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Range of Protons from N14(n,p)C14

I. C. Cornog, W. Franzen, and W. E. Stephens

  • Randal Morgan Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania

Phys. Rev. 74, 1 – Published 1 July, 1948

DOI: https://doi.org/10.1103/PhysRev.74.1

Abstract

The mean range of protons emitted in the slow neutron disintegration of nitrogen has been measured in a cloud chamber to be 1.00 cm of air, in good agreement with other observers. It is suggested that this range and the energy (561 kev) of the emitted protons as deduced from the nH mass difference and the extrapolated end point of the C14 beta-ray spectrum be used to establish a reliable point on the proton range-energy curve. This point lies on Bethe's original 1937 range-energy curve, but disagrees with Bethe's curve revised to fit the ionization chamber range of artificially accelerated protons.

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