A5018135472- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Cold Fusion and Nuclear Reactions
- Superconducting Materials and Applications
- Radiopharmaceutical Chemistry and Applications
- Astro and Planetary Science
- Nuclear Materials and Properties
- Particle physics theoretical and experimental studies
- Radioactive contamination and transfer
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- High-Energy Particle Collisions Research
- Rare-earth and actinide compounds
- Radioactive Decay and Measurement Techniques
- Radioactive element chemistry and processing
- Inorganic Fluorides and Related Compounds
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic confinement fusion research
Joint Institute for Nuclear Research
2016-2025
Dubna State University
1992-2024
Vanderbilt University
1993-2020
Russian State Library
1995-2019
Russian Foundation for Basic Research
2019
International Union of Pure and Applied Chemistry
2019
D. Mendeleyev University of Chemical Technology of Russia
2019
Royal Society
2019
Triangle
2019
Lomonosov Moscow State University
2019
After a brief introduction of the role shell effects in determining limiting nuclear masses, experimental investigation decay properties heaviest nuclei is presented. For production superheavy nuclides fusion, reactions heavy actinide with 48Ca-projectiles have been used. The new nuclei, isotopes elements 112–118, as well their products, together known data for light Z ⩽ 113, give evidence significant increase stability neutron number nucleus. obtained results are discussed context...
The decay properties of ${}^{290}116$ and ${}^{291}116$, the dependence their production cross sections on excitation energies compound nucleus, ${}^{293}116$, have been measured in $^{245}\mathrm{Cm}$ ($^{48}\mathrm{Ca}$, $\mathit{xn}$)${}^{293\ensuremath{-}x}116$ reaction. These isotopes element 116 are daughters 118 isotopes, which produced via $^{249}\mathrm{Cf}+^{48}\mathrm{Ca}$ We performed experiment at two projectile energies, corresponding to ${}^{297}118$ nucleus...
The discovery of a new chemical element with atomic number Z=117 is reported. isotopes (293)117 and (294)117 were produced in fusion reactions between (48)Ca (249)Bk. Decay chains involving 11 nuclei identified by means the Dubna gas-filled recoil separator. measured decay properties show strong rise stability for heavier Z > or = 111, validating concept long sought island enhanced superheavy nuclei.
We have studied the dependence of production cross sections isotopes $^{282,283}112$ and $^{286,287}114$ on excitation energy compound nuclei $^{286}112$ $^{290}114$. The maximum section values $xn$-evaporation channels for reaction $^{238}\mathrm{U}(^{48}\mathrm{Ca},xn)^{286\ensuremath{-}x}112$ were measured to be ${\ensuremath{\sigma}}_{3n}={2.5}_{\ensuremath{-}1.1}^{+1.8}\phantom{\rule{0.3em}{0ex}}\mathrm{pb}$...
A review of the discovery and investigation 'island stability' super-heavy nuclei at separator DGFRS (FLNR, JINR) in fusion reactions (48)Ca projectiles with target (238)U-(249)Cf is presented. The synthesis heaviest nuclei, their decay properties, methods identification are discussed. role shell effects stability demonstrated by comparison experimental data results theoretical calculations. radioactive properties new isotopes elements 112-118 as well products, give evidence significant...
The discovery and investigation of the new region superheavy nuclei at DGFRS separator based on fusion reactions 48Ca with 238U–249Cf target are reviewed. production cross sections summaries decay properties, including results posterior experiments performed SHIP, BGS, TASCA separators, as well chemistry setups, discussed compared theoretical calculations systematic trends in α-decay spontaneous fission properties. properties nuclei, isotopes elements 112–118, their products demonstrate...
The results of experiments designed to synthesize element 115 isotopes in the $^{243}\mathrm{Am}+^{48}\mathrm{Ca}$ reaction are presented. With a beam dose $4.3\ifmmode\times\else\texttimes\fi{}{10}^{18}$ $248\text{\ensuremath{-}}\text{MeV}$ $^{48}\mathrm{Ca}$ projectiles, we observed three similar decay chains consisting five consecutive $\ensuremath{\alpha}$ decays, all detected time intervals about $20\phantom{\rule{0.3em}{0ex}}\mathrm{s}$ and terminated at later by spontaneous fission...
Two years after the discovery of element 117, we undertook a second campaign using (249)Bk+(48)Ca reaction for further investigations production and decay properties isotopes 117 on larger number events. The experiments were started in end April 2012 are still under way. This Letter presents results obtained 1200 hours an experimental run with beam dose (48)Ca about 1.5×10(19) particles. (249)Bk target was irradiated at two energies that correspond to maximum probability channels evaporation...
We describe the discoveries of new superheavy nuclei (a) with Z=107–112 produced in cold fusion reactions between 208 Pb and 209 Bi beams A > 50 (b) Z=113–118 hot actinide 48 Ca. also discuss facilities used these measurements. compare behavior α-decay energies half-lives, spontaneous fission cross sections, excitation functions expectations from theoretical calculations. Finally, we outline future research directions, including studies detailed properties synthesized at higher yields,...
In bombardment of ${}^{244}\mathrm{Pu}$ with ${}^{48}\mathrm{Ca}$, we observed a decay sequence consisting an implanted heavy atom, three subsequent $\ensuremath{\alpha}$ decays, and spontaneous fission (SF), all correlated in time position. The measured energies corresponding intervals were ${E}_{\ensuremath{\alpha}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}9.71$ MeV ( $\ensuremath{\Delta}t\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}30.4$ s), 8.67...
We present the observation of first decay event new nuclide ${}^{292}116$ in running experiment on synthesis $Z=116$ nuclei reaction ${}^{248}\mathrm{Cm}{+}^{48}\mathrm{Ca}.$ The is progress at FLNR, JINR, Dubna.
We have studied the excitation functions of reactions $^{244}\mathrm{Pu}$($^{48}\mathrm{Ca}$,$xn$). Maximum cross sections for evaporation 3--5 neutrons in complete-fusion reaction $^{244}\mathrm{Pu+}^{48}\mathrm{Ca}$ were measured to be ${\ensuremath{\sigma}}_{3n}=2\phantom{\rule{0.3em}{0ex}}\text{pb}$, ${\ensuremath{\sigma}}_{4n}=5\phantom{\rule{0.3em}{0ex}}\text{pb}$, and ${\ensuremath{\sigma}}_{5n}=1\phantom{\rule{0.3em}{0ex}}\text{pb}$. The decay properties $3n$-evaporation product...
In the bombardment of a ${}^{244}\mathrm{Pu}$ target with ${}^{48}\mathrm{Ca}$ ions, we observed two identical decay sequences genetically linked events, each consisting an implanted heavy atom, subsequent \ensuremath{\alpha} decays, and terminated by spontaneous fission. The measured energies corresponding half-lives sequential chain members were ${E}_{\ensuremath{\alpha}}=9.84\ifmmode\pm\else\textpm\fi{}0.05 \mathrm{MeV}$ ${(T}_{1/2}{=1.9}_{\ensuremath{-}0.8}^{+3.3} \mathrm{s})$...
An experiment aimed at the synthesis of isotopes element 120 has been performed using $^{244}\mathrm{Pu}(^{58}\mathrm{Fe},\mathit{xn}){}^{302\ensuremath{-}x}120$ reaction. No decay chains consistent with fusion-evaporation reaction products were observed during an irradiation a beam dose $7.1\ifmmode\times\else\texttimes\fi{}{10}^{18} 330\text{\ensuremath{-}}\mathrm{MeV} {}^{58}\mathrm{Fe}$ projectiles. The sensitivity corresponds to cross section 0.4 pb for detection one decay.
The results of two experiments designed to synthesize element 115 isotopes in the $^{243}\mathrm{Am}+^{48}\mathrm{Ca}$ reaction are presented. Two new elements with atomic numbers 113 and were observed for first time. With 248-MeV $^{48}\mathrm{Ca}$ projectiles, we three similar decay chains consisting five consecutive \ensuremath{\alpha} decays, all detected a total time interval 30 s. Each chain was terminated by spontaneous fission (SF) high-energy release lifetime about day. 253-MeV...
Received 4 February 2004DOI:https://doi.org/10.1103/PhysRevC.69.029902©2004 American Physical Society
A thorough analysis of all stages heavy ion fusion reaction leading to the formation a evaporation residue has been performed. The main goal was gain better understanding whole process and find out what factors quantities, in particular, bring major uncertainty into calculated cross sections, how reliable calculation sections superheavy element may be additional theoretical experimental studies should made this field.
Results from the production and decay properties of element 115 nuclei observed using reaction ${}^{243}\mathrm{Am}+{}^{48}\mathrm{Ca}$ at various beam energies between November 1, 2010, February 26, 2012, Dubna Gas Filled Recoil Separator are presented. This long-running experiment with a total dose $3.3\ifmmode\times\else\texttimes\fi{}{10}^{19}$ carried out in excitation energy range ${E}^{*}=31$--47 MeV ${}^{291}$115 compound nucleus resulted observation three isotopes masses 287, 288,...
In bombardments of $^{248}\mathrm{Cm}$ with $^{22}\mathrm{Ne}$ we discovered two new isotopes, $^{265}106$ and $^{266}106$, by establishing genetic links between their $\ensuremath{\alpha}$ decays spontaneous fussion (SF) or the daughter nuclides. We measured ${E}_{\ensuremath{\alpha}}=8.63\ifmmode\pm\else\textpm\fi{}0.05$ MeV for $^{266}106$ a half-life 1.2 s its $^{262}104$. For ${E}_{\ensuremath{\alpha}}=8.71 \mathrm{to} 8.91$ MeV. From these energies estimated half-lives 10-30 2-30...
The decay properties of the new isotope ${}^{282}113$ and its daughter nuclei have been measured in $^{237}\mathrm{Np}$($^{48}\mathrm{Ca}$, $3n$)${}^{282}113$ reaction. During an irradiation with a beam dose $1.1\ifmmode\times\else\texttimes\fi{}{10}^{19}244$-MeV $^{48}\mathrm{Ca}$ projectiles, two chains originating from odd-odd...