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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 results in the current year:
  • Experiments on the synthesis of Mc isotopes in the 48Ca + 243Am reaction at the SHE Factory.

  • Experiments on the synthesis of Fl isotopes in the 48Ca + 242Pu reaction aimed at studying the chemical properties of Fl using the DGFRS-2 separator.

  • Preparation for and the launch of experiments on the synthesis of elements 119 and 120 in the complete fusion reactions with 50Ti projectiles.

  • Experiments on the study of the decay properties (-, -, gamma-spectroscopy) of Sg isotopes and heavy isotopes of Rf formed in the reactions with 54Cr and 22Ne using the SHELS + GABRIELA separator. Experiments on measuring the multiplicity of prompt neutrons from the spontaneous fission of heavy Rf isotopes in the reactions with 22Ne. Test experiment on the spectroscopy of the decay properties of the 288Mc isotopes and its daughter products in the 48Ca + 243Am reaction.

  • Experiments on the study of the chemical properties of Db and Nh in the 48Ca + 243Am reaction. Preparation for chemistry experiments at the SHE Factory.

  • Analysis of experiments conducted with the MASHA set-up aimed at studying the operational stability of a new design of the hot catcher for the separation of short-lived mercury and radon isotopes synthesized in complete fusion reactions.

  • Investigation of the mass-energy and angular distributions of fragments produced in the 44Ca + 206Pb reaction. Study of the mechanism of multinucleon transfer in the 136Xe + 194Pt reaction. Study of multi-body decays of low-excited heavy nuclei. Study of the multicluster decay of heavy and superheavy nuclei. Development of physics set-ups.

  • Study of nuclei with Z<20 near the boders of nucleon stability. Investigation of the structure of the exotic nuclei 7He, 10Li, 26Si, and 25P using radioactive ion beams at the ACCULINNA-1 and ACCULINNA-2 set-ups.

  • Experiments conducted at the MAVR set-up for the study of fast charged particles in coincidence with recoil nuclei aimed at determining the reaction mechanism for experiments on the synthesis of new elements. Study of the yields of products in multinucleon transfer reactions. Measurement of total reaction cross sections using low-intensity beams of exotic nuclei.

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

  • Maintenance and update of the web 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.D. Shubin, V.G. Subbotin, I.V. Shirokovsky, M.V. Shumeiko, 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.A. Astakhov, A.Yu. Bodrov, G.A. Bozhikov, I. Chuprakov, N.S. Gustova, K.V. Lebedev, A.Sh. Madumarov, E.V. Melnik, A.V. Sabelnikov, G.Ya. Starodub, G.K. Vostokin, M.G. Voronyuk
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, T. Banerjee, 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, D. Kumar, C.H. Meghashree, 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, V. Chudoba, M.S. Golovkov, L.V. Grigorenko, A.V. Gorshkov, E.M. Gazeeva, V.A. Gorshkov, A. Ismailova, G. Kaminski, S.A. Krupko, S.A. Klygin, G.A. Kononenko, K.A. May, B. Mauyey, I.A. Muzalevskiy, E.Yu. Nikolskii, Yu.L. Parfenova, W. Piatek,, S.A. Rimzhanova, Yu.M. Sereda, S.I. Sidorchuk, R.S. Slepnev, P.G. Sharov, S.V. Stepantsov, A. Swiercz, P. Szymkiewicz, 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, T. Isataev, S.M. Lukyanov, V.A. Maslov, K.O. Mendibaev, R.V. Revenko, I. Sivacek, N.K. Skobelev, Yu.G. Sobolev, V.I. Smirnov, S.S. Stukalov, D.A. Testov, V.A. Zernyshkin
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 Beijing PKU
Lanzhou IMP CAS
Czech Republic Prague CTU
VP
Olomouc UP
Rez NPI CAS
Egypt Giza CU
Shibin El Kom 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
Rupnagar IIT Ropar
Roorkee IIT Roorkee
Italy Catania INFN LNS
Legnaro INFN LNL
Messina UniMe
Naples Unina
Japan Wako RIKEN
Tokai JAEA
Kazakhstan Nur-Sultan ENU
Almaty INP
IETP KazNU
Mongolia Ulaanbaatar NRC NUM
Poland Warsaw UW
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
SPbSU
Voronezh VSU
Slovakia Bratislava CU
IP SAS
South Africa Pretoria UNISA
Faure iThemba LABS
Stellenbosch SU
Spain Huelva UHU
Switzerland Villigen PSI
Sweden Goteborg Chalmers
Lund LU
Ukraine Kiev KINR NASU
United Kingdom Manchester UoM
USA Lemont, 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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