Gamma-rays energy levels

Before counting the sample, perform detector system quality control measurements to assure that energy calibration, count-rate response, and background levels are within the acceptable range. Examine the energy calibration equation to confirm the relation of channel number to gamma-ray energy. 

However, when looking for data about energy levels in the nucleus, as opposed to gamma-ray energies, it would be necessary to look under the daughter,... 

It is not immediately clear, however, whether all of the NuData data has been subject to the same careful, defined, evaluation as the DDEP data. I would support the NPL recommendation of DDEP followed hy ENSDF, at least for data for routine gamma spectrometry purposes. For nuclear-level data, as opposed to gamma-ray energies, the online NuData resource is excellent. I have no hesitation in recommending it. 

Spectral Gamma Ray Log. This log makes use of a very efficient tool that records the individual response to the different radioactive minerals. These minerals include potassium-40 and the elements in the uranium family as well as those in the thorium family. The GR spectrum emitted by each element is made up of easily identifiable lines. As the result of the Compton effect, the counter records a continuous spectrum. The presence of potassium, uranium and thorium can be quantitatively evaluated only with the help of a computer that calculates in real time the amounts present. The counter consists of a crystal optically coupled to a photomultiplier. The radiation level is measured in several energy windows. 

There are three methods of attenuating (reducing the energy level of) gamma-rays photoelectric effect, compton scattering, and pair production. 

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