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Neutron interference from a split-crystal interferometer

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arxiv 2202.08769 v1 pith:E7QA6QVL submitted 2022-02-17 physics.ins-det

Neutron interference from a split-crystal interferometer

Hartmut Lemmel (1) , Michael Jentschel (2) , Hartmut Abele (1) , Fabien Lafont (2) , Bruno Guerard (2) , Carlo P. Sasso (3) , Giovanni Mana (3) , Enrico Massa (3) ((1) Atominstitut
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TU Wien Vienna Austria (2) ILL Institut Laue-Langevin Grenoble France (3) INRIM Istituto Nazionale di Ricerca Metrologica Torino Italy)
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classification physics.ins-det
keywords neutroncrystalgrenobleinterferenceinterferometerinterferometersachievedalign
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We report the first successful operation of a neutron interferometer having a separate beam recombining crystal. We achieved this result at the neutron interferometry setup S18 at the ILL in Grenoble by a collaboration between TU Wien, ILL Grenoble and INRIM Torino. While previous interferometers were machined out of a single crystal block, we managed to align two crystals on nanoradian and picometer scales, as required to obtain neutron interference. As a decisive proof of principle demonstration, it opens the door to a new generation of neutron interferometers and exciting applications.

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