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Class Information
Number: 376/160
Name: Induced nuclear reactions: processes, systems, and elements > Nuclear transmutation (e.g., by means of particle or wave energy) > By neutron bombardment > Neutron activation analysis > Subterranean
Description: Subject matter wherein the bombardment takes place beneath the surface of the earth.










Sub-classes under this class:

Class Number Class Name Patents
376/161 Specific nuclides 10
376/167 With tracer injection 5


Patents under this class:

Patent Number Title Of Patent Date Issued
7439494 Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole Oct. 21, 2008
7139350 Method and apparatus for measuring radiation in a borehole Nov. 21, 2006
6577697 Field analysis of geological samples using delayed neutron activation analysis Jun. 10, 2003
5539788 Prompt gamma neutron activation analysis system Jul. 23, 1996
5410575 Detection of buried nitrogen rich materials Apr. 25, 1995
5237594 Nuclear activation method and apparatus for detecting and quantifying earth elements Aug. 17, 1993
4810459 Method and apparatus for determining true formation porosity from measurement-while-drilling neutron porosity measurement devices Mar. 7, 1989
4780266 Method for detecting drilling fluid in the annulus of a cased wellbore Oct. 25, 1988
4661701 Methods and apparatus for borehole-corrected spectral analysis of earth formations Apr. 28, 1987
4492865 Borehole influx detector and method Jan. 8, 1985
4264812 Method for determining the absorption cross section of small fluid samples Apr. 28, 1981
4170732 Pulsed neutron porosity logging method and apparatus using dual detectors Oct. 9, 1979
4005290 Neutron-neutron logging Jan. 25, 1977
3969630 Method and apparatus for defining radiation-opaque pathways within shielding materials Jul. 13, 1976
3940611 Method for determining thermal neutron decay times of earth formations Feb. 24, 1976











 
 
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