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Cosmogenic nuclides (or
cosmogenic isotopes) are rare
nuclides (isotopes)
created when a high-energy
cosmic ray
interacts with the
nucleus of an in situ...
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between 103 and 106 years. The most
common of
these dating techniques is
cosmogenic radionuclide dating.
Earth is
constantly bombarded with
primary cosmic...
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precipitation quickly becomes more alkaline,
beryllium drops out of solution.
Cosmogenic 10Be
thereby ac****ulates at the soil surface,
where its
relatively long...
- A
Miyake event is an
observed sharp enhancement of the
production of
cosmogenic isotopes by
cosmic rays. It can be
marked by a
spike in the concentration...
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stable isotopes and one
naturally occurring radioactive isotope, the
cosmogenic isotope 36Cl. Its half-life is 301,300 ± 1,500 years. 36Cl
decays primarily...
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directly with
cosmic rays. The latter, if non-primordial, are
called cosmogenic nuclides.
Other types of
natural nuclear reactions produce nuclides that...
- beryllium, and boron—as well as the
isotope helium-3. This
process (
cosmogenic nucleosynthesis) was
discovered somewhat by
accident during the 1970s:...
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three categories:
primordial radionuclides,
secondary radionuclides, and
cosmogenic radionuclides.
Radionuclides are
produced in
stellar nucleosynthesis and...
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isotopic analysis of
exposed terrestrial rocks has
demonstrated the
cosmogenic (cosmic ray)
production of 21Ne. This
isotope is
generated by spallation...
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carbon radioisotope found in nature, as
trace quantities are
formed cosmogenically by the
reaction 14 N + n → 14 C + 1 H . The most
stable artificial radioisotope...
