03-4-1128-2017/2022
 
Priority: 1
   
Status: In-progress


Investigations of Neutron Nuclear Interactions
and Properties of the Neutron
  
Leader:     E.V. Lychagin
Deputies:     Yu.N. Kopatch
P.V. Sedyshev

Participating countries and international organizations:
Albania, Australia, Austria, Azerbaijan, Belarus, Belgium, Bulgaria, CERN, China, Croatia, Czech Republic, Egypt, Finland, France, Georgia, Germany, Hungary, IAEA. India, Italy, Japan, Kazakhstan,  Moldova, Mongolia, North Macedonia, Norway, Poland, Republic of Korea, Romania, Russia, Serbia, Slovakia, Slovenia, South Africa, Switzerland, Thailand, Turkey, Ukraine, USA, Uzbekistan, Vietnam.

Issues addressed and main goals of research:
Experimental and theoretical investigations of symmetry breaking effects in reactions with neutrons and fundamental properties of the neutron to test the parameters of the Standard Model and search for "new physics". Investigation of the properties of excited nuclei, reactions with emission of charged particles, fission physics. Obtaining of relevant data for astrophysics, nuclear power engineering and nuclear waste transmutation problem using neutron- and gamma-induced reactions. Application of neutron physics methods in other fields of science and technology. Development and construction of detectors of neutrons and other ionizing radiation, as well as applied methods in nuclear physics with neutrons. Development of the Intense REsonance Neutron Source (IREN) and the experimental base at the IREN and IBR-2 facilities.

Expected results in the current year:
Investigations of violations of fundamental symmetries
in neutron-nucleus interactions and related data
  • Measurement of TRI and ROT effects for gamma-rays and neutrons in the fission of uranium by polarized neutrons.

  • Measurement of yields and angular correlations of light charged particles in ternary and quaternary fission of 252Cf using Timepix detectors.

  • Determination of characteristics of excitation levels of nuclei in the (n, 2n) and (n, n'γ) reactions with neutrons with an energy of 14 MeV.

  • Measurements of angular and energy distributions of prompt fission neutrons (PFN) in 235U(n,f) and 239Pu(n,f) reactions in the resonance region using a position-sensitive twin ionization chamber and 32 scintillation counters.

  • Determination of model concepts of modern values of the level density and radiation widths of nuclei of various shapes and types in the capture of slow neutrons.

  • Carrying out an experiment to search for a singlet deuteron.

  • Measurement of fast neutron cross sections for 6Li(n,α)3H and 91Zr(n,α)88Sr reactions.
Investigation of fundamental properties of the neutron, UCN physics:

  • Design and development of the necessary experimental equipment for realization of an experiment to measure the efficiency of extracting very cold neutrons from a source by a specially designed reflector.

  • Construction of a physical and mathematical model of propagation of slow neutrons in nanostructured diamond reflectors based on data of single small-angle scattering of cold neutrons.

  • Measurements of quasi-mirror reflection of VCN from a sample with crystallites of ~ 20 nm in size.

  • Design and construction of a new experimental setup for studying the recently observed phenomenon of nonstationary heating of UCNs on surface acoustic waves.
  • Development of the concept of a UCN source based on the idea of accumulating a pulsed neutron flux formed by a time lens. 
Applied and methodological research:

  • Measurement of neutron fluxes and spectra by the counting and current method at beamline 1 of the IBR-2 reactor to simulate the possibility of measuring the neutron lifetime.

  • Development of a prototype setup for neutron polarization by transmission through a 3He target.

  • Carrying out vacuum and cryogenic tests of a cryostat with a superconducting magnet to create an all-wave neutron polarizer.

  • Development and testing of an elemental analysis technique using the tagged neutron method and high-resolution gamma-ray detectors.

  • Investigation with the use of the EG-5 accelerator of the optical and electronic properties of semiconductor materials under X-ray irradiation.

  • Development of a modernization project for the EG-5 accelerator and its infrastructure.

  • Neutron activation and resonance neutron analysis of archaeological, biological and environmental samples at the IREN facility and at beamlines 3 and 11b of the IBR-2 reactor.

  • Creation of a network database of neutron activation analysis to automate studies of the elemental composition of samples of various nature at INP (Alma-Ata, Kazakhstan) and organization of routine neutron activation analysis at the automated site created in 2017-2019 at INP.

  • Completion of modernization of REGATA facility at the IBR-2 reactor .

  • Determination of the elemental content of plant, biological, geological samples, as well as new materials, including nanomaterials, by means of the neutron activation analysis method at the IBR-2 reactor using the REGATA facility.
  • Determination of radiation hardness of clean materials.

  • The use of low-background gamma spectrometry  and alpha spectrometry to analyze the content of radionuclides in environmental objects.
Development of the IREN facility

  1. Providing the neutron beam time from IREN for physical experiments.

List of projects:
  Project Leader Priority
(period of realisation)
1. TANGRA Yu.N. Kopatch 1   (2014-2022)

List of Activities
  Activity or Experiment Leaders
Status
      Laboratory or other
    Division of JINR
    Responsible person
Main researchers
1. Investigations of violations
of fundamental symmetries in
neutron-nucleus interactions
and related data
Yu.N. Kopatch
Upgrade
Data taking
Data analysis
  FLNP G.S. Ahmedov, D. Berikov, S.B. Borzakov, I.I. Chuprakov, G.V. Daniljan, S. Enkhbold, Fan Lyong Tuan, N.A. Fedorov, Yu.M. Gledenov, D.N. Grozdanov, N.A. Gundorin, A.P. Kobzev, M. Kulik, V.L. Kuznetsov, E.V.Kuznetsova, Zh.V. Mezentseva, S.V. Mironov, V.V. Novitsky, I.A. Oprea, K.D. Oprea, Yu.N. Pokotilovskij, A.B. Popov, P.V. Sedyshev, M.V. Sedysheva, O.V. Sidorova, N.V. Simbirtseva, V.R. Skoj, A.M. Suhovoj, S.A. Telezhnikov, T.Yu. Tretyakova, Vu Dyk Kong, Sh.S. Zeynalov, 24 engineers, 4 workers
2. Investigation of fundamental
properties of the neutron, UCN
physics
E.V. Lychagin
Upgrade
Data taking
Data analysis
  FLNP G.G. Bunatyan, T.L. Enik, A.I. Frank, W.I. Furman, S.V. Gorunov, G.V. Kulin, L.V. Mitsyna, A.Yu. Muzychka, A. Nesipbai, A.Yu. Nezvanov, Yu.N. Pokotilovskij, N.Yu. Rebrova, A.V. Strelkov, E.I. Sharapov, M.A. Zakharov, K.N. Zhernenkov, 3 engineers, 1 worker
3. Applied research P.V. Sedyshev
Upgrade
Data taking
Data analysis
  FLNP M.V. Frontasyeva, A.P. Kobzev, Yu.N. Kopatch, W.I. Furman, V.N. Shvetsov, K.N. Vergel,  D.S. Grozdov, I.I. Zinicovscaia, G.Y. Hristozova, N.S. Yushin, P.S. Nekhoroshkov, G.S. Ahmedov, N.V. Simbirtseva, S.B. Borzakov, N.A. Fedorov, D.N. Grozdanov, N.A. Gundorin, M. Kulik, Zh.V. Mezentseva, I.A. Oprea, K.D. Oprea, V.R. Skoj, A.Yu. Dmitriev, 22 engineers, 4 workers
4. Development of the IREN facility V.N. Shvetsov
Upgrade
  FLNP V.G. Pjataev, E.A. Golubkov, 17 engineers, 1 worker
  VBLHEP A.P. Sumbaev V.F. Minashkin, V.N. Zamrij, 3 engineers
  DLNP I.N. Meshkov
5. Development of experimental
infrastructure of the IREN facility
V.N. Shvetsov
Upgrade
  FLNP A.A. Beliakov, E.V. Lychagin, V.G. Pyataev, P.V. Sedyshev, V.A. Trepalin, 15 engineers
6. Modernization of EG-5 accelerator A.S. Doroshkevich
Upgrade
  FLNP A.N. Likhachev, A.P. Kobzev, 4 engineers
7. Project TANGRA Yu.N. Kopatch
Upgrade
Data taking
Data analysis
  FLNP F.Aliev, N.A. Fedorov, N.A. Gundorin, D.N. Grozdanov, C. Hramco, I.A. Oprea, K.D. Oprea, P.V. Sedyshev, V.R. Skoj, V.N. Shvetsov, T.Yu. Tretyakova
  VBLHEP U.Yu. Aleksakhin, S.V. Khabarov, Yu.N. Rogov, R.A. Salmin, M.G. Sapozhnikov, V.M. Slepnev, N.I. Zamjatin, E.V. Zubarev
  DLNP A.V. Krasnoperov, A.B. Sadovskii, A.V. Salamatin
  LRB G.N. Timoshenko
 
Collaboration
 

Country or International Organization

City Institute or laboratory
Albania Tirana UT
Australia Melbourne Univ.
Austria Innsbruck Univ.
Azerbaijan Baku BSU
    IGG ANAS
    IRP ANAS
Belarus Minsk INP BSU
    SPMRC NASB
Bulgaria Plovdiv PU
    UFT
  Sofia IE BAS
    INRNE BAS
CERN Geneva CERN
China Beijing IHEP CAS
  Xi'an NINT
Croatia Zagreb Oikon IAE
    RBI
Czech Republic Ostrava UO
    VSB-TUO
  Prague CEI
    CTU
Egypt Alexandria Univ.
  Cairo NRC
  Giza CU
  Mansoura MU
  Shibin El Kom MU
Finland Jyvaskyla UJ
  Oulu UO
France Cadarache CC CEA
  Grenoble ILL
    LPSC
  Saclay LLB
  Strasbourg IPHC
Georgia Tbilisi AIP TSU
    TSU
Germany Darmstadt GSI
  Dresden HZDR
  Kleve HSRW
  Mainz JGU
  Munich TUM
  Tubingen Univ.
Hungary Budapest RKK OU
IAEA Vienna IAEA
India Varanasi BHU
Italy Rome ENEA
Japan Kyoto KSU
  Tsukuba KEK
Kazakhstan Almaty INP
  Kyzylorda KazSRIRG
  Nur-Sultan ENU
Moldova Chisinau IC ASM
    IMB ASM
Mongolia Ulaanbaatar CGL
    NRC NUM
North Macedonia Skopje UKiM
Norway Trondheim NTNU
Poland Gdansk GUT
  Krakow NINP PAS
  Lodz UL
  Lublin UMCS
  Opole UO
  Otwock (Swierk) NCBJ
  Poznan AMU
  Wroclaw UW
Republic of Korea Daejeon KAERI
  Pohang PAL
  Seoul Dawonsys
Romania Baia Mare TUCN-NUCBM
  Bucharest IFIN-HH
    UB
    UPB
  Cluj-Napoca INCDTIM
  Constanta UOC
  Galati UG
  Iasi NIRDTP
  Magurele ISS
    NIMP
  Oradea UO
  Pitesti ICN
  Ramnicu Valcea I.C.S.I.
  Sibiu ULBS
  Targoviste UVT
Russia Borok IBIW RAS
  Dubna Diamant
    Dubna State Univ.
  Gatchina NRC KI PNPI
  Grozny CSPU
  Irkutsk LI SB RAS
  Ivanovo ISUCT
  Izhevsk UdSU
  Moscow GIN RAS
    GPI RAS
    IKI RAS
    IPCE RAS
    ITEP
    MSU
    NRC KI
    SIAS
    SINP MSU
    VNIIA
  Moscow, Troitsk INR RAS
  Nizhny Novgorod IPM RAS
  Obninsk IPPE
  Sevastopol IBSS
  St. Petersburg Botanic garden BIN RAS
    FIP
    Ioffe Institute
    KRI
    SPMU
    SPSFTU
  Tula TSU
  Vladikavkaz NOSU
  Voronezh VSU
  Yekaterinburg UrFU
Serbia Belgrade IPB
    Univ.
  Novi Sad UNS
Slovakia Bratislava CU
    IEE SAS
    ILE SAS
    IP SAS
Slovenia Ljubljana GeoSS
South Africa Bellville UWC
  Pretoria UNISA
  Stellenbosch SU
Switzerland Villigen PSI
Thailand Hat Yai PSU
Turkey Canakkale COMU
Ukraine Berdyansk BSPU
  Donetsk DonIPE
  Kharkov ISMA NASU
    NSC KIPT
  Kiev KINR NASU
    NUK
  Uzhhorod IEP NASU
USA Durham, NC Duke
  Los Alamos, NM LANL
  Oak Ridge, TN ORNL
Uzbekistan Tashkent INP AS RUz
Vietnam Hanoi IOP VAST
    VNU