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Radioactivité induite par le rayonnement cosmique dans la météorite Granès

Author: Bibron R.
Blettmann D.
Leger C.
Mabuchi H.
Tobailem J.
Publication venue: 'Elsevier BV'
Publication date: 01/09/1968
Field of study

International audienceThe 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.On a mesuré les activités de 14 radionuclides contenus dans la météorite Granès tombée le 13 Novembre 1964; ces radionuclides ont été séparés par traitement chimique. Les résultats suivants exprimés en dpm kg

^{−1}

à la date de la chute ont été obtenus:

^{10}