VIDL Network experience can introduce you to radiometrics. The energies of gamma-rays produced by radioactive decay are characteristic of the decaying nuclide. Gamma-ray spectrometers are designed to measure the intensity and energies of gamma-rays and hence measure the distribution of particular radioactive nuclides. Airborne gamma-ray spectrometry commenced in the late 1960´s and its primary use was in uranium exploration. Since the mid-1970´s, the method has been applied extensively in support of geological mapping and mineral exploration.