title: Bonse-Hart angular profiles realized for multiply Bragg reflected neutrons.
abstract: We have produced a monochromatic neutron beam with the sharpest angular profile to date. Multiple Bragg reflections from optimally designed channel-cut silicon single crystals have produced neutron beams with theoretical Darwin angular profiles. This experiment constitutes the first realization of the proposal made by Bonse and Hart 35 years ago and opens up avenues for ultrasmall angle neutron scattering studies down to wave vector transfers of 10(-5) A(-1).
authors.affiliation: Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: A G
authors.initials: AG
authors.lastname: Wagh
authors.forename: V C
authors.initials: VC
authors.lastname: Rakhecha
authors.forename: W
authors.initials: W
authors.lastname: Treimer