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Ultracold neutron detector for neutron lifetime measurements

Author:
V. Andreeva   A. Vassiljeva   E. Ivanova   D. Ilyina   b   digatchi@list.ru   A. Krivshicha   A. Serebrova  


Journal:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment


Issue Date:
2017


Abstract(summary):

The gas-filled detector of ultracold neutrons has been designed and constructed for the spectrometer of the neutron lifetime measurements at the ILL, Grenoble, France. The detector has been successfully tested and is currently being used at this spectrometer. We could show that minimization of the “wall” effect is a key factor to ensure efficient background suppression and to maximize the detection efficiency. This effect is primarily related to the composition of the gas mixture, which crucially depends on the neutron velocity spectrum.


Page:
548-551


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