Abstract
THIN targets of oxygen-18, prepared by bombarding silver plates in an electromagnetic isotope separator at mass number 20 with water vapour in the ion source, were bombarded with protons (400–750 keV.) in a Cockcroft–Walton accelerator. The thin-target yield of α-particles within a cone of top angle 17° at 90° to the incident beam was studied with a proportional counter, the window thickness of which was such that only α-particles of range greater than 1.5 cm. in air could be detected. Gamma-rays had no influence upon the counter. The measured yield curve is given in the accompanying graph.
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References
Burcham, W. E., and Smith, C. L., Nature, 143, 795 (1939).
Freeman, J. M., Proc. Phys. Soc., A, 63, 668 (1950).
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MILEIKOWSKY, C., PAULI, R. Thin-Target Yield of O18(p,α)N15. Nature 166, 602 (1950). https://doi.org/10.1038/166602a0
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DOI: https://doi.org/10.1038/166602a0
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