natural abundance

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natural abundance

[′nach·rəl ə′bən·dəns]
(nucleonics)
The abundance ratio of an isotope in a naturally occurring terrestrial sample of an element.
References in periodicals archive ?
The OSIRIS-REx Thermal Emission Spectrometer (OTES) will conduct surveys to map mineral and chemical abundances and to take the asteroid Bennu's temperature.
Molecular Astrophysics provides a new publishing platform for scientists studying chemical processes that form and deconstruct molecules, and control chemical abundances in the universe.
The team next aims to make water-abundance measurements for different planets to explore their chemical abundances.
The closing papers describe the large millimeter telescope (LMT) project in Mexico, the planet hunting and astero-seismology explorer spectrophotometer (PHASES) project, the Cananea high resolution spectrograph for determining stellar chemical abundances, and the scintillator cosmic ray super telescope.
The fundamental observations that corroborate the Big Bang are the cosmic microwave radiation and the chemical abundances of the light elements described in the Big Bang nucleosynthesis theory.
Chemical abundances in meteorites suggest that the birth of our own solar system may have been triggered by a shock wave from a supernova.
With a better handle on the star's brightness Bond's team refined the star's age by applying contemporary theories about the star's burn rate, chemical abundances, and internal structure.
Line profiles can be used to determine chemical abundances as well as temperature.
However, these particular galaxies are unusual because they have chemical abundances that suggest very little stellar evolution has taken place within them.
It will be used to study galaxy and star formation, chemical abundances, active galactic nuclei and more.
Najarro produced detailed models to confirm the masses, chemical abundances and ages of the Arches cluster stars.

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