Identification of heavy-particle cosmic-ray tracks in minerals from meteorites

Otgonsuren, O.; Perelygin, V.P.

doi:10.1007/bf01125643

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Fossil Track Study In Meteorite Olivine Crystals1

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1991

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“…At the first stage of the investigations, performed in the LNR of JINR during 1973-1979 large transparent meteoritic olivine crystals from pallasites [13] were chosen as an object of the study of galactic cosmic nuclei tracks [14].…”

Section: Fossil Track Study In Meteorite Olivine Crystalsmentioning

confidence: 99%

Analysis of the results of calibrating meteoritic olivine crystals with238U nuclei at the Bevalac accelerator

Perelygin

Стеценко

Crawford

et al. 1991

Z. Physik A - Hadrons and Nuclei

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The results are presented of calibrating the sensitivity of olivine crystals from meteorites by the 23sU nuclei produced at the Bevalac accelerator. The comparative studies of the spectra of the etchable track lengths due to the 23su nuclei and to "fossil" tracks in these olivines have shown that the group of the 210 gm "fossil" tracks observed in 1980 at the LNR, JINR is due to the galactic cosmic-ray nuclei of the Th-U group. As regards the origin of the 340-360 gm group of "fossil" tracks which were considered in [2] to be candidates for superheavy nuclei in cosmic rays the presence of the track with a length of up to 360 gm in the calibrating 23sU track length spectra indicates that the above interpretation has to be questioned. The possible ways of the unambiguous identification of the group of the abnormally long "fossil" tracks are discussed.

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Section: Fossil Track Study In Meteorite Olivine Crystalsmentioning

confidence: 99%