Beta radiation is the emission of an electron from the nucleus of a radioactive isotope .
some elements have only one stable isotope
Ecologists see these isotopic ratios of carbon, hydrogen, oxygen, and nitrogen as signatures.
When uranium is bombarded with neutrons, the two isotopes have differing nuclear reactions.
Normally the proportion of the two isotopes of carbon is simply controlled by the rate of photosynthesis in plant tissues.
During interglacial periods the ice caps melt and return the isotopically light water to the oceans, where it mixes rapidly.
Consequently, white mica populations and even individual grains may represent compositionally and isotopically heterogeneous systems.
It is an excellent piece of work which considers loop and quasigroup identities that are invariant under isotopy , proving a number of very interesting results.
Winter and summer laminae differences are significant and are isotopically depleted with respect to water column organic carbon.
This points to a minor influence of diagenetic carbonate on the isotopic signal.