Presolar diamonds in Krymka: C, N and Xe isotope data from grain-size separates and comparison with other meteorites

PRESOLAR DIAMONDS IN KRYMKA: C, N AND Xe ISOTOPE DATA FROM GRAIN-SIZE SEPARATES AND COMPARISON WITH OTHER METEOROTES

A new isotopically normal heavy noble gas component in presolar diamonds from Boriskino revealed by grain size separation

Xe-Ar systematics in grain-size fractions of presolar diamonds separated from the Boriskino carbonaceous chondrite show the presence of an isotopically normal component released at low temperatures (in addition to P3). Introduction. Analysis of presolar diamonds separated into grain-size fractions by means of ultracentrifugation [1] provides an insight into the mechanism and history of how the ...

А New Isotopically Normal Heavy Noble Gas Component in Presolar Diamonds from Boriskino Revealed by Grain Size

Xe-Ar systematics in grain-size fractions of presolar diamonds separated from the Boriskino carbonaceous chondrite show the presence of an isotopically normal component released at low temperatures (in addition to P3). Introduction. Analysis of presolar diamonds separated into grain-size fractions by means of ultracentrifugation [1] provides an insight into the mechanism and history of how the ...

Is Xe - Hl a Real Component ?

Introduction. It is known that Xe-HL represents a mixture of (i) rand p-process isotopes generated in a supernova with (ii) isotopically normal Xe identified by the presence of s-process Xe. The question of whether the ultimate mixture of these components has occurred before implantation into presolar diamonds, or whether the components have been implanted separately remains unanswered. Based o...

Presolar Diamond in Meteorites

Presolar diamond, the carrier of the isotopically anomalous Xe component Xe-HL, was the first mineral type of presolar dust that was isolated from meteorites. The excesses in the light, p-process only isotopes Xe and Xe, and in the heavy, r-process only isotopes Xe and Xe relative to the solar ratios indicate that Xe-HL was produced in supernovae: they are the only stellar source where these tw...