Tritium Production by 2.2-Bev Protons on Iron and Its Relation to Cosmic Radiation

Details Tritium Production by 2.2-Bev Protons on Iron and Its Relation to Cosmic Radiation Tritium Production by 2.2-Bev Protons on Iron and Its Relation to Cosmic Radiation

Mar 1955

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1955phrv...97.1303f&link_type=abstract

Physical Review, vol. 97, Issue 5, pp. 1303-1304

Physics

8

Scientific paper

The cross section for tritium production by 2.2-Bev protons on iron is measured to be 62+/-7 mb. This tritium cross section indicates that (1.4+/-0.4)×10-3 tritons/g sec would be produced in small iron meteorites (a few inches in radius) in space by cosmic rays of the intensity of those striking the earth's polar regions. In 4×109 years, (6+/-2)×10-6 cc of He3 per gram of iron results from this cosmic-ray tritium. Mount Ayliff meteorite contains 11.5×10-6 cc of He3 per gram, indicating its bombardment by a cosmic-ray flux at least as intense as is presently striking the earth. The variation of tritium with target depth is also measured and indicates a decrease less rapid than an attenuation due to geometric cross section.

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