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Synthesis
and Properties of Superheavy Elements,
Structure of Nuclei at
the Limits of Nucleon Stability
Theme
leader:
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S.I. Sidorchuk
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Deputy:
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A.V.
Karpov
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Scientific
leader
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Yu.
Ts. Oganessian
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Participating
countries and international organizations:
Belarus,
Bulgaria, China, Germany, India, Italia, Kazakhstan, Mongolia,
Republic of Korea, Romania, Russia, Slovakia,
South Africa,
Switzerland, Vietnam.
The
problem under study and the main purpose of the research:
Synthesis
of nuclei at stability limits and the investigation of their
properties. Investigation of the mechanisms of
heavy-ion-induced
reactions. Study of the physical and chemical properties of heavy and
superheavy elements.
Projects
in the theme:
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Name
of the project
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Project
Leaders
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Project
code
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1.
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Investigation
of heavy and superheavy
elements
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M.G.
Itkis
A.V. Karpov
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03-5-1130-1-2024/2028
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2.
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Light
exotic nuclei at the borders of nucleon stability
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G.
Kaminski
S.I. Sidorchuk
Deputies:
V.
Chudoba
A.S. Fomichev
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03-5-1130-2-2024/2028
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Projects:
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Name
of the project
Laboratory
(Subdivision)
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Project
Leaders
Responsible
from laboratories
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Status
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1.
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Investigation
of heavy and superheavy
elements
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M.G.
Itkis
A.V. Karpov
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FLNR
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A.M.
Abakumov, F.Sh. Abdullin, D. Abdusamadzoda, N.V. Aksenov, Yu. V.
Albin, A.A. Astakhov, A.Yu. Bodrov, A.A. Bogachev,
G. A.
Bozhikov, N.S. Bublikova, M.L. Chelonokov. V.I. Chepigin,
E.V.
Chernysheva, S.I. Chuprakov, H.M. Devaraja, S.N. Dmitriev,
A.V. Guljaev, A.V. Guljaeva, A.I. Holtzman, D. Ibadullayev,
A.V. Isaev, Yu.M. Itkis, I.N. Izosimov, D.E. Katrasev, G.N.
Knyazheva, P. Kohout, A. Kohoutova, A.B. Komarov, N.D. Kovrijnykh,
E.M. Kozulin,
N.I. Kozulina, E.V. Krasnoyarova, L. Krupa,
N.Yu. Kurkova,
D.A. Kuznetsov, A.A. Kuznetsova, A.Sh.
Madumarov, O.N. Malyshev, R. Mukhin, I.V. Muravyov, K.V. Novikov,
A.S. Novoselov, A. Opihal, I.V. Pchelintsev, O.V. Petrushkin, E.V.
Pishchalnikova,
A.V. Podshibyakin, A.N. Polyakov, A.G.
Popeko, Yu. A. Popov,
L.S. Porobanyuk, V.A. Rachkov, A.M.
Rodin, A.V. Rykhlyuk,
A.V. Sabelnikov, R.N. Sagaidak, V.
Saiko, V.S. Salamatin, S. Sathayan, E.O. Savelieva, B.
Saylaubekov, M.V. Shumeiko, E.A. Sokol,
D.I. Soloviev, G.Ya.
Starodub, V.G. Subbotin, A.I. Svirikhin,
M. Tezekbayeva,
R.S. Tikhomirov, Yu.S. Tsyganov, V.K. Utenkov,
V.I. Vakatov,
V. Yu. Vedeneev, A.A. Voinov, I.V. Vorobyov,
M.G. Voronyuk,
G.K. Vostokin, A.V. Yeremin, S.A. Yuhkimchuk,
A.M. Zubareva
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Brief
annotation and scientific rationale:
The
Project aims to study the heaviest nuclei and atoms in a
comprehensive way: conducting experiments on the synthesis of
elements with Z=119 and 120; synthesizing new isotopes of
superheavy elements; studying nuclear (spectroscopy) and chemical
properties of superheavy elements; investigating nuclear reaction
dynamics, including multi-nucleon transfer, leading to the
formation of neutron-rich heavy nuclei.
The
project will be implemented mainly at the Superheavy Element
Factory of JINR commissioned in 2020. The studies on nuclear
reaction dynamics will be carried out at the U-400 accelerator
complex and will proceed at the U-400R following the upgrade.
Expected
results upon completion of the project:
Synthesis
of new superheavy elements 119 and 120.
Study
of the chemical properties of SHE.
Synthesis
of superheavy nuclei and study of their decay properties.
Investigation
of the chemical properties of superheavy elements.
Spectroscopy
of the radioactive decay of heavy and superheavy nuclei.
First
experiments aimed to measure the masses of superheavy nuclei.
Study
of the dynamics of heavy-ion nuclear reactions.
Expected
results of the project in the current year:
Experiments
at the DGFRS-2 separator of the SHE Factory aimed to study
production cross sections of nuclei in reactions
with 48Са, 50Ti, 54Cr, 58Fe
ions and the properties of synthesized nuclei.
Test
experiments for synthesizing elements with Z>118.
Experiments
aimed at studying the properties of the radioactive decay (α-,
β-decay,
spontaneous fission properties) of
short-lived
isotopes with Z>100 (No, Rf, and Sg) produced in reactions
with Ne, Ca, Ti, and Cr ions at the SHELS and GRAND (DGFRS-3)
separators using the GABRIELA and SFiNX detecting systems.
Experiments
for studying the chemical properties of Cn and Fl at the SHE
Factory.
Development
of methods for manufacturing accelerating targets of stable and
radioactive isotopes, stable under long irradiation with
high-intensity heavy-ion beams.
Development
of techniques for producing metal-organic alloys of titanium and
chrome for accelerating their ions using the MIVOC method.
Investigation
of mass-energy and angular distributions of fragments formed in
multinucleon transfer reactions.
Study
of the entrance channel influence on the mass-energy and angular
distributions of fragments formed in heavy-ion reactions.
2.
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Light
exotic nuclei at the borders
of nuclear stability
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G.
Kaminski
S.I. Sidorchuk
Deputies:
V.
Chudoba
A.S. Fomichev
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FLNR
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E.
Almanbetova, A. Amer, A. Azhibekov, D. Aznabaev,
E.
Batchuluun, S.G. Belogurov, A.A. Bezbakh, I.V. Butusov,
E.M.
Gazeeva, M.S. Golovkov, A.V. Gorshkov, V.A. Gorshkov,
L.V.
Grirogenko, T. Isataev, A. Ismailova, B.R. Khamidullin,
A.M.
Khirk, S.A. Klygin, A.G. Knyazev, G.A. Kononenko,
S.A.
Krupko, S.M. Lukyanov, V.A. Maslov, B. Mauey, K.A. May,
K.
Mendibaev, K.D. Molotorenko, I.A. Muzalevskiy, E.Yu. Nikolskii,
Yu.L. Parfenova, Yu.E. Penionzhkevich, S.A. Rimzhanova,
Yu.M.
Sereda, A.V. Shakhov, P.G. Sharov, N.K. Skobelev,
R.S.
Slepnev, V.I. Smirnov, Yu.G. Sobolev, S.V. Stepantsov,
S.S.
Stukalov, G. M. Ter-Akopian, A.N. Vorontsov, R. Wolski,
D.
Yertaeva
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Brief
annotation and scientific rationale:
The
investigations aim to study the structure of light nuclei and
nuclear systems near and beyond the borders of nuclear stability
using direct nuclear reactions (charge-exchange, one- or
two-nucleon transfer), to investigate rare decay channels and the
influence of reaction mechanisms on the observed properties of the
studied nuclei. Direct reactions employed for studying the
structure of isotopes near the borders of nuclear stability allow
for more reliable data acquisition and the revision of existing
knowledge. The experimental programme will be mainly implemented
at the ACCULINNA-1,2 and MAVR setups using the upgraded U-400M
accelerator complex of FLNR JINR that allow a wide range of
experimental studies of light exotic nuclei using secondary beams
in the energy range of 5–50 MeV/nucleon.
The
ACCULINNA-2 separator is equipped with a radio frequency filter
for additional purification of secondary beams, a magnetic
spectrometer for reaction product separation, a cryogenic target
complex of hydrogen and helium isotopes, an array of neutron
detectors based on stilbene crystals, and systems for the
registration of charged particles.
Expected
results upon completion of the project:
Study
of the properties of the drip-line isotopes of light nuclei.
First
experiments using the tritium target.
Structure
of the drip-line isotopes of light nuclei in (d,p) and (d,n),
(t,p), (t,a), (p,d), etc. reactions.
Studies
of exotic decays, including 2-n, 4-n, and 2-p emission.
Expected
results of the project in the current year:
Study
of nuclei near the boundaries of nucleon stability. Conduct
of the first experiment 6,8He+4He.
Preparation for and conduct of experiments at the ACCULINNA-2
fragment separator using radioactive beams and the cryogenic
targets
H2,
D2, 3He,4He.
Investigation
of the isotopes of oxygen and fluorine at nucleon drip-lines
using the missing mass method at the MAVR
set-up.
Experiments
on measuring the cross sections of individual reaction channels
at ACCULINNA-1 employing the MULTI spectrometer.
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Collaboration
Country
or International Organization
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City
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Institute
or laboratory
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Belarus
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Minsk
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IE
NASB
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Bulgaria
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Sofia
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INRNE
BAS
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China
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Beijing
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PKU
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Lanzhou
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IMP
CAS
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Germany
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Darmstadt
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GSI
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Heidelberg
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MPIK
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India
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Kolkata
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VECC
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Manipal
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MU
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New
Delhi
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IUAC
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Roorkee
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IIT
Roorkee
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Rupnagar
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IIT
Ropar
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Italy
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Naples
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Unina
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Kazakhstan
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Almaty
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INP
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Mongolia
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Ulaanbaatar
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CGL
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Republic
of Korea
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Daejeon
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IBS
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Romania
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Bucharest
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IFIN-HH
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Russia
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Dimitrovgrad
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SSC
RIAR
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Dubna
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IPTP
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Moscow
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INEOS
RAS
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MSU
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NRC
KI
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SINP
MSU
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Moscow,
Troitsk
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INR
RAS
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Sarov
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VNIIEF
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Sosnovy
Bor
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VNIPIET
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Saint
Petersburg
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IAI
RAS
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Ioffe
Institute
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KRI
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SPbSU
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Slovakia
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Bratislava
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CU
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South
Africa
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Pretoria
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UNISA
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Somerset
West
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iThemba
LABS
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Switzerland
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Villigen
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PSI
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Vietnam
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Hanoi
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IOP
VAST
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Ho
Chi Minh City
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HCMUE
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