Measurement of carbon in ordinary chondrites with a nuclear microprobe

Details Measurement of carbon in ordinary chondrites with a nuclear microprobe Measurement of carbon in ordinary chondrites with a nuclear microprobe

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nimpb..49..514m&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section B, Volume 49, Issue 1-4, p. 514-517.

Physics

4

Scientific paper

Carbon concentrations were determined in the matrix of 17 ordinary chondrites by measuring the protons produced in the 12C(d, p)13C reaction. These experiments required improvements of the vacuum conditions in the nuclear microprobe setup to reduce the carbon deposition on the irradiated spot during the measurements. The samples were prepared on an absolutely C free basis. The results show that 13 chondrites have matrix C content between 200 and 1900 ppm, while the other 4 have substantionally higher C concentrations. This implies that the measured chondrites might have a similar matrix which does not significantly change with increasing petrologic types.

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