Development Of Gamma Spectroscopy Employing Nai(Tl) Detector 3 Inch X 3 Inch And Readout Electronic Of Flash-Adc/Fpga-Based Technology
KERNTECHNIK(2015)
Abstract
In this article the development of a gamma spectroscopy system is described using a scintillation detector NaI(Tl) of 3 inch x 3 inch. The readout electronic for the spectroscopy is built from the fast analog-digital conversion of Flash Analog-Digital Converter (Flash-ADC) 250 MHz - 8 bits resolution, and the embedded Field-Programmable Gate Array (FPGA) technology. The embedded VHSIC Hardware Description Language (VHDL) code for FPGA is built in such a way that it works as a multi channel analyser (MCA) with 4096 Digital Charge Integration (DCI) channels. A pulse generator with frequency varying from Hz up to 12 kHz is used to evaluate the time response of the system. Two standard radioisotope sources of Ba-133 and Eu-152 with multi gamma energies ranging from several tens keV to MeV are used to evaluate the linearity and energy resolution of the system.
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Key words
gamma,spectroscopy,flash-adc,fpga-based
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