Patent ID: 8147134

Claim:
A method of making both isotope identification and radioactivity measurement of alpha-emitting radionuclides by using a low temperature detector, comprising the following steps in the following order: a first step (S 100 ) to make a 4 π metallic absorber with a metal foil ( 10 ) which encloses radioactive material 11 , containing alpha-emitting radionuclides; a second step (S 200 ) to make a thermal connection between the metal foil ( 10 ) and the low temperature detector and to locate the low temperature detector on measuring means ( 40 ); a third step (S 300 ) to obtain temperature pulses according to temperature changes caused by the complete absorption of the total decay energy of each alpha decay; and a fourth step (S 400 ) to make isotope identification and radioactivity measurement of every alpha-emitting radionuclide in the metal foil by measuring the size and the number of temperature signals.