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Investigations in the Field of Nuclear Physics with Neutrons

Development of the IREN source:

• Providing the neuron beam from IREN for physical experiments. Modernization of the equipment. Construction of a complex of fast electronics.
  
  
• Preparation of beam lines N 1, 2, 4 for experiments at IREN. Determination of IREN beam parameters.
  
  Fundamental investigations of nuclear reactions with neutrons:
  
• Measurements of energy dependence of the radiative neutron capture cross section for the ²⁰⁷Pb isotope in energy region from thermal to 10 eV. Search for negative p-resonances in lead isotopes and their connection with the parity violation effects.
  
  
• Construction of the alpha spectrometer for experiments at IREN. Investigation of interference effects in reactions ³⁵Cl(n, p) ³⁵S and ¹⁴N(n, p) ¹⁴C in the resonance neutron energy region. Studies of neutron-nucleus interaction mechanism in (n,p) and (n,) reactions with fast neutrons.
  
  
• Construction of a multisectional gamma-ray and neutron detector for measurements of neutron capture, transmission, fission cross sections, alpha coefficient for reactor and constructive materials. Measurements of neutron cross sections at IREN.
  
  
• Construction of a detector system for measurements of yields and angular correlations of fission fragments and neutrons in fission. Measurement of neutron multiplicity in fission.
  
  
• Measurement of the P-odd asymmetry in total cross section with cold neutrons on lead.
  
  
• Investigation of rare fission modes. Test experiment for measuring quaternary fission in ²⁵²Cf using MEDIPIX silicon pixel detectors.
  
  
• Determination of the gamma-ray strength functions and level densities in neutron resonances in the neutron binding energy region for Nb-93, U-235 and other nuclei.
  
  
• Investigation of neutron emission from a massive (315 kg) model target from natural uranium with the incident deuteron beam of 2-6 GeV.
  
  Investigation of the fundamental properties of the neutron, UCN physics:
  
• Determining the source of background at the nn-scattering measurement facility and searching for the ways to suppress this background. Experimental verification of the viability of various suppression methods.
  
  
• Testing of measurement technigue of n,e- scattering length at IREN.
  
  
• Experimental verification of equivalence principle for the neutron. Direct measurement of neutron gravitational acceleration.
  
  
• First experiments at the GRANIT spectrometer at ILL (France).
  
  
• Construction of a set-up for testing the possibility of cold neutron storage at the exit of a neutron beam line.
  
  Applied research:
  
• Development of a non-destructive element analysis method using neutron spectroscopy.
  
  
• Construction of sample irradiation channels with pneumatic transport at the IREN facility.
  
  
• Measuring yields of the medical isotopes Мо-100 and Sn-117m at the bremsstrahlung electron beam at IREN.
  
  
• Elementary analysis of nanostructures using few MeV charged particle beams.
  
  
• Mathematical and physical modeling and calibration of neutron detectors for space vehicles.
  
  
• Biomonitoring of atmospheric deposition of trace elements in some selected areas of Russia, countries of Eastern and Central Europe (Poland, Belarus, Slovakia, Norway), in the Balkans (Albania, Bulgaria, Greece, Macedonia, Serbia, Croatia and Montenegro) and in Asia (Vietnam, India, Mongolia and Thailand). Continuation of investigations using NAA in ecology, medicine, biotechnology of nanoparticles of gold and silver and development of new materials (synthesis of fine-crystalline diamonds and boron nitride).
  
  

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