Nature 357, 390 - 391 (04 June 1992); doi:10.1038/357390a0

A neutron lens

M. A. Kumakhov & V. A. Sharov

Institute for Roentgen Optical Systems, World-Lab, I.V. Kurchatov Atomic Energy Institute, Moscow 123182, Russia

SMOOTH hollow glass capillaries can be used to guide neutrons by multiple reflection at grazing angles along the inner walls. Here we show that a concentric arrangement of bent capillaries makes it possible to focus and increase the flux density of a neutron beam—a phenomenon that will have applications in areas such as prompt-gamma activation analysis and neutron depth profiling.

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