Century Geophysical - Model 7201 - Spectral Gamma Logging Tool Brochure

The Spectral Gamma tool is a three- channel analysis of the gross gamma ray spectrum as it relates to potassium, uranium, and thorium content. An internal energy source of less than 1 micro-curries of Cs137 is used  to  excite  the  crystal  and  to stabilize the electronics prior to logging. The spectral window is recorded via a 256 channel spectrum board  so  that  the  different  energy levels from the formation can be analyzed.