Induced nuclear reactions: processes – systems – and elements – Detection of radiation by an induced nuclear reaction
Patent
1992-10-22
1994-05-17
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Detection of radiation by an induced nuclear reaction
376159, 376166, 250270, 2504831, G01T 300, G01V 500
Patent
active
053135040
ABSTRACT:
An apparatus to survey subsurface formations includes a sonde which is configured to move through a borehole. The sonde includes a neutron generator that emits neutrons into the subsurface formations. A crystal detector connected to the sonde monitors the neutron output of the neutron generator. The crystal detector can comprise an yttrium silicate crystal, an yttrium aluminate crystal, a lanthanum phosphate crystal, or a lutetium phosphate crystal. A lanthanum phosphate crystal or a lutetium phosphate crystal can also be used to detect photons coming from the subsurface formations. The sonde pressure casing can be fabricated from borated stainless steel to shield the internals of the sonde from thermal neutrons.
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Carroll J. L.
Czirr Shanna Lee
Merrill David B.
Wasil Daniel D.
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