The Torino, H6, meteorite shower

Details The Torino, H6, meteorite shower The Torino, H6, meteorite shower

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989metic..24...29b&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 24, March 1989, p. 29-34.

Computer Science

35

Chondrites, Meteoritic Composition, Meteoroid Showers, Petrography, Ablation, Cosmic Rays, Radioactive Age Determination, Radioactive Isotopes, Meteorites, Torino, H6 Chondrites, Meteor Showers, Petrography, Ablation, Samples, Meteorite, Chemistry, Laboratory Studies, Exposure Age, Tracks, Radioisotopes, Size, Classification, Cosmic Rays, Photographs, Rare Gases

Scientific paper

A meteorite shower fell at Torino, Italy on May 18, 1988. Petrographic studies indicate that the stone is an H6 chondrite having features of moderate to severe shock. Chemical analyses of the meteorite are reported. Cosmic ray produced He-3, Ne-21 and Xe-126 yield an exposure age of about 48 Ma. The cosmic ray track densities in three fragments range between 1.8 to 5 x 10 to the 5th/sq cm suggesting about 99 percent mass ablation in the atmosphere,. Twelve radioisotopes with half lives ranging between 5.6 days to 7.3 x 10 to the 5th years have been measured with high precision. Marginal signals were observed for several short-lived nuclides and upper limits were obtained for the activity levels of eight radionuclides, some of which have not been hitherto detected in fresh falls. The data are generally consistent with the nuclide production by galactic cosmic rays when modulation due to the solar cycle is taken into consideration.

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