gamma-ray probe

gamma-ray probe

[′gam·ə ‚rā ‚prōb]
(engineering)
A gamma-ray counter built into a watertight case small enough to be lowered into a borehole.
References in periodicals archive ?
The Disequilibrium Factor (DEF), which measures the ratio between the grades of U3O8 recorded using the assay (ppm U3O8), as compared to measurements recorded using a standard gamma-ray probe (ppm eU3O8) is shown in the last column.
Bertuzzi P, Bruckler L, Gabilly Y, Gaudu JC (1987) Calibration, field-testing, and error analysis of a gamma-ray probe for in situ measurement of dry bulk density.