Analysis using neutrons

Details Analysis using neutrons Analysis using neutrons

1990-03-19

1991-11-26

Howell, Janice A.

Radiant energy

Coded record and readers; invisible radiant energy type

250269, 250265, G01V 500

Patent

active

050685325

ABSTRACT:
A tool suitable for borehole logging, including production oilwell borehole logging, contains a radioisotope neutron source (14), a fast neutron detector (15) and a gamma-ray detector (16). Gamma-ray detection events are selected for building spectra by coincidence or anticoincidence with detection of the associated neutron. In a development, additional information is derived from identification of which of a series of time intervals encompasses detection of a neutron after detection of a gamma-ray.

REFERENCES:
patent: 4239965 (1980-12-01), Oliver et al.
patent: 4387302 (1983-06-01), Givens
patent: 4430567 (1984-02-01), Oliver et al.
patent: 4766543 (1988-08-01), Schmidt

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