Digital Coincidence Counting (DCC) is a new technique in radiation metrology, based on the older method of analogue coincidence counting. It has been developed by the Australian Nuclear Science and Technology Organization (ANSTO), in collaboration with the National Physical Laboratory (NPL) of the United Kingdom, as a faster more reliable means of determining the activity of ionizing radiation samples. The technique employs a dual channel analogue-to-digital converter acquisition system for collecting pulse information from a 4 π beta detector and an NaI(Tl) gamma detector. The digitized pulse information is stored on a high-speed hard disk and timing information for both channels is also stored. The data may subsequently be recalled and analyzed using software-based algorithms. In this letter we describe some recent results obtained with the new acquisition hardware being tested at ANSTO. The system is fully operational and is now in routine use. Results for 60Co and 22Na radiation activity calibrations are presented, initial results with 153Sm are also briefly mentioned.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment|
|Publication status||Published - 1 Aug 2000|