Ein Interferometer für langsame Neutronen

After discussing the feasibility and possible usefulness of a neutron interferometer, we describe an arrangement whereby Fresnel interferences have been obtained for neutrons with wavelengths of about 4.4 Å in a 10 meter flight path with a 0.01 mm entrance slit, using two glass prisms instead of the Fresnel biprism. A useful separation of the two coherent beams of 0.06 mm has been reached. Possible improvements of the method are discussed.     

Ein richtungsempfindliches Zählrohr und seine Anwendung beim Li8→Be8*-Zerfall

A new type of proportional counter having a directional dependent efficiency has been used to measure the angular distribution of the α-particles of Be⁸ in the reaction Li⁸→Be^8*. From the experiment an upper limit of 10% for the amount of the Fermi contribution in the Li⁸ beta-decay is deduced.