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IODP Expedition 399 Natural gamma radiation
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IODP Expedition 399 Natural gamma radiation

Susan Q. Lang, Andrew McCaig, Peter Blum, Natsue Abe, William Brazelton, Rémi Coltat, Jeremy R. Deans, Kristin L. Dickerson, Marguerite Godard, Barbara E. John, …
International Ocean Discovery Program
05/03/2025
DOI: 10.5281/zenodo.15499234
url
https://doi.org/10.5281/zenodo.15499234View
Open Access

Abstract

Natural gamma radiation (NGR) data in the ~0.1 to 3.0 MeV range were measured using eight custom-designed sodium iodide (thallium) [NaI(Tl)] detectors arranged along the core measurement axis at 20 cm intervals. The NGR system uses layers of passive shielding (lead) and active shielding (plastic scintillators and coincidence electronics) to reduce the cosmic-ray signal for low-count analysis of sediment core sections and to obtain the maximum signal-to-noise ratio. Data are reported on a total counts per second basis and the raw spectral files are available as compressed files for later analysis.
Atlantis Massif deep biosphere detachment fault Expedition 399 International Ocean Discovery Program IODP JOIDES Resolution Lost City hydrothermal field peridotite mantle serpentinization Site U1309 Site U1601

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