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Determination of Li and B isotopic composition in the microvolumes of meteorites by a highly sensitive, precise method

โœ Scribed by M.Sh. Kaviladze; N.V. Gubadze

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
205 KB
Volume
161
Category
Article
ISSN
0168-1176

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โœฆ Synopsis

A local precise method of isotopic analysis on the detection level of 10-13-10 -~4 g is presented. The measurements were carried out using a Mattauch-Herzog-type mass spectrometer with a laser-ion source in which is also placed a rhenium doublefilament source; as a detector, a micro-channeled plate is used. The sample is transferred from the meteorite to the rectifier by laser. The investigation shows that in the seven meteorites studied, significant variations of the isotopic ratios 7Li/6Li and 11B/~ยฐB exceeding 1% are not observed.

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