Two related physical phenomena have recently been observed: quantum states of ultracold
neutrons (UCN) in the gravitational field above a flat mirror, and quantum states of cold …

We study the possibility of efficiently reflecting very cold neutrons (VCN) from powders of
nanoparticles. In particular, we measured the scattering of VCN on powders of diamond …

De nouveaux développements méthodologiques relatifs au spectromètre GRANIT
concernent lʼamélioration des paramètres critiques de cette installation expérimentale …

Usually Ultra Cold Neutrons (UCN) and Very Cold Neutrons (VCN) are not efficiently
scattered by individual atoms in matter due to their large wavelength. On the contrary, such …

The structure of ice samples formed in the decay of a water impurity gel at temperatures
above 4 K and atmospheric pressure has been examined. The X-ray diffraction analysis …

Results of neutron (SANS study) and x-ray diffraction experiments with nanocluster samples
of deuteroethanol (C 2 D 5 OD) or ordinary pure ethanol (C 2 H 5 OH) are presented. A …

We present the results of quasielastic small-angle neutron scattering study of deuterium
clusters immersed in superfluid 4 He. Diffraction intensities exhibit a very strong change in a …

Results of recent SANS experiments with impurity‐helium gel (IHG) samples in He‐II are
presented. We estimate the mean size of the impurity nanoparticles that form the frame of the …

The first results of the study of the structure of an impurity oxygen gel in superfluid He-II and
in normal liquid helium have been obtained by the small-angle neutron scattering (SANS) …

Rapid cooling of a helium impurity gas mixture to the superfluid helium temperatures allows
us to prepare an impurity-helium condensate with jelly-like structure (impurity gel) in …