- cosmogenic nuclide
- 宇宙源核种
English-Chinese geology dictionary (英汉地质大词典). 2013.
cosmogenic nuclide
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Cosmogenic nuclide — See also Environmental radioactivity#Natural Cosmogenic nuclides (or cosmogenic isotopes) are rare isotopes created when a high energy cosmic ray interacts with the nucleus of an in situ solar system atom, causing cosmic ray spallation. These… … Wikipedia
Nuclide — A nuclide (from nucleus) is an atomic species characterized by the specific constitution of its nucleus, i.e., by its number of protons Z, its number of neutrons N, and its energy state.[1] Thus, all nuclides are atoms that have at least one… … Wikipedia
Cosmic ray spallation — Nucleosynthesis Stellar nucleosynthesis Big Bang nucleosynthesis Supernova nucleosynthesis Cosmic ray spallation … Wikipedia
Environmental radioactivity — is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium 90 (90Sr) and technetium 99 (99Tc), are only found on Earth as a result of human activity, and some, like potassium 40 (40K), are only… … Wikipedia
Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… … Wikipedia
John Gosse — Dr. John C. Gosse of Dalhousie University in Halifax, Nova Scotia is internationally known for his research in the field of geomorphology (the study of landforms), and is recognized as a world leader in investigating the rate of landscape… … Wikipedia
Isotopes of chlorine — Chlorine (Cl) has 24 isotopes with mass numbers ranging from 28Cl to 51Cl and 2 isomers (34mCl and 38mCl). There are two principal stable isotopes, 35Cl (75.78%) and 37Cl (24.22%), found in the relative proportions of 47.89:12.11, not 3:1,… … Wikipedia
Paleocene–Eocene Thermal Maximum — The Paleocene/Eocene boundary, Ma|eocene, was marked by the most rapid and significant climatic disturbance of the Cenozoic Era. A sudden global warming event, leading to the Paleocene Eocene Thermal Maximum (PETM, alternatively nowrap| Eocene… … Wikipedia
Veevers crater — is a meteorite impact crater located at latitude 22° 58 06 S and longitude 125° 22 07 E on a flat desert plain between the Great Sandy and Gibson Deserts in the center of the state of Western Australia, Australia. The site is very remote and… … Wikipedia
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Canadian university scientific research organizations — Expenditures by Canadian universities on scientific research and development accounted for about 40% of all spending on scientific research and development in Canada in 2006.Research in the natural and social sciences in Canada, with a few… … Wikipedia
