Abstract
The volume concentration of carbon and nitrogen in different meteorites was determined by gamma-ray activation analysis on a microtron. The 11C and 13N radionuclides forming in photoneutron reactions were isolated by high-temperature extraction; their positron activity was then deactivated by the method of gamma–gamma coincidence of annihilation gamma quanta. A clear correlation was found between the sample darkness and the carbon concentration; the latter was at a level of 10−2 wt %. No correlations was observed for nitrogen; its concentration was one order of magnitude lower than that of carbon and varied over the range (2–6) × 10−3 wt %. The results obtained suggest that carbon entered different structural defects in chondrites as a result of its redistribution upon gaseous activity on parent bodies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
