Small Prototype Gamma Spectrometer Using CsI(Tl) Scintillator Coupled to a Solid-State Photomultiplier Public Deposited

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  • Small solid-state photomultipliers (SSPMs) are an alternative scintillator light-detection technology to traditional photomultiplier tubes that offer advantages such as lower bias voltages and insensitivity to magnetic fields. A digital spectrometer using a commercially available SSPM was constructed and characterized at Oregon State University as a prototype for small, highly-mobile, low-power, robust spectroscopy devices. The SSPM has over 19,000 microcells in a photo-sensitive area of 6.32 x 6.32 mm and was coupled to 6 x 6 x 10 mm reflectively-coated CsI(Tl) crystals. The rest of the spectrometer consists of a fast preamplifier and 200 MHz, 12-bit digital pulse processor based around a field-programmable gate array (FPGA). The efficiency, resolution, linearity, and peak-to-Compton ratio of the system were characterized.
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  • Becker, E.M., Farsoni, A.T. Alhawsawi, A.M., & Alemayehu, B. (2013). Small prototype gamma spectrometer using CsI(tl) scintillator coupled to a solid-state photomultiplier. IEEE Transactions on Nuclear Science, 60(2), 968-972. doi:10.1109/TNS.2012.2228236
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