Experimental search for long-range forces in neutron scattering via a gravitational spectrometer
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In this work we introduce a method of measuring low-energy scattering cross section with a gravitational spectrometer. In this method we add atoms (i.e., He) to the gravitational spectrometer filled with a target gas of ultracold neutrons (UCN). We search for long-range forces between atoms and UCN by measuring transfer of a small recoil energy similar to 10(-7) eV using the gravitational spectrometer. As a result of this search we set new constraints on the strength of long-range forces within the range of the effective radius of interaction of 10(-7)-10(-4) cm.
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Anatoli P. Serebrov, Peter Geltenbort, O. M. Zherebtsov, S. V. Sbitnev, V. E. Varlamov, A. V. Vassiljev, M. S. Lasakov, I. A. Krasnoschekova, S. N. Ivanov, Dimitry A. Pushin (2014). Experimental search for long-range forces in neutron scattering via a gravitational spectrometer. UWSpace. http://hdl.handle.net/10012/13799