Production of Ultra-Cold-Neutrons in Solid α-Oxygen

Details Production of Ultra-Cold-Neutrons in Solid α-Oxygen Production of Ultra-Cold-Neutrons in Solid α-Oxygen

2009-11-23

arxiv.org/abs/0911.4398v2

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 5 figuers

Scientific paper

Our recent neutron scattering measurements of phonons and magnons in solid \alpha-oxygen have led us to a new understanding of the production mechanismen of ultra-cold-neutrons (UCN) in this super-thermal converter. The UCN production in solid \alpha-oxygen is dominated by the excitation of phonons. The contribution of magnons to UCN production becomes only slightly important above E >10 meV and at E >4 meV. Solid \alpha-oxygen is in comparison to solid deuterium less effcient in the down-scattering of thermal or cold neutrons into the UCN energy regime.

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