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Investigations of Neutron Nuclear Interactions
and Properties of the Neutron

Investigations of violations of fundamental symmetries in neutron-nucleus interactions and related data

• Determination of parameters of the ROT-effect in the fission of ²³⁵U by neutrons with an energy of 0.3 eV.
  
  
• Treatment of the results from the measurements of P-odd effect in the reaction of ¹⁰B(n,) ⁷Li performed in 2016 at ILL, Grenoble.
  
  
• Development of the design of an instrument for measuring the P-odd effect in the reaction of ³He(n,p) ³H.
  
  
• Investigation of neutron paramagnetic resonance of the first kind in samples of titanium hydride TiH₂ in the polarized neutron energy range of 0.062-2.3 eV using the KOLKHIDA facility at the IBR-2 reactor.
  
  
• Investigation of prompt fission neutrons and superfluidity properties of fission fragments (IREN). Investigation of the dynamics of interaction of Fermi- and Bose-states of nuclear matter on the basis of experimental data on the intensities of two-quantum cascades of radiative neutron capture in various excited nuclei including actinides and fission products. The corresponding analysis of data from the experiment with a ⁹³Nb target performed in Budapest by employees of the University of Novi Sad, Belgrade.
  
  
• Measurement and analysis of angular correlations in the emission of neutrons and light charged particles in the spontaneous fission of ²⁵²Cf.
  
  
• Measurement of angular correlations in the emission of neutrons and gamma-rays in inelastic neutron scattering for various elements in the framework of the TANGRA project.
  
  
• Development of an alpha spectrometer on beamline N 1 of IREN; test measurements of the ⁶Li(n,) ³H reaction.
  
  
• Measurements of the (n,) reaction with Ni-58,60,61 isotopes for neutron energies E_n =4.5-6.5 MeV at the accelerators EG-5 in FLNP JINR and EG-4.5 of the Institute of Heavy Ion Physics of Peking University.
  
  
• Treatment of experimental data from the measurements of the ²⁵Mg(n,) ²²Ne and ⁹¹Zr(n,) ⁸⁸Sr reactions induced by fast neutrons.
  
  Investigation of fundamental properties of the neutron, UCN physics:
  
• Experimental determination of characteristics of resonance transitions between quantum states of neutrons in the gravitational field of the Earth using the GRANIT spectrometer.
  
  
• Determination of the possibility of practical application of diamond nanopowder reflectors for targeted extraction of very cold neutrons.
  
  
• Development of the design of a setup to measure the energy dependence of the UCN loss factor in the energy range close to limiting values.
  
  
• Design and manufacture of a new time-of-flight Fourier diffractometer for neutron free fall experiments.
  
  
• Preparation of the experiment for observation of neutron quantum tunneling through an oscillating potential structure: quantum calculations, development and testing of the experimental setup.
  
  
• Nonstationary quantum experiments with slow neutrons: neutron diffraction by surface ultrasonic waves and reflection from an oscillating mirror.
  
  Applied and methodological research:
  
• Development of gas-filled position-sensitive detectors of charged particles to conduct investigations of nuclear fission, in neutron radiography and in condensed matter physics.
  
  
• Inspection of the technical condition of the charged particle accelerator EG-5 in the framework of preparation to the development of a microbeam.
  
  
• Investigation of depth profiles of elements in the near-surface layers of solids using nuclear-physics methods (Elastic Recoil Detection Analysis and Rutherford Backscattering Spectrometry).
  
  
• Elemental and isotopic analysis of samples at the IREN facility using neutron spectroscopy, neutron and gamma activation analyses.
  
  
• Development of the elemental analysis of geological specimens and ores using the tagged neutron method as well as standard neutron sources.
  
  
• Carrying out of neutron activation analysis of environmental, geological, biological samples and novel materials at the IBR-2 reactor using the REGATA facility in the framework of the projects supported by grants and programs of Member States and Associated Members of JINR, RFBR and IAEA.
  
  
• Upgrade of hot cells of the REGATA facility to work with highly active samples.
  
  
• Improvement of the database for carrying out NAA using three automatic sample changers to measure the induced radioactivity generated by irradiation in the IBR-2 beamlines.
  
  
• Construction of a spectrometric system to measure natural and man-made radioactivity for radioecological and materials science research.
  
  Development of the IREN facility
  
• Operation of the accelerator comprising two accelerating sections with a beam at a frequency of 50 Hz. Providing the neutron beam time of 1000 hours from IREN for physical experiments.
  
  
• Modernization of experimental beamline N1 of the IREN facility.
  
  

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