Computer Science
Scientific paper
Mar 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..527b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 37, Issue 3, pp.527-546
Computer Science
17
Scientific paper
The concentrations of noble gas isotopes of He, Ne and Ar have been measured in eight mineral separates of the Bruderheim chondrite. The cosmic-ray-produced nuclides 21 Ne and 38 Ar were correlated by a computer least-squares fitting program with the elemental composition in each separate of potential targets for nuclear production yielding the following production equations: [ 21 Ne , 10 -8 cm 3 / g ] = k (0.45[ Mg ] + 0.085[ Si ] + 0.060[ S ] + 0.017[ Ca ] + 0.0044[ Fe + Ni ]); [ 38 Ar , 10 -8 cm 3 / g ] = k (2.6[ K ] + 0.37[ Ca ] + 0.08[ Ti + Cr + Mn ] + 0.021[ Fe + Ni ]) with elemental concentrations in weight per cent and k equal to the reciprocal of the cosmic-ray exposure age of Bruderheim. The P ( S )/ P ( Cr + Mn + Fe + Ni ) weight production ratio for 3 He was determined to be 1.53; relative productions of 3 He from O, Mg and Si and 21 Ne from Al proved to be incalculable.
Bogard Donald D.
Cressy Philip J. Jr.
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