Pertaining to the measurement of geologic time by the analysis of certain radioisotopes in rocks and their known rates of decay.

radiometric dating: determination method of absolute age of minerals or rocks crystallisation or of subsequent events (ex. metamorphism). Method based on isotopic analyses of radioactive elements and their end members (K/Ar, Rb/Sr, U/Pb...)

Refers to methods of age determination based on the nuclear decay of radioactive isotopes.

Using radiation for detection.

geophysical prospecting technique using radiation

A radiometer is a device used for detecting and measuring radiation. These measurements of electromagnetic radiation are referred to as radiometric measurements.

Commonly used to refer to gamma ray spectrometry.

The ability of an IR detector to measure, pixel by pixel, the actual scene temperature and display the results.