Á. Horváth
A5084077447- Nuclear physics research studies
- Nuclear Physics and Applications
- Radioactivity and Radon Measurements
- Radioactive contamination and transfer
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Atomic and Subatomic Physics Research
- Groundwater and Isotope Geochemistry
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Geophysical Methods and Applications
- Radioactive element chemistry and processing
- Karst Systems and Hydrogeology
- Marine and environmental studies
- Radiation Dose and Imaging
- Geochemistry and Geologic Mapping
- Nuclear and radioactivity studies
- Medical Imaging Techniques and Applications
- Advanced Chemical Physics Studies
- Methane Hydrates and Related Phenomena
- Earthquake Detection and Analysis
Eötvös Loránd University
2014-2024
European Spallation Source
2024
National Superconducting Cyclotron Laboratory
1998-2002
Michigan State University
1998-2002
Rikkyo University
2000
Kinematically complete measurements for Coulomb dissociation of $^{11}\mathrm{Li}$ into $^{9}\mathrm{Li}$+2n were made at 28 MeV/nucleon. The n-n correlation function suggests a large source size the two-neutron emission. electromagnetic excitation spectrum has peak, as anticipated in low-energy dipole resonance models, but post-breakup acceleration $^{9}\mathrm{Li}$ fragment is observed, indicating very short lifetime excited state and favoring direct breakup mechanism.
We have performed a kinematically complete measurement of the Coulomb dissociation 28 MeV/nucleon $^{11}\mathrm{Li}$ into $^{9}\mathrm{Li}$ and two neutrons by Pb target. From energies angles emitted $^{9}\mathrm{Li}$, excitation energy E was determined on an event-by-event basis, cross section as function constructed. The photonuclear ${\mathrm{\ensuremath{\sigma}}}_{\mathit{E}1}$(E) dipole strength dB(E1)/dE were from section. has peak at E=1.0 MeV width \ensuremath{\Gamma}=0.8 MeV. These...
Subjecting a physical system to extreme conditions is one of the means often used obtain better understanding and deeper insight into its organization structure. In case atomic nucleus, such approach investigate isotopes that have very different neutron-to-proton (N/Z) ratios than in stable nuclei. Light, neutron-rich exhibit most asymmetric N/Z those lying beyond limits binding, which undergo spontaneous neutron emission exist only as short-lived resonances (about 10-21 s), provide...
The interaction of ${}^{6}\mathrm{He}$ with ${}^{209}\mathrm{Bi}$ has been studied over a range energies well below the nominal Coulomb barrier. A ${}^{4}\mathrm{He}$ group remarkable intensity, first observed in previous experiment at near-barrier energies, continues to dominate reaction sub-barrier regime. total cross section nearly 200 mb was measured for this 6 MeV This very large value is shown be consistent deduced from simultaneously-measured elastic scattering angular distribution.
NeuLAND (New Large-Area Neutron Detector) is the next-generation neutron detector for R3B (Reactions with Relativistic Radioactive Beams) experiment at FAIR (Facility Antiproton and Ion Research). detects neutrons energies from 100 to 1000 MeV, featuring a high detection efficiency, spatial time resolution, large multi-neutron reconstruction efficiency. This achieved by highly granular design of organic scintillators: 3000 individual submodules size 5 × 250 cm3 are arranged in 30 double...
Detailed spectroscopy of the neutron-unbound nucleus $^{28}\mathrm{F}$ has been performed for first time following proton/neutron removal from $^{29}\mathrm{Ne}/^{29}\mathrm{F}$ beams at energies around $230\text{ }\text{ }\mathrm{MeV}/\mathrm{nucleon}$. The invariant-mass spectra were reconstructed both $^{27}{\mathrm{F}}^{(*)}+n$ and $^{26}{\mathrm{F}}^{(*)}+2n$ coincidences revealed a series well-defined resonances. A near-threshold state was observed in reactions is identified as ground...
Global changes are increasingly pushing for more sustainable resources, such as geothermal energy. The thermal waters of the karst system in Budapest (Hungary) have so far been used mainly balneological purposes. It is thus expected that near future they will intensely be purposes well. To this end, a comprehensive research project has launched by Geological Survey Supervisory Authority Regulatory Affairs to gain better understanding and assess impact projects via numerical simulations. One...
Demand for groundwater resources as drinking water is highly increasing worldwide. Groundwater accounts to 92% of sources also in Hungary. Through rock-water interactions, different elements can be enriched including naturally occurring radioactive elements, which may have considerable health risk. Due the hierarchically organized movement groundwater, spatial distribution dissolved solid content, and associated physical, chemical kinetic processes are systematized. Areas hydraulic regimes...
17,19C nuclei have been investigated by proton inelastic scattering on a liquid hydrogen target at intermediate energies. Two peaks were observed in the Doppler-corrected γ-ray spectra with energies of 210(6), 331(6) keV 17C and 72(4), 197(6) 19C corresponding to decay two excited states both nuclei. Analyzing reaction cross sections, tentative spin values determined for states. The experimental results are reasonable agreement predictions shell model calculations.
The neutron-rich unbound fluorine isotope ^{30}F_{21} has been observed for the first time by measuring its neutron decay at SAMURAI spectrometer (RIBF, RIKEN) in quasifree proton knockout reaction of ^{31}Ne nuclei 235 MeV/nucleon. mass and thus one-neutron-separation energy ^{30}F determined to be S_{n}=-472±58(stat)±33(sys) keV from measurement invariant-mass spectrum. absence a sharp drop S_{n}(^{30}F) shows that "magic" N=20 shell gap is not restored close ^{28}O, which agreement with...
Radon and thoron isotopes are responsible for approximately half of the average annual effective dose to humans. Although half-life is short, it can potentially enter indoor air from adobe walls. Adobe was a traditional construction material in Great Hungarian Plain. Its major raw materials alluvial sediments area. Here, seasonal radon activity concentrations were measured 53 dwellings 7 settlements by pairs etched track detectors. The results show that elevated these proportions with values...
Abstract The β -delayed neutron-emission probabilities of 28 exotic neutron-rich isotopes Pm, Sm, Eu, and Gd were measured for the first time at RIKEN Nishina Center using Advanced Implantation Detector Array (AIDA) BRIKEN neutron detector array. existing -decay half-life ( T 1/2 ) database was significantly increased toward more isotopes, uncertainties previously values decreased. new data not only constrain theoretical predictions half-lives probabilities, but also allow probing mechanisms...
The 14C(n, γ)15C reaction is important in neutron-induced CNO cycles of stellar evolution phases beyond the main sequence. chain reactions primordial nucleosynthesis neutron-rich environment an inhomogeneous big bang also involves reaction. We have used a beam 15C ions at E/A = 35 MeV to measure cross sections for breakup on targets C, Al, Zn, Sn, and Pb. Coulomb part section was determined as function decay energy. By principle detailed balance, neutron capture then This excitation rises...
Groundwater is an important freshwater resource, which can be affected by geogenic radionuclide contamination. To make decisions regarding the use and management of groundwater, understanding controls mobility critical. In southern foreland a granitic outcrop in Hungary, high gross alpha activity concentration was measured drinking water wells, related probably to presence uranium. It has been suggested that groundwater flow system may key aspect understand uranium groundwater. The goal...
The use of UAVs to map ionising radiation resulting from radioactive decay is gaining popularity among researchers due its efficiency and safety. Many studies have been conducted, most them using expensive sensors. present research aims investigate the applicability an affordable detector in areas where anomalies natural sources occur. In this research, we a DJI Matrice 210 V2 RTK quadcopter equipped with cost-effective Safecast bGeigie Nano Kit sensor take measurements at different...