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Towards the optimal performance of Mazinger, a shallow [formula omitted]-ray spectrometry system of high efficiency and very-low-level background, devoted to [formula omitted] and U–Th dating for paleoclimatic applications.

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Title: Towards the optimal performance of Mazinger, a shallow [formula omitted]-ray spectrometry system of high efficiency and very-low-level background, devoted to [formula omitted] and U–Th dating for paleoclimatic applications.
Authors: Rivas-Gómez, R.1 (AUTHOR) rubenrivas@usal.es, Romero-Fuentes, D.1 (AUTHOR), Quintana-Arnés, B.1 (AUTHOR), Carballeira, R.2 (AUTHOR)
Source: Applied Radiation & Isotopes. Mar2026, Vol. 229, pN.PAG-N.PAG. 1p.
Subjects: Gamma ray spectrometry, Gamma ray spectrometer, Detectors, Geological time scales, Nuclear activation analysis, Radioactive pollution, Sediment analysis
Abstract: Precise radionuclide measurements are crucial for absolute dating in paleoclimatic studies. Mazinger, a very-low-level background and high-efficiency γ -ray spectrometer, was upgraded with two anti-muon veto detectors and its acquisition electronics have been reconfigured, both to improve detection limits and handle higher event rates coming from the veto system. The upgrade led to a doubling of Mazinger's figure of merit and significantly reduce the background level. These improvements enhance Mazinger's performance for geochronological applications. Application to 210Pb dating of a low-level activity sediment core from Sobrado Lagoon (Spain) produced an age model with uncertainties under 5%, matching correctly with the 137Cs profile. • Dual anti-muon veto implementation reduced total background level by a factor of 4. • Acquisition electronics reconfigured, doubling the system's figure of merit. • 210Pb dating achieves <5% age uncertainty in low-level sediments. • Age results validated by 137Cs profile. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Precise radionuclide measurements are crucial for absolute dating in paleoclimatic studies. Mazinger, a very-low-level background and high-efficiency γ -ray spectrometer, was upgraded with two anti-muon veto detectors and its acquisition electronics have been reconfigured, both to improve detection limits and handle higher event rates coming from the veto system. The upgrade led to a doubling of Mazinger's figure of merit and significantly reduce the background level. These improvements enhance Mazinger's performance for geochronological applications. Application to 210Pb dating of a low-level activity sediment core from Sobrado Lagoon (Spain) produced an age model with uncertainties under 5%, matching correctly with the 137Cs profile. • Dual anti-muon veto implementation reduced total background level by a factor of 4. • Acquisition electronics reconfigured, doubling the system's figure of merit. • 210Pb dating achieves <5% age uncertainty in low-level sediments. • Age results validated by 137Cs profile. [ABSTRACT FROM AUTHOR]
ISSN:09698043
DOI:10.1016/j.apradiso.2026.112419