Results 131 to 140 of about 380 (177)
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Cosmogenic nuclides in extraterrestrial materials
Reviews of Geophysics, 1990The nuclides made in extraterrestrial materials by cosmic rays help reveal the histories both of the irradiated objects and of the cosmic rays. Improvements in measurement techniques, especially in accelerator mass spectrometry, have greatly reduced detection limits.
S. Vogt, G. F. Herzog, R. C. Reedy
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2017
Abstract Cosmogenic nuclides are produced by the interaction of energetic elementary particles of galactic cosmic radiation (GCR) and their secondaries with atomic nuclei in extraterrestrial or terrestrial material. In extraterrestrial samples cosmogenic nuclides produced by energetic particles emitted by the Sun (SCR) are also ...
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Abstract Cosmogenic nuclides are produced by the interaction of energetic elementary particles of galactic cosmic radiation (GCR) and their secondaries with atomic nuclei in extraterrestrial or terrestrial material. In extraterrestrial samples cosmogenic nuclides produced by energetic particles emitted by the Sun (SCR) are also ...
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Cosmogenic nuclides in the Kirin chondrite
Earth and Planetary Science Letters, 1982Abstract Radioactive and stable cosmogenic nuclides have been determined in the various fragments of the Kirin chondrite (H5). Experimental results obtained from our samples are described and compared with similar data obtained in other laboratories.
M. Honda +6 more
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A model for the production of cosmogenic nuclides in chondrites
Geochimica et Cosmochimica Acta, 1990A model is presented for calculating the production rates of cosmic-ray-produced He, Ne, and Ar as well as Be-10, Al-26, and Mn-53 in chondrites of variable size and shape. The predictions of this model are compared with published data for the meteorites ALH78084, St. Severin, and Keyes.
Th Graf, H Baur, P Signer
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COSMOGENIC NUCLIDE DATING | Overview
2007Cosmic rays that have sufficient energy to break the intranuclear bonds of nucleons interact with nuclei in minerals exposed within the upper few meters of the Earth's surface. Concentrations of cosmogenic nuclides produced in situ from these interactions are proportional to the amount of time the mineral has been exposed to cosmic radiation. Currently,
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The Nuts and Bolts of Cosmogenic Nuclide Production
Elements, 2014Over the last 60 years, our understanding of how cosmic rays produce cosmogenic nuclides has grown from basic physical considerations. We introduce the different types of cosmic ray particles and how their flux varies with altitude, latitude, and time.
T. J. Dunai, N. A. Lifton
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Quaternary Geochronology, 2015
Abstract Characteristics of the spallogenic component of nuclide production are investigated through the use of a physics-based model. Calculated production rates for commonly used nuclides indicate differences in scaling up to 15% at very high altitude.
David C. Argento +3 more
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Abstract Characteristics of the spallogenic component of nuclide production are investigated through the use of a physics-based model. Calculated production rates for commonly used nuclides indicate differences in scaling up to 15% at very high altitude.
David C. Argento +3 more
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Cosmogenic Nuclides and Erosion at the Watershed Scale
Elements, 2014Landscapes are sculpted by a variety of processes that weather and erode bedrock, converting it into soils and sediments that are moved downslope. Quantifying erosion rates provides important insights into a wide range of questions in disciplines from tectonics and landscape evolution to the impacts of land use.
D. E. Granger, M. Schaller
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Dating Fan Deposits with Cosmogenic Nuclides
2012Cosmogenic nuclides (3He, 10Be, 14C, 21Ne, 26Al, 36Cl) are produced in minerals due to nuclear reactions induced by cosmic rays. Measured cosmogenic nuclide concentrations are used to determine how long rocks and sediment have been exposed at or near the surface of the earth.
Susan Ivy-Ochs +3 more
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