That is, the size of the source is limited to the smallest size required to make the required measurement. The typical gamma level or density system consists of four parts: the radioactive source, a ...

The exact measurement of thoron is, however, important for the estimation of risks, as at the same activity concentration, a 14-fold higher radiation level results from the thoron progenies than ...

Each voltage pulse corresponds to one ionising radiation entering the GM tube. The voltage pulse is amplified and counted. The greater the level of radiation, the more ionisation in the tube so ...