The device consisting of neutronguide and different type -detectors is installed at the horizontal channel 8 of the WWR-M reactor. The logarithmic neutronguide is placed inside the reactor biological shielding. It forms a thin (of width about 1 mm) neutron beam with the intensity of
The nuclear structure studies were performed by the measurements of
-spectra and coincidences in the
The applied investigations are based on the measurements of -spectra from neutron capture by the isotopes of each element. The -spectra corresponding to individual isotope are different, hence, the quantitative determinantion of both elemental and isotopic content of the sample is possible. The in-beam measurements do not change the composition and the structure of samples. As an example the investigation of antimony behavior in the process of the preparation of HTSC-ceramics and measurement of boron contents in river sediments and geochemical standards from China and the USA can be mentioned.