Open-source hardware and cost-effective gamma-ray spectrometer using Raspberry Pi Pico
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Radiation Physics and Chemistry
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This work presents the development and evaluation of the OpenGamma spectrometer, an open-source, compact and cost-effective gamma-ray detection system built on a Raspberry Pi Pico board. Data acquisition was performed using a GAGG scintillation crystal coupled with a Silicon Photomultiplier (SiPM). The background count rate was 5.24 counts per second. The system was evaluated with standard radioactive sources, achieving an energy resolution of 7.6% at 662 keV, which is comparable to other low-cost gamma spectrometers. The energy calibration curve exhibited a slightly quadratic behavior, typical for scintillation detectors. The dead time was estimated at 39.9 ± 3.9μs, reflecting the system’s capacity to process signals with minimal loss. The Gamma MCA web application further enhances the usability of the spectrometer by providing a user-friendly interface for data acquisition and analysis. The OpenGamma spectrometer offers a promising solution for applications in education, research, and field deployment. Future work will focus on improving its energy resolution and dead time to expand its use cases.
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BONIFACIO, D.A.B.; RODRIGUES, U.B.; ALCANTARA-NONESZ, J.; SANTOS, A.D. dos; CARVALHO, D.V.S.; MURATA, H.M.; PEROTONI, M.B.; MORALLES, M,; ROSEZKY, M. Open-source hardware and cost-effective gamma-ray spectrometer using Raspberry Pi Pico. Radiation Physics and Chemistry, v. 234, p. 1-11, 2025. DOI: 10.1016/j.radphyschem.2025.112728. Disponível em: https://repositorio.ipen.br/handle/123456789/49649. Acesso em: 29 Apr 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.