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The concentration and location of some natural isotopes, particularly uranium-238, can be affected by human activity.The translations of cosmogenic from English to other languages presented in this section have been obtained through automatic statistical translation; where the essential translation unit is the word «cosmogenic» in English.The graph expresses the annual evolution of the frequency of use of the word «cosmogenic» during the past 500 years.Its implementation is based on analysing how often the term «cosmogenic» appears in digitalised printed sources in English between the year 1500 and the present day.Geological structures, reminiscent in shape of craters and found on all continents, have been understood to be traces of collisions of meteor bodies ...Surface exposure dating is a collection of geochronological techniques for estimating the length of time that a rock has been exposed at or near Earth's surface.When one of these particles strikes an atom it can dislodge one or more protons and/or neutrons from that atom, producing a different element or a different isotope of the original element.In rock and other materials of similar density, most of the cosmic ray flux is absorbed within the first meter of exposed material in reactions that produce new isotopes called cosmogenic nuclides.
Click on a title to look inside that book (if available): by Andrew Goudie Cosmogenic dating is a group of related techniques for estimating landform ages and erosion rates. A dating system that uses the isotopes26Al and 10Be that are produced in quartz when neutrons, protons, and muons penetrate the upper few meters of the Earth. by Vivien Gornitz Cross-references Glacial geomorphology Glacial isostasy Glaciations, Quaternary Laurentide Ice Sheet Quaternary climate transitions and cycles Sea level change, Quaternary COSMOGENIC RADIONUCLIDES In contrast to stable isotopes, ... (bring on; cause; bring about; raise; provoke; entail), (causal agent; cause; causal agency), (leaning; trend; tendency; inclination; disposition; propensity), (basal; basic; elementary; base; standard), (vector; transmitter) Webmaster Solution Alexandria A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage.Give contextual explanation and translation from your sites !A detailed analysis of the incoming cosmogenic neutrino flux, neutrino attenuation, stau production, and stau energy loss shows that there is an optimal nadir angle for which the stau signal is a factor of several hundred larger than the ...
5.1 Long-Term Variations in Sunspots and Cosmogenic Isotopes The longest sequence of measurements relevant to solar variability is the sunspot number.These particles interact with atoms in atmospheric gases, producing a cascade of secondary particles that may in turn interact and reduce their energies in many reactions as they pass through the atmosphere.