SAYISAL SİNYAL İŞLEME SİSTEMİ İLE YÜKSEK ÇÖZÜNÜRLÜKLÜ RADYASYON SPEKTROSKOPİSİNİN ELDE EDİLMESİ VE KALİBRASYONU - OBTAINING HIGH-RESOLUTION RADIATION SPECTROSCOPY BY DIGITAL SIGNAL PROCESSING SYSTEM AND ITS CALIBRATION

In this study, the gamma-ray energy spectrum of 137Cs radioactive source was obtained as high resolution using digital signal processing system. Obtained analog signals from radiation source were collected converting to digital signal via established computer aided measurement system which both 14-bit resolution and 100MS/s real time sampling rate. The high resolution spectroscopy of 137Cs radiation source were improved by LabviewTM algorithms. Since the PCI 5122 card has two channels, uncalibrated scintillation detector is compared with precisely known correctness of calibrated scintillation detector. This calibration process helps to find the deviation of the indications relating to uncalibrated scintillation detector with regard to true value of calibrated scintillation detector