Abstract
Abstract The paper contains recent contributions to cold and ultracold neutron physics by groups at Garching and Grenoble, and, in a second part, by a group at the University of Rhode Island. We describe first results in neutron microscopy obtained at the ILL and Garching reactors. Two versions of a two-mirror neutron microscope were used: one employing ultracold neutrons and total-reflecting mirrors, and the other utilizing very cold neutrons in conjunction with multilayer mirrors. We then describe the essential features of the new source of ultracold and cold neutrons which is presently being set up at the HFR, Grenoble, and discuss the novel all-metallic neutron mirrors and guides which were developed in connection with this project. Finally a proposal by the University of Rhode Island for application of high-resolution neutron-optical techniques to the study of critical phenomena in liquids is presented.
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