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03-5-1130-2017/2021
Priority:1
Status: In-progress

Synthesis and Properties of Superheavy Elements,
Structure of Nuclei at the Limits of Nucleon Stability


Leader:     M.G. Itkis
Scientific leader:                Yu.Ts. Oganessian


Participating countries and international organizations:
Belgium, Bulgaria, CERN, China, Czech Republic, Egypt, Finland, France, Germany, India, Italy, Japan, Kazakhstan, Mongolia, Poland, Romania, Russia, Slovakia, South Africa, Spain, Sweden, Switzerland, Ukraine, United Kingdom, USA, Vietnam.

Issues addressed and main goals of research:
Synthesis and investigation of the properties of nuclei at stability limits. Investigation of the mechanisms of heavy-ion-induced reactions. Study of the physical and chemical properties of heavy and superheavy elements.

Expected major results in the current year:
  • Experiments for studying complete fusion reactions with 50Ti.

  • Preparing for and conducting first test experiments on the synthesis of isotopes of element 115 (Mc) in the 48Ca + 243Am reaction at the SHE Factory.

  • Experiments on the measurement of the multiplicity of prompt neutrons from the spontaneous fission of Sg isotopes in the reactions with 54Cr and heavy isotopes of Rf in the reactions with 22Ne.
    Searching for rare reaction channels with the evaporation of charged particles, studying the decay properties of heavy Rf and Sg isotopes using the separator SHELS + GABRIELA.
    Preparation for experiments on the spectroscopy studies of the decay properties of the 288Mc nuclide and its daughter products.

  • Experiments on the study of the chemical properties of element 113 in the 48Ca + 243Am reaction. Preparation for experiments aimed to study the chemistry of SHE at the SHE Factory.

  • Measurements of the cross-sections of xn channels for the complete fusion reactions 40Ar+ 144Sm, 40Ar+ 164Er, 40Ca+ 144Nd, and 48Ca+ 142Nd.

  • Investigation of the mass-energy distributions of fragments produced in the reactions 18O+ 232Th, 238U, 22Ne+ 232Th, 238U, and 48Ca+ 154Sm.
    Study of multi-body decays of low-excited heavy nuclei.
    Study of multicluster decay of heavy and superheavy nuclei.
    Development of physics set-ups.

  • Investigation of the structure of the exotic nuclei 7, 17Ne, and 26Si using radioactive beams at the ACCULINNA-1 and ACCULINNA-2 set-ups.

  • Experiments with the 16 and 22Ne heavy-ion beams. Measurement of yields of multi-nucleon transfer reaction products. Measurement of total reaction cross-sections and those of individual channels using high-efficiency methods for registration and identification of products with low-intensity beams of exotic nuclei (10 3-10 5 s -1).

  • Theoretical studies of the mechanisms of heavy-ion-induced reactions.

  • Development and update of the network knowledge base on nuclear physics.

  • Investigation of shapes and sizes of exotic nuclei employing laser spectroscopy methods.

List of Activities
  Activity or Experiment Leaders
Status
  Laboratory or other
Division of JINR
Responsible person
Main researchers
1. Synthesis of new isotopes
of superheavy elements at DGFRS
V.K. Utyonkov
Data taking
  FLNR F.Sh. Abdullin, N.D. Kovrijnykh, D.A. Kuznetsov, A.N. Polyakov, O.V. Petrushkin, R.N. Sagaidak, V.G. Subbotin, A.M. Sukhov, I.V. Shirokovsky, M.V. Shumeiko, A.S. Sviridchenkov, D.I. Solov'ev, L. Schlattauer, Yu.S. Tsyganov, A.A. Voinov, A.M. Zubareva
2. -, - and gamma- spectroscopy
of heavy nuclei at the SHELS
separator
A.V. Yeremin
Data taking
  FLNR V.I. Chepigin, M.L. Chelnokov, A.V. Isaev, I.N. Izosimov, D.E. Katrasev, A.N. Kuznetsov, A.A. Kuznetsova, O.N. Malyshev, Yu.A. Popov, V.M. Popov, A.G. Popeko, E.A. Sokol, A.I. Svirikhin, V.A. Sbitnev, M.S. Tezekbaeva
3. Chemical properties of superheavy
elements
S.N. Dmitriev
Data taking
  FLNR N.V. Aksenov, Yu.V. Albin, A.Yu. Bodrov, G.A. Bozhikov, N.S. Gustova, V.Ya. Lebedev, K.V. Lebedev, A.Sh. Madumarov, E.V. Melnik, A.V. Rykhlyuk, A.V. Sabelnikov, G.Ya. Starodub, G.K. Vostokin, M.G. Voronyuk, I. Zvara
4. Experiments at the magnetic
analyzer of superheavy atoms
MASHA
A.M. Rodin
Data taking
  FLNR E.V. Chernusheva, A.V. Guljaev, A.V. Guljaeva, D. Kamas, A.B. Komarov, L. Krupa, A.S. Novoselov, A.Opihal, A.V. Podshibyakin, V.S. Salamatin, S.V. Stepantsov, V.Yu. Vedeneev, S.A. Yukhimchuk
5. Study of the processes
of fusion-fission, quasi-fission and
multi-nucleon transfer reactions.
CORSET-DEMON, CORSAR, and
MiniFOBOS set-ups
M.G. Itkis
Data taking
  FLNR A.A. Alexandrov, I.A. Alexandrova, I.N. Dyatlov, O.V. Falomkina, Z.I. Gorya'nova, Yu.M. Itkis, D.V. Kamanin, V.V. Kirokasian, E.M. Kozulin, N.I. Kozulina, G.N. Knyazheva, E.A. Kuznetsova, K.V. Novikov, A. Pan, I,V, Pchelintsev, Yu.V. Pyatkov, E.O. Savelieva, Yu.B. Semenov, A.N. Solodov, A.O. Strekalovsky, O.V. Strekalovskiy, I.V. Vorob'ev, A.O. Zhukova, V.E. Zhuchko
  LIT P.V. Goncharov, G.A. Ososkov, A.V. Uzhinsky, V.B. Zlokazov
6. Study of the structure of exotic
nuclei near and beyond the
drip-lines at the ACCULINNA-1,
ACCULINNA-2 and COMBAS
fragment separators
A.S. Fomichev
Data taking
  FLNR A.G. Artukh, E. Batchuluun, S.G. Belogurov, A.A. Bezbakh, N. Carjan, V. Chudoba, M.S. Golovkov, L.V. Grigorenko, A.V. Gorshkov, E.M. Gazeeva, V.A. Gorshkov, G. Kaminski, S.A. Krupko, S.A. Klygin, G.A. Kononenko, D.A. Kislukha, K.A. May, B. Mauyey, I.A. Muzalevskiy, E.Yu. Nikolskii, Yu.L. Parfenova, S.A. Rimzhanova, Yu.M. Sereda, S.I. Sidorchuk, R.S. Slepnev, P.G. Sharov, A. Serikov, G.M. Ter-Akopian, R. Wolski, A.N. Vorontsov, B. Zalewski
  BLTP S.N. Ershov, N.B. Shulgina
7. Investigation of reactions induced
by stable and radioactive ion beams
leading to the formation of exotic
nuclei. Development of MAVR and
MULTI set-ups
Yu.E. Penionzhkevich
Data taking
  FLNR D.T. Aznabaev, M.P. Ivanov, S.M. Lukyanov, V.A. Maslov, K.O. Mendibaev, Z.D. Pokrovskaya, R.V. Revenko, N.K. Skobelev, Yu.G. Sobolev, I. Sivacek, V.I. Smirnov, D.A. Testov
8. Theoretical studies of nuclear
reaction mechanisms
A.V. Karpov
 
  FLNR E.A. Cherepanov, A.S. Denikin, Yu.A. Muzichka, M.A. Naumenko, V.A. Rachkov, V.V. Samarin, V.V. Saiko
9. Development and update of the
network knowledge base on nuclear
physics
A.V. Karpov
A.S. Denikin
Data taking
  FLNR M.A. Naumenko, V.A. Rachkov, V.V. Samarin, V.V. Saiko
  LIT E.I. Alexandov, V.V. Korenkov, P.V. Zrelov
10. Laser spectroscopy of isotopes S.G. Zemlyanoy
Data taking
  FLNR K.A. Avvakumov, G.N. Myshinskiy, V.I. Zhemenik, B. Zuzaan

Collaboration
Country or International
Organization
City Institute or Laboratory
Belgium Brussels ULB
Leuven KU Leuven
Bulgaria Sofia INRNE BAS
CERN Geneva CERN
China Lanzhou IMP CAS
Beijing PKU
Czech Republic Prague CTU
VP
Olomouc UP
Rez NPI CAS
Egypt Giza CU
Al-Minufya MU
Finland Jyvaskyla UJ
France Caen GANIL
Orsay CSNSM
IPN Orsay
Saclay SPhN CEA DAPNIA
Strasbourg CRN
IPHC
Germany Berlin HZB
Darmstadt GSI
Mainz JGU
Tubingen Univ.
India New Delhi IUAC
Kolkata VECC
Manipal MU
Italy Catania INFN LNS
Legnaro INFN LNL
Messina UniMe
Naples Unina
Japan Wako RIKEN
Tokai JAEA
Kazakhstan Almaty INP
IETP KazNU
Astana ENU
Mongolia Ulaanbaatar NRC NUM
Poland Warsaw UW
IEP WU
Krakow NINP PAS
Poznan AMU
Romania Bucharest IFIN-HH
Russia Moscow IPCE RAS
MSU
MUCTR
NNRU "MEPhI"
NRC KI
SINP MSU
Moscow, Troitsk INR RAS
Moscow, Zelenograd RIMST
Dimitrovgrad SSC RIAR
Gatchina NRC KI PNPI
Sarov VNIIEF
St. Petersburg Ioffe Institute
KRI
Voronezh VSU
Slovakia Bratislava CU
IP SAS
South Africa Cape Town iThemba LABS
Pretoria UNISA
Stellenbosch SU
Spain Madrid CSIC
Huelva UHU
Switzerland Villigen PSI
Sweden Goteborg Chalmers
Lund LU
Ukraine Kiev KINR NASU
United Kingdom Manchester UoM
USA Argonne, IL ANL
College Station, TX Texas A&M
East Lansing, MI MSU
Livermore, CA LLNL
Nashville, TN VU
Oak Ridge, TN ORNL
Vietnam Hanoi IOP VAST

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