Computer Science
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980znata..35..267i&link_type=abstract
Zeitschrift für Naturforschung, Teil a, vol. 35a, Mar. 1980, p. 267-279.
Computer Science
6
Meteorites, Distribution, Spallogenic Gases, Potassium, Calcium, Size, Titanium, Vanadium, Manganese, Isotopes, Iron Meteorites, Nuclides, Cosmic Rays, Grant Meteorite, Treysa Meteorite, Rare Gases, Experiments, Samples, Meteorite, Chemistry, Spectrometry, Analysis, Spallation, Data, Exposure Ages, Intensity, Cosmogenic Elements
Scientific paper
Cosmic-ray-produced stable nuclides of Ca (mass number: 42, 43, 44 and 46), Ti (46, 47, 49 and 50), V (50), Cr(50, 53 and 54) and the long-lived nuclides, K-40 and Mn-53 were determined along the radial axes of the iron meteorites Grant and Treysa. Grant was extensively examined and the results compared with rare gas data. Although Treysa does not include enough samples to allow detailed analysis, the depth profile shows typical features for a small meteorite. The results were compared with calculated profiles of K-40, Ti-49, and Mn-53 using thick bombardment data. The approximate pre-atmospheric radii of Grant and Treysa were determined to be 30 cm and 14 cm, respectively. The effect of space erosion was also estimated by comparing the data of Ti-49 and radioactive Mn-53 in Grant and Treysa with the calculated patterns. It is suggested that space erosion of both meteorites is small during the cosmic-ray exposure of several hundred million years.
Honda Makoto
Imamura Mineo
Shima Masako
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