Radioactivite induite par le rayonnement cosmique dans la meteorite Granès

Details Radioactivite induite par le rayonnement cosmique dans la meteorite Granès Radioactivite induite par le rayonnement cosmique dans la meteorite Granès

Sep 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968gecoa..32..949m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 32, Issue 9, pp.949-963

Computer Science

1

Scientific paper

The activities of 14 radionuclides from the Granes meteorite which fell on 13 November 1964 were measured after chemical separation. The following results, expressed in dpm kg -1 at time of fall, were obtained: 10 Be: 23,4 ± 1,4; 26 Al: 37 ± 5; 41 Ca: 4,3 ± 1,9; 44 Ti: 1,8 ± 0,3; 45 Ca: 46 ± 6; 46 Sc: 18,5 ± 1,7; 49 V: 17 ± 4; 51 Cr: 118 ± 36; 53 Mn: 62 ± 8; 54 Mn: 57 ± 7; 55 Fe: 158 ± 17; 57 Co: 11 ± 3; 59 Ni: 10,5 ± 1,5; 60 Co: 6,4 ± 1,5. These results are discussed and compared with those obtained for the Harleton meteorite which is similar in mass and chemical composition. By dividing the radionuclides into three groups according to their half-lives (less than 3 months; between 9 months and 3 years; greater than 40 years) we have established that these two meteorites received essentially identical irradiations during their exposure to cosmic rays.

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