K. Kessaci
A5084602048- Nuclear physics research studies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Astronomical and nuclear sciences
- Cold Fusion and Nuclear Reactions
- Advanced Chemical Physics Studies
- Inorganic and Organometallic Chemistry
- Boron Compounds in Chemistry
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- Catalytic Processes in Materials Science
- Analytical chemistry methods development
- Radiopharmaceutical Chemistry and Applications
- Radiation Detection and Scintillator Technologies
Université de Strasbourg
2019-2024
Centre National de la Recherche Scientifique
2019-2023
Institut Pluridisciplinaire Hubert Curien
2021-2023
European Organization for Nuclear Research
2023
Institut National de Physique Nucléaire et de Physique des Particules
2021
Background: An analysis of recent experimental data [J. Khuyagbaatar et al., Phys. Rev. C 104, L031303 (2021)] has established the existence two fissioning states in $^{253}\mathrm{Rf}$: The ground state and a low-lying isomeric state, most likely involving same neutron single-particle configurations as lighter isotone $^{251}\mathrm{No}$. ratio fission half-lives measured $^{253}\mathrm{Rf}$ was used to predict properties $1/{2}^{+}$ $^{251}\mathrm{No}$ draw conclusions stability against...
The Pixel Luminosity Telescope is a silicon pixel detector dedicated to luminosity measurement at the CMS experiment LHC. It located approximately 1.75 m from interaction point and arranged into 16 "telescopes", with eight telescopes installed around beam pipe either end of each telescope composed three individual sensor planes. per-bunch instantaneous measured by counting events where all planes in register hit, using special readout full LHC bunch-crossing rate 40 MHz. information read out...
Isomeric states in $^{256}\mathrm{No}$ were investigated using internal conversion electron and $\ensuremath{\gamma}$-ray spectroscopy with the GABRIELA detection system at focal plane of SHELS recoil separator, Flerov Laboratory for Nuclear Research (FLNR, JINR, Dubna). The nuclei interest produced highly asymmetric fusion-evaporation reaction $^{238}\mathrm{U}(^{22}\mathrm{Ne},4n)^{256}\mathrm{No}$. emission electrons $\ensuremath{\gamma}$ rays occurring between a implantation subsequent...
Abstract The complete-fusion reaction 204 Pb( 48 Ca,2 n ) 250 No was used to study two activities of with distinct half-lives. A total 1357 events were observed in the SFiNx neutron detection system. average number neutrons emitted per spontaneous fission determined be . unusually symmetrical shape prompt multiplicity distribution restored and presented for first time. Statistical tests performed compare distributions associated ground state K-isomer decays.
Very heavy nuclei owe their stability against spontaneous fission to quantum shell effects, which depend on the local density of single-particle states. The height but also width and structure barrier in multi-dimensional deformation space determine half-lives. Other effects come into play, such as conservation numbers superfluidity or stiffness system process. This is why odd have longer partial half-lives with respect even neighbours multi-quasi-particle states, high-K are thought be more...
This study of isomeric states in $^{255}\mathrm{No}$ was performed with the GABRIELA detector array at focal plane SHELS recoil separator. The $^{208}\mathrm{Pb}(^{48}\mathrm{Ca},$ ${xn)}^{256\text{--}x}\mathrm{No}$ fusion-evaporation reaction used to produce nobelium isotopes a beam energy optimized for one-neutron and two-neutron evaporation channels. These were studied by decay spectroscopy leading identification means calorimetric method. In order isolate radioactive decays from more...
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An experiment on the study of $^{246}$Fm spontaneous fission was conducted using SHELS separator. The isotope synthesized in complete fusion reaction $^{40}$Ar beam ions and $^{208}$Pb target nuclei. neutron yields ($\overline{\nu} = 3.79\pm0.30$, $\sigma^{2}_{\nu} 2.1$) were obtained SFiNx detector system. multiplicity distribution emitted prompt neutrons restored Tikhonov method statistical regularisation ($\overline{\nu}_{r} 3.79\pm0.20$, $\sigma^{2}_{\nu r} 2.8$). branching ratio...
Abstract The structure of the <?CDATA ${}_{102}^{254}{\mathrm{No}}_{152}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:mrow> <mml:msubsup> <mml:mrow /> <mml:mn>102</mml:mn> </mml:mrow> <mml:mn>254</mml:mn> </mml:msubsup> <mml:msub> <mml:mn>No</mml:mn> <mml:mn>152</mml:mn> </mml:msub> </mml:math> nucleus has been studied for more than 20 years: last publications on its decay spectroscopy are from LBNL [1], GSI [2], JYFL [3] and ANL [4]....
The GABRIELA [1] set-up is used at the FLNR to perform detailed nuclear structure studies of transfermium nuclei.Following modernization VASSILISSA separator (SHELS) [2] detection system has also been upgraded.The characteristics upgraded will be presented along with results from some recent electronics tests.