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arXiv · 1009.4707

Far-ultraviolet signatures of the 3He(n,tp) reaction in noble gas mixtures

Patrick P. Hughes·Michael A. Coplan·Alan K. Thompson·Robert E. Vest·Charles W. Clark
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Abstract

Previous work showed that the 3He(n,tp) reaction in a cell of 3He at atmospheric pressure generated tens of far-ultraviolet photons per reacted neutron. Here we report amplification of that signal by factors of 1000 and more when noble gases are added to the cell. Calibrated filter-detector measurements show that this large signal is due to noble-gas excimer emissions, and that the nuclear reaction energy is converted to far-ultraviolet radiation with efficiencies of up to 30%. The results have been placed on an absolute scale through calibrations at the NIST SURF III synchrotron. They suggest possibilities for high-efficiency neutron detectors as an alternative to existing proportional counters.

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Patrick P. Hughes, Michael A. Coplan, Alan K. Thompson, Robert E. Vest, Charles W. Clark. 2010-09-23. Far-ultraviolet signatures of the 3He(n,tp) reaction in noble gas mixtures. https://doi.org/10.1063/1.3521285

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