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Production Rate of 10Be from Oxygen Spallation

Nature volume 223, pages 1263–1264 (1969)Cite this article

Abstract

WHEN oxygen is spallated with high energy protons, one of the possible reaction products is the radionuclide 10Be (half-life, 2.7 × 106 yr). Knowledge of the cross-section for this reaction is of considerable importance in cosmic ray physics1 and nuclear astrophysics2, but the direct measurements that exist for this are in disagreement by a factor of about 8. Honda and Lal3 measured 10Be radiochemically in a carbon target bombarded with 220 MeV protons and gave a value for its production cross-section as (1.8 ± 0.6) mb. This becomes 2.2 mb after correction for the latest monitor cross-section. Honda and Lal also found a similar value in a target. The correctness of these measurements and their applicability to the spal-lation of atmospheric air nuclei have been demonstrated by the good agreement between the measured deposition rate of cosmogenic 10Be from atmospheric fall-out with the calculated “global” production rate based on the cross-section data4.

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  1. Department of Chemistry, Indian Institute of Technology, Kanpur, Kanpur, UP, India

    P. S. GOEL

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GOEL, P. Production Rate of 10Be from Oxygen Spallation. Nature 223, 1263–1264 (1969). https://doi.org/10.1038/2231263a0

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