yugioh dating sim - Radiometric dating of meteorites from another solar system
Although this is so short that all of it has decayed billions of years ago, its presence at the beginning of the solar system has been conclusively established by the discovery of excesses of its daughter isotope Magnesium isotopic ratios measured in different minerals with different ratios of aluminum to magnesium from a refractory inclusion in the meteorite Allende [Data link].
Mg, a stable isotope, with a half-life of 0.73 million years.
With my collaborators Christa Göpel (Laboratoire Géochimie et Cosmochimie, Paris, France) and Peter Hoppe (Max-Planck-Institut für Chemie, Mainz, Germany) I selected feldspar grains from two ordinary chondrites of type H4, Ste.
Marguerite [Data link] and Forest Vale [Data link], for such a comparative study.
In this instrument a finely focused ion beam (in our case oxygen) bombards the surface of the sample to be analyzed (in our case polished thin sections of the meteorites).