• Nirja Sindhav
• Arpit Patel
• Dipak Kumar Panda
• Paresh Dholakia

Gamma ray is a well-established technique to measure the chemical composition of planetary surface. These high energetic gamma radiations are mostly are detected either by semi-conductor detector or scintillation detector. The interaction of Gamma radiations with the scintillation detector produces visible lights. This visible light is guided to photo-multiplier tube (PMT) through light guide to produce a bunch of electrons. CSPA (charge sensitive pre-amplifier) has been used to converts these electrons to voltage. To achieve an optimized the resolution the signal from the preamplifier is shaped and amplified to Gaussian shape. The pulse height information can be deduced by either detecting the peak of the pulse or digitizing through successive ADC. But in this paper we have presented new peak detection method. The peak of the amplified Gaussian shaped signal has been discharged linearly to fetch the maximum energy and time information. Conversion of the analog signal is to be done in digital through comparator and the measurement of the pulse width is carried out. This width gives the energy of the signal and ultimately the counter starts counting the pulses in the defined time. This count provides the information related to the energy of the gamma ray and from these the abundance of the element can be calculated. The output of the system is gathered in the data acquisition system. This design needs some controlling signal for initiating and fetching data which will be generated through FPGA. The coding for the FPGA is to be done in the VeriLOG language. FPGA has an internal PLL which generates clock at 320 Mhz. we are measuring the pulse width with help of PLL clock in counting mode.

Gamma Ray Spectrometer, Peak Detection Techniques, FPGA, Mixed Pulse Processing.

"Development of New Peak Detection method for Nuclear Spectroscopy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 5, page no.1638-1644, May-2015, Available :http://www.jetir.org/papers/JETIR1505055.pdf

"Development of New Peak Detection method for Nuclear Spectroscopy", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 5, page no. pp1638-1644, May-2015, Available at : http://www.jetir.org/papers/JETIR1505055.pdf