1. n. [Formation Evaluation]
The principle of an activation log, which is a log of elemental concentrations derived from the characteristic energy levels of gamma rays emitted by a nucleus that has been activated by neutron bombardment. The term is often used to refer specifically to the pulsed neutron spectroscopy measurement.
See related terms: activation log, elemental capture spectroscopy, geochemical log, neutron interactions, pulsed neutron spectroscopy log, spectrum
