Abstract
The monochromaticity of a “single line” neutron source is of utmost importance whenever secondary neutron yields over a wide energy range must be measured. Among the neutron sources considered, 3H(p,n) 3He is best if a suitable beam stop is used, for example, 28Si or 28Ni. Tatalum and gold given much larger backgrounds.. Neutron emission spectra from the hydrogen gases and from various beam stops have been measured between 10 and 14 MeV and the signal-to-noise ratios of the neutron production have been determined as a function of the gas pressure. In addition, the 0° break-up cross sections for p on T and d on D were obtained.
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