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Carbon-14 - Astrophysics Data System

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Last Updated: 10 September 2022

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Modelling the transport and deposition of Beryllium-10 and Carbon-14 with a high-resolution Earth system model

Large amounts of cosmogenic isotopes can be produced during solar proton events. EMAC has been extended with a basic model for net primary production in order to model ^14 C in vegetation. We find good agreement between the simulated ^10 Be surface fluxes and four separate proxy data sets from ice core analysis. Since ^10 Be results are restricted to the high latitudes, we also compare our simulations to lower latitude tree ring results. Tree rings data on ^14 C for both hemispheres is available here. Evidence for the solar origins of the cosmic-ray events of AD 774/5 and 993/4 is found by Multiradionuclide scientists. In AD 774-775 from tree rings in Japan, a sign of cosmic-ray rise.

Source link: https://ui.adsabs.harvard.edu/abs/2022cosp...44..909S/abstract


Assessment of different mechanisms of C-14 production in irradiated graphite of RBMK-1500 reactors

Two RBMK-1500 water-cooled graphite-moderated channel-type power reactors at the Ignalina Nuclear Power Plant are decommissioned now, according to the Ignalina Nuclear Power Plant. Two RBMK-1500 water-cooled graphite-moderated channel-type power reactors are decommissioned. Uncertainty in graphite's numerical estimation of graphite activity is the root of the most significant factor of uncertainty in the quantitative analysis of graphite activity, according to the uncertainness of the initial impurities content in graphite. Initial nitrogen impurity amounts in the graphite matrix and potential nitrogen quantities entrapped in the graphite pores from cooling gases were calculated in order to determine the C-14 activity dependence on the nitrogen impurity content.

Source link: https://ui.adsabs.harvard.edu/abs/2010Kernt..75..185N/abstract


Modelling of Carbon-14, Iodine-129 and Cesium-137 releases from near surface radioactive waste disposal and their impact on environment and humans

The most effective option for a long-term radioactive waste management is probably low and intermediate level radioactive garbage collection. It has been reported that the radionuclide transport time into the environment, its radioactive contamination, and radiation exposure to the public largely depend on radionuclide transport characteristics and reliable transport pathways from the repository to the environment.

Source link: https://ui.adsabs.harvard.edu/abs/2007Kernt..72..268A/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions