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03-4-1128-2017/2022
Priority:1
Status: Extended

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, Germany, Hungary, India, Japan, Kazakhstan, Macedonia, Moldova, Mongolia, 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 investigation 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
  • Development and testing of a new experimental method for measuring the ROT effect in fission on polarized neutron beams.

  • Measurement of rare fission modes with Timepix detectors.

  • Precision measurement of yields and angular correlations of gamma-rays and neutrons in the interaction of 14 MeV neutrons with nuclei.

  • Investigation of the variations of multiplicities of fission neutrons and TKE in the reaction 235U(nres,f) at the IREN facility. Investigation of the (n,gamma f) process in the reaction 239Pu(nres,f).

  • Investigation of fast neutron induced reactions (n,p), (n,) for light nuclei (Cl, N) using an ionization chamber and position-sensitive detectors Timepix3.
    Investigation of fundamental properties of the neutron, UCN physics:

  • Creating samples of nanodiamond powders with reduced content of metallic impurities and reduced content of elements with large neutron capture cross section to create low-energy nanoparticle reflectors.

  • Measurements of small-angle neutron scattering with the obtained samples to determine their characteristics (size of crystals, agglomerates, etc.).

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

  • Conducting detailed quantum calculations and preparing a draft experimental setup for a non-stationary quantum experiment on the interaction of neutrons with a neutron interference filter oscillating in space.

  • Conducting an experiment on the inelastic heating of UCNs on surface acoustic waves and checking the validity of the model of the effective potential in the case of a substance moving with extreme acceleration of the order of 10 7 g.
    Applied and methodological research:

  • Development of the data acquisition system for measurements of the time-of-flight spectra by the current method.

  • Modernization of the neutron guide of the 1st channel of the IBR-2 reactor.

  • Investigation of the depth profiles of all elements contained in the surface layers of solid-state samples.

  • Elemental and isotopic analysis of archaeological samples at the IREN facility using the method of neutron resonance spectrometry and the method of neutron activation analysis.

  • Modernization of the REGATA facility at the IBR-2 reactor.

  • Elemental analysis 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.

  • The use of low-background gamma spectrometry to analyze the content of radionuclides in environmental objects.

  • Development of an automated post for carrying out neutron activation analysis at the Institute of Nuclear Physics (Alma-Ata, Kazakhstan).

  • Development of a prototype facility for elemental analysis using TNM and high-resolution gamma-ray detectors.
    Development of the IREN facility

  • 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, B. Buadze, I.I. Chuprakov, G.V. Daniljan, S. Enkhbold, Fan Lyong Tuan, Yu.M. Gledenov, D.N. Grozdanov, N.A. Gundorin, A.P. Kobzev, M. Kulik, V.L. Kuznetsov, 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, M. Tsulaja, Vu Dyk Kong, Sh.S. Zeynalov, 24 engineers, 4 workers
2. Investigation of the 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, V.K. Ignatovich, 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, 2 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, Yu.V. Alekseenok, K.N. Vergel, V.M.B. Ged, D.C. Grozdov, I.I. Zinikovskaja, G.Y. Khristozova, G.S. Ahmedov, N.V. Simbirtseva, S.B. Borzakov, 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
  VBLHEPA.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. Gundorin, D.N. Grozdanov, C. Hramco, I.A. Oprea, K.D. Oprea, P.V. Sedyshev, V.R. Skoi, 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 Vienna IAEA
Innsbruck Univ.
Azerbaijan Baku BSU
IGG ANAS
IRP ANAS
Belarus Minsk INP BSU
ISEI BSU
SPMRC NASB
Bulgaria Sofia INRNE BAS
Plovdiv PU
UFT
CERN Geneva CERN
China Beijing IHEP CAS
Xi'an NINT
Croatia Zagreb Oikon IAE
RBI
Czech Republic Prague CEI
CTU
Ostrava UO
VSB-TUO
Egypt Cairo EAEA
Alexandria Univ.
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
Mainz JGU
Munich TUM
Tubingen Univ.
Hungary Budapest RKK OU
India Varanasi BHU
Italy Rome ENEA
Japan Kyoto KSU
Tsukuba KEK
Kazakhstan Nur-Sultan ENU
Almaty INP
Ust-Kamenogorsk TRCE
Moldova Chisinau IC ASM
IMB ASM
Mongolia Ulaanbaatar CGL
NRC NUM
Norway Trondheim NTNU
Poland Krakow NINP PAS
Gdansk GUT
Lodz UL
Lublin UMCS
Opole UO
Otwock (Swierk) NCBJ
Poznan AMU
Wroclaw UW
Republic of Korea Seoul Dawonsys
Daejeon KAERI
Pohang PAL
Romania Bucharest IFIN-HH
UB
Baia Mare TUCN-NUCBM
Cluj-Napoca INCDTIM
Constanta NIMRD
UOC
Galati UG
Iasi UAIC
Magurele ISS
Oradea UO
Pitesti ICN
Ramnicu Valcea I.C.S.I.
Sibiu ULBS
Targoviste UVT
Russia Moscow GIN RAS
GPI RAS
IKI RAS
IPCE RAS
ITEP
MSU
NRC KI
SINP MSU
VNIIA
Moscow, Troitsk INR RAS
Borok IBIW RAS
Dubna Diamant
Dubna State Univ.
Gatchina NRC KI PNPI
Grozny CSPU
Irkutsk LI SB RAS
Ivanovo ISUCT
Izhevsk UdSU
Nizhny Novgorod IPM RAS
Obninsk IPPE
Tomsk NPI TPU
St. Petersburg Botanic Garden BIN RAS
FIP
Hermitage
Ioffe Institute
KRI
SPSFTU
Sevastopol IBSS
Tula TSU
Vladikavkaz NOSU
Voronezh VSU
Yekaterinburg UrFU
Serbia Belgrade IPB
Univ.
Novi Sad UNS
North Macedonia Skopje UKiM
Slovakia Bratislava CU
IEE SAS
ILE SAS
IP SAS
Slovenia Ljubljana GeoSS
South Africa Pretoria UNISA
Bellville UWC
Stellenbosch SU
Switzerland Villigen PSI
Thailand Hat Yai PSU
Turkey Canakkale COMU
Ukraine Berdyansk BSPU
  Kiev KINR NASU
NUK
Kharkov ISMA NASU
NSC KIPT
Sumy IAP NASU
Donetsk DonIPE
Uzhgorod IEP NASU
USA Durham, NC Duke
Los Alamos, NM LANL
Oak Ridge, TN ORNL
Uzbekistan Tashkent INP AS RUz
Vietnam Hanoi IOP VAST
VNU

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