Mathematics – Logic
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1461v&link_type=abstract
In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1461-1462 (SEE N94-20636 05-91
Mathematics
Logic
1
Carrier Transport (Solid State), Diamonds, Nitrogen, Pyrolysis, Rare Gases, Combustion, Xenon Compounds
Scientific paper
Light nitrogen and the HL family noble gas components of Cdelta appear to be separable by high resolution pyrolysis experiments. Thus Cdelta is not a homogeneous material and probably consists of debris of many stars. The question of whether the N and Xe(HL) actually reside in different carriers continues to be addressed. It is well known that Cdelta which was identified as nanometer sized diamonds contains isotopically anamalous elements, in particular noble gases including Xe(HL) and its family and light nitrogen (delta(N-15) down to -350 percent). Before the true nature of Cdelta was recognized, it was easy to suppose that the Xe(HL) and light nitrogen were located in the same carrier. However, recognition that light nitrogen in diamond from different samples varies by greater than a factor of six compared to Xe(HL) fluctuations of ca. 20 percent makes such an assumption questionable. On the basis of simple arithmetic logic, the Xe and nitrogen cannot be absolutely co-located. The average diamond grain consists of only about 1000-2000 atoms of carbon; one grain among a few x 106 contains an atom of Xe(HL) while 5-30 atoms of light nitrogen are the typical number which need to be in every diamond grain to account for observed concentrations. If some grains are devoid of N, the others have to have a higher N concentration. Even if we were able to analyze an individual grain of the diamond for noble gases and nitrogen, we would be faced with the monumental task of locating the one amongst 106 identical grains containing the Xe atom to examine its nitrogen content. The problem can be simplified to some extent if instead of Xe, He which is 104 times more abundant is assumed to be a member of the HL family. Attempts to fractionate the separate carriers might be attempted using He and N as guiding indicators but even experiments of this nature are for the future. Faced with apparently insoluble problems, we have returned to an investigation we last used in our original efforts to find isotopically light nitrogen, that is to compare release patterns of the different components during stepped pyrolysis and combustion.
Fisenko Anatolii V.
Pillinger Colin T.
Russell Stuart
Shukolyukov Yuri A.
Verchovsky Alexander B.
No associations
LandOfFree
Are the C delta light nitrogen and noble gases located in the same carrier? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Are the C delta light nitrogen and noble gases located in the same carrier?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are the C delta light nitrogen and noble gases located in the same carrier? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1450916