Portable computing device for measuring radiations

Portable computing device comprising means for adding digital information, means for determining periods of time and display means, and a nuclear detector adapted to deliver electrical signals whose amplitude spectrum depends in a one-to-one relationship on the energy spectrum of the radiation in which it is placed and means for converting these signals into digital information, electronic means for compensating the sensitivity of the detector as a function of the energy of the radiation so as to render it identical to that of human tissues so that the detector produces an output signal which is in a constant ratio with the energy of said radiation which may be absorbed by human tissues, the addition means receiving said digital information, the means for determining periods of time controlling said addition means so as to make a calculation of the dose of nuclear radiation received during a period of time, called integral dose, which is displayed by said display means.