Apparatus for high precision measuring of a radiation flux composed of gamma rays and fast neutrons

Claim 1

A CALORIMETRIC DOSIMETER FOR MEASURING IONIZING RADIATION, COMPRISING: AN ELONGATED HOLLOW HOUSING; A PLURALITY OF PAIRS OF CELLS ARRANGED IN SUPERPOSED RELATION IN SAID HOUSING, EACH PAIR OF CELLS CONSISTING OF A RECEIVING CELL AND A COMPENSATING CELL, EACH CELL COMPRISING A BODY CONTAINING A NUCLEUS, THE NUCLEUS OF THE RECEIVING CELL BEING MADE OF A MATERIAL CAPABLE OF GENERATING A RELATIVELY LARGE AMOUNT OF HEAT WHEN SUBJECTED TO SAID RADIATION AND THE NUCLEUS OF THE COMPENSATING CELL COMPRISING A MATERIAL WHICH IS HEATED TO A RELATIVELY LOW AND KNOWN LEVEL WHEN SUBJECTED TO SAID RADIATION, THE RECEIVING CELL HAVING A COAXIAL APERTURE FOR RECEIVING A CALIBRATION RESISTANCE; A SHELL SURROUNDING AND SPACED FROM EACH OF SAID CELLS; INSERT WASHERS DISPOSED BETWEEN SAID CELLS FOR INSULATING THE CELLS FROM EACH OTHER; TEMPERATURE DETECTING MEANS DISPOSED IN THE SPACE BETWEEN EACH CELL AND ITS ASSOCIATED SHELL AND IN THERMAL CONTACT THEREWITH, THE TEMPERATURE DETECTING MEANS BEING CONNECTED TO A MEASURING APPARATUS AND THE CALIBRATION RESISTANCES BEING CONNECTED TO A SOURCE OF CURRENT.