Neutron activation probe for measuring the presence of uranium i

Details Neutron activation probe for measuring the presence of uranium i Neutron activation probe for measuring the presence of uranium i

1978-04-11

1979-12-25

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250265, 250269, G01V 500

Patent

active

041807286

ABSTRACT:
A neutron activation probe comprises a pulsed neutron source in series with a plurality of delayed neutron detectors for measuring radioactivity in a well borehole together with a NaI (T1) counter for measuring the high energy 2.62 MeV gamma line from thorium. The neutron source emits neutrons which produce fission in uranium and thorium in the ore body and the delayed neutron detectors measure the delayed neutrons produced from such fission while the NaI (Tl) counter measures the 2.62 MeV gamma line from the undisturbed thorium in the ore body. The signal from the NaI (T1) counter is processed and subtracted from the signal from the delayed neutron detectors with the result being indicative of the amount of uranium present in the ore body.

REFERENCES:
patent: 3686503 (1972-08-01), Givens et al.
patent: 3825753 (1974-07-01), Givens

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