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

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

2010-09-23

arxiv.org/abs/1009.4707v1

Appl.Phys.Lett.97:234105,2010

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1063/1.3521285

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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