Methods in Physics Research A277, May 1989, 461-466.

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