Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very l...Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.展开更多
<sup>10</sup>Be is mainly produced in meteorite by spallation reactions of cosmic ray particles with oxygen, magnesium, silicon or nitrogen in it. The threshold energy is above 500 MeV. The half lifetime o...<sup>10</sup>Be is mainly produced in meteorite by spallation reactions of cosmic ray particles with oxygen, magnesium, silicon or nitrogen in it. The threshold energy is above 500 MeV. The half lifetime of <sup>10</sup>Be in between <sup>26</sup>Al and <sup>53</sup>Mn is 1.6 Ma. Thus the possibility of routine determination of <sup>10</sup>Be in a large number of meteorites constitutes an improvement in studying the exposure conditions of展开更多
文摘Based on the proposal by Witten,De Rujula and Glashow,we carried out the experimental search on two meteorites for the fossil tracks formed by cosmic nuclearites with masses ranging from M~6×10^(-4)g up to very large mass.An upper limit 2km-2y-1(2πsr)-1 was obtained for the cosmic nuclearites with masses larger than 6×10^(-4)g which passed through these meteorites.
文摘<sup>10</sup>Be is mainly produced in meteorite by spallation reactions of cosmic ray particles with oxygen, magnesium, silicon or nitrogen in it. The threshold energy is above 500 MeV. The half lifetime of <sup>10</sup>Be in between <sup>26</sup>Al and <sup>53</sup>Mn is 1.6 Ma. Thus the possibility of routine determination of <sup>10</sup>Be in a large number of meteorites constitutes an improvement in studying the exposure conditions of
