A5085692073- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Nuclear Materials and Properties
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Boron Compounds in Chemistry
- Radioactive element chemistry and processing
- Pulsed Power Technology Applications
- Nuclear materials and radiation effects
- Neutrino Physics Research
- Nuclear and radioactivity studies
- Radiation Effects and Dosimetry
- Radiopharmaceutical Chemistry and Applications
- Chemical Synthesis and Characterization
- Graphite, nuclear technology, radiation studies
- Quantum, superfluid, helium dynamics
National Centre for Nuclear Research
2013-2021
Joint Institute for Nuclear Research
2013-2015
Czech Academy of Sciences, Nuclear Physics Institute
2013
Institute of Atomic Energy
1997-2009
Neutron activation and gamma spectrometry are usable also for the determination of cross-sections different neutron reactions. We have studied cross-section yttrium (n,xn) threshold reactions using quasi mono-energetic source based on reaction 7Li target at Nuclear Physics Institute ASCR in Rez. Yttrium suitable candidates fast field measurement by detectors. Fast monitoring is necessary already today a wide range accelerator facilities will gain importance future reactors generation IV,...
The paper describes cross-section measurements consisting of neutron activation using a 7Li(p,n) quasi mono-energetic source and gamma-ray spectrometry performed at the Nuclear Physics Institute Czech Academy Sciences in Řež, Republic. analysis excitation functions neutron-induced threshold reactions for energy range from 17 up to 34 MeV is presented. cross sections population both ground isomeric states were measured yttrium gold. A comprehensive comparison with earlier experimental data...
The cross-sections of relativistic deuteron reactions on natural copper were studied by the means activation method. beams produced JINR Nuclotron (Russia) with energies from 1 GeV up to 8 used. Lack such prevents usage foils for beam integral monitoring. monitors will help us improve determination during ADS studies. yttrium samples are very suitable detectors monitoring neutron fields not only in But experimental cross-section data higher energy threshold still missing. This situation is...
The collaboration Energy and Transmutation of Radioactive Waste uses different setups consisting lead, natural uranium graphite irradiated by relativistic protons deuterons to study transmutation radioactive materials produced neutrons.The activation samples are used determine integral proton or deuteron beams also neutron flux in places experimental set-ups.Unfortunately almost no cross-section data for with GeV energies available.The similar situation is threshold (n,xn) reactions neutrons...
The main detector system at the Nuclotron-based Ion Collider fAcility (NICA) located in Dubna, Russia is Multi-Purpose Detector (MPD). For better calibration reason, MPD needs an additional trigger for off-beam of sub-detectors and rejection (veto) cosmic muons. should also be useful practical astrophysics observations showers. consortium NICA-PL group defines goals basic assumptions Cosmic Ray (MCORD). This article describes conceptual design simulation plans MCORD based on plastic...
A modern approach to nuclear energy involves reprocessing like transmutations of spent fuel products reduce their radiotoxicity and time needed for storage. For this purpose, they are immobilized in inert matrices made zirconia can be "burned" fast neutron reactor or Accelerator Driven System. These spherical form obtained by sol-gel process. The paper presents a method microspheres fabrication based on the combined Complex Sol-Gel Process double extraction process consisting preparation...
The idea of the first method is to search neutron energy for ratio fission cross section capture selected actinide isotope from nuclear data base that equal measured fissioned and captured Np-237.
Abstract Neptunium-237 samples were irradiated in a spallation neutron field produced accelerator-driven system (ADS) setup QUINTA. Five experiments carried out on the accelerators at JINR Dubna - one carbon (C6+), three deuteron, and proton beam. The energy was 24 GeV, deuteron 2, 4 8 respectively, 660 MeV incineration study method based gamma-ray spectrometry. During analysis of spectra several fission products actinide identified. Fission product activities yielded number fissions....
Np-237 samples were irradiated in spallation neutrons produced ADS setup QUINTA.Three experiments carried out.The accelerated beam consisted of deuteron ions energy 2, 4 and 8 GeV respectively.The method was based on gamma-ray spectrometry measurement.During analysis the spectra several fission products one actinide identified.Fission product activities gave number fissions.The (Np-238), a result neutron capture by captures.
Abstract This report presents a concept of constructing detector dedicated for detection muons observed during measurements carried out at the MPD (Multi-Purpose Detector) that is currently under construction NICA facility, Russia, Dubna. It has been proposed to design and build an additional will complement current set increase its measurement capabilities. The main goal this project provide information from cosmic pass in both in-beam off-beam experiments. Hence, called COsmic Ray Detector...
This work was performed within the international project “Energy plus Transmutation of Radioactive Wastes” (E&T - RAW) for investigations energy production and transmutation radioactive waste nuclear power industry. 89Y (Yttrium 89) samples were located in Quinta assembly order to measure an average high neutron flux density three different ranges using deuteron proton beams from Dubna accelerators. Our analysis showed that range 20.8 32.7 MeV is higher than 11.5 both protons with 0.66 GeV...
Study of the deep subcritical systems (QUINTA) using relativistic beams is performed within project “Energy and Transmutation Radioactive Wastes” (E&T – RAW). The experiment assembly was irradiated by deuteron/proton beam (Dubna NUCLOTRON). We calculated neutron energy spectrum inside whole threshold (n,xn) reactions in yttrium (Y-89) foils. There are almost no experimental cross section data for those reactions. New Y-89(n,xn) measurements were carried out at Svedberg laboratory (TSL)...
Multi-Purpose Detector ( MPD ) is a main part of new Ion Collider fAcility NICA located in Dubna, Russia. To increase functionality, it was proposed to add an additional muon trigger system for off-beam calibration the sub-detectors and rejection cosmic ray background during experiments. The could also be very useful astrophysical observations showers initiated by high energy primary particles. This article describes goals MCORD detector early stage design, based on plastic scintillators...
There are few experimental data for neutron cross-section libraries in (n,xn) reactions various materials at energies above 20 MeV. For MeV, these set of important fluence monitoring and spectra unfolding future generation IV nuclear reactors. were attempts to measure the cross-sections on natural cobalt bismuth incident about 90 MeV 140 These measurements made using quasi-monoenergetic facility iThemba LABS, South Africa. In addition, The Svedberg Laboratory Sweden, similar experiments...
Collaboration E&T -
The development of advanced nuclear systems as generation IV reactors, accelerator driven and fusion reactors needs new reliable high quality data.The relativistic proton light ion Nuclotron at JINR Dubna was used to study cross-sections deuteron reactions on copper.The obtained excitation functions different radionuclide productions by deuterons copper were for determination beam integral during last experiment with E+T set-up using foil.The discrepancy which we had between values means two...
Currently the development of nuclear systems is heading to with fast neutrons instead thermal ones.Such are mainly reactors generation IV family and accelerator driven systems.Unfortunately possibilities monitoring limited.One possible principles use activation detectors.It has shown up that yttrium very good candidate act as detector neutrons.The advantages namely its (n,xn) threshold reactions fact only one naturally occurring isotope.To be it necessary know cross-sections sufficiently...
The QUINTA uranium target is a deeply sub-critical active core consisting of 512 kg natural rods arranged hexagonally.The irradiated by pulsed beam relativistic ions using the JINR NUCLOTRON accelerator.In paper lead shielding impact on fast neutron spectrum in studied.The energy spectra inside volume threshold reaction yttrium ( 89 Y) were measured for same deuteron 4 GeV when assembly was enfolded with and without shielding.The (n,xn) rates samples located determined through gamma...