Prospecting or detecting by the use of nuclear radiation

GPHYSICS G01Measuring instruments G01VGEOPHYSICS GRAVITATIONAL MEASUREMENTS DETECTING MASSES OR OBJECTS

G01V5/00Prospecting or detecting by the use of nuclear radiation

G01V5/0008Detecting hidden objects G01V5/0016Active interrogation, i.e. using an external radiation source G01V5/0025Measuring scattered radiation G01V5/0033Mixed interrogation beams G01V5/0041Multiple energy techniques using one type of radiation G01V5/005using Tomography G01V5/0058using stereoscopic means G01V5/0066having relative motion between the source, detector and object other than by conveyor G01V5/0075Passive interrogation G01V5/0083utilizing a network G01V5/0091detecting special nuclear material [SNM] G01V5/02specially adapted for surface logging G01V5/025specially adapted for use from aircraft G01V5/04specially adapted for well-logging G01V5/045Transmitting data to recording or processing apparatus; Recording data G01V5/06for detecting naturally radioactive minerals G01V5/08using primary nuclear radiation sources or X-rays G01V5/085using another radioactive source G01V5/10using neutron sources G01V5/101and detecting the secondary Y-rays produced in the surrounding layers of the bore hole G01V5/102the neutron source being of the pulsed type G01V5/104and detecting secondary Y-rays as well as reflected or back-scattered neutrons G01V5/105the neutron source being of the pulsed type G01V5/107and detecting reflected or back-scattered neutrons G01V5/108the neutron source being of the pulsed type G01V5/12using gamma or X-ray sources G01V5/125and detecting the secondary gamma- or X-rays in different places along the bore hole G01V5/14using a combination of several sources G01V5/145using a neutron source combined with a gamma- or X-ray source