Precision studies of the neutron whispering gallery with a MgF2 concave mirror
The neutron whispering gallery effect was discovered in experiments with cold neutrons at D17. An important motivation for precision studies of this effect consists of its extreme sensitivity to extra fundamental short-range forces. Even the very first experiments appeared to be quite competitive from this point of view. Already in these experiments, the interference pattern corresponded to many resolved quantum states. The neutron flux was measured as a function of the longitudinal neutron velocity (measured using the time-of-flight method) and the tangential neutron velocity (calculated using the angle of deflection of neutrons measured in a position-sensitive detector). Our present interest is based on a possibility to obtain by far the best constraint for the extra short-range forces in the particularly interesting range of characteristic distatnces of one - a few nanometers. Our ultimate goal, with the MgF2 concave mirror, to measure about 100th order of such interference with about 10% accuracy for a line shape.
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NESVIZHEVSKY Valery and CUBITT Robert. (2016). Precision studies of the neutron whispering gallery with a MgF2 concave mirror. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.3-15-85
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