Measurement of cosmic ray produced Mn-53 in deep sea metallic spherules

Details Measurement of cosmic ray produced Mn-53 in deep sea metallic spherules Measurement of cosmic ray produced Mn-53 in deep sea metallic spherules

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icrc....2..288n&link_type=abstract

In: International Cosmic Ray Conference, 16th, Kyoto, Japan, August 6-18, 1979, Conference Papers. Volume 2. (A81-12386 02-93) T

Physics

Cosmic Rays, Extraterrestrial Matter, Manganese Isotopes, Ocean Bottom, Radiation Measurement, Ablative Materials, Micrometeoroids, Neutron Activation Analysis, Sea Water, Spherules

Scientific paper

Cosmic ray originated Mn-53 nuclides were measured in deep sea metallic spherules by neutron activation analysis. The spherules may be fused micrometeoroids or ablation droplets from larger objects; the low activities of Mn-53 may indicate its evaporation loss resulting from the heating in the earth's atmosphere or short exposure age. The Mn-53 nuclide is now being measured in chondritic spherules, and Be-10 and Cl-36 concentrations are determined in individual spherules using ion counting methods.

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