- protactinium dating
- 镤年代测定法
English-Chinese geology dictionary (英汉地质大词典). 2013.
protactinium dating
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Protactinium — thorium ← protactinium → uranium Pr ↑ Pa ↓ … Wikipedia
protactinium-231–thorium-230 dating — ▪ geology method of age determination that makes use of the quantities of certain protactinium and thorium isotopes in a marine sediment. Protactinium and thorium have very similar chemical properties and appear to be precipitated at the… … Universalium
Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… … Wikipedia
Uranium-uranium dating — is a radiometric dating technique utilizing the comparison of two isotopes of uranium (U) in a sample: 234U and 238U. 234U/238U dating is one of several radiometric dating techniques exploiting the uranium radioactive decay series, in which 238U… … Wikipedia
Jiří Březina — Jiří Březina, born April 6, 1933 in Prague, Czechoslovakia, is a German scientist of Czech origin, a professor of Geology, and an expert in Sand Texture Sedimentology. In 1979 he developed an equation for drag coefficient of a sedimenting… … Wikipedia
radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… … Universalium
Actinide — The atomic bomb dropped on Nagasaki had a plutonium charge.[1] The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium thro … Wikipedia
Principal cosmogenic and uranium-thorium series radioisotopes — ▪ Table Principal cosmogenic and uranium thorium series radioisotopes radioisotope half life in years principal uses Cosmogenic isotope beryllium 10 1.5(106) dating marine sediment, manganese nodules, glacial ice, quartz in rock exposures,… … Universalium
Timeline of chemical elements discoveries — The discovery of the elements known to exist today is presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element,[clarification needed] as the exact date of discovery… … Wikipedia
Decay chain — In nuclear science, the decay chain refers to the radioactive decay of different discrete radioactive decay products as a chained series of transformations. Most radioactive elements do not decay directly to a stable state, but rather undergo a… … Wikipedia
Isotope geochemistry — is an aspect of geology based upon study of the relative and absolute concentrations of the elements and their isotopes in the Earth. Broadly, the field is divided into two branches: stable and radiogenic isotope geochemistry.Lead lead isotope… … Wikipedia
