Pavel P. Povinec
A5090907377- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Nuclear Physics and Applications
- Isotope Analysis in Ecology
- Radiation Detection and Scintillator Technologies
- Nuclear and radioactivity studies
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astro and Planetary Science
- Dark Matter and Cosmic Phenomena
- Geology and Paleoclimatology Research
- Planetary Science and Exploration
- Groundwater and Isotope Geochemistry
- Atomic and Subatomic Physics Research
- Radioactive element chemistry and processing
- Particle Detector Development and Performance
- Nuclear physics research studies
- Archaeology and ancient environmental studies
- Radioactive Decay and Measurement Techniques
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Solar and Space Plasma Dynamics
- Graphite, nuclear technology, radiation studies
- Astrophysics and Cosmic Phenomena
Comenius University Bratislava
2015-2024
University Library in Bratislava
2023
Czech Academy of Sciences
2022
Czech Academy of Sciences, Nuclear Physics Institute
2022
Institute of Informatics and Statistics
2022
International University of Monaco
2003-2020
University College London
2020
Dokuz Eylül University
2019
University of the Basque Country
2019
Mangalore University
2019
Radioactive emissions into the atmosphere from damaged reactors of Fukushima Dai-ichi nuclear power plant (NPP) started on March 12th, 2011. Among various radionuclides released, iodine-131 ((131)I) and cesium isotopes ((137)Cs (134)Cs) were transported across Pacific toward North American continent reached Europe despite dispersion washout along route contaminated air masses. In Europe, first signs releases detected 7 days later while peak activity level was observed between 28th 30th. Time...
The Fukushima nuclear accident in March 2011 has released a large amount of radioactive pollutants to the environment. Of pollutants, iodine-129 is long-lived radionuclide and will remain environment for millions years. This work first report levels inorganic speciation (129)I seawater depth profiles collected offshore June 2011. Significantly elevated concentrations surface water were observed with highest (129)I/(127)I atomic ratio 2.2 × 10(-9) 40 km Fukushima. Iodide was found as dominant...
The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability study different isotopes track outgoing electrons provides means discriminate underlying mechanisms for by measuring half-life electron angular energy distributions.
Abstract. Radionuclide impact of the Fukushima Dai-ichi nuclear power plant accident on distribution radionuclides in seawater NW Pacific Ocean is compared with global fallout from atmospheric tests weapons. Surface and water column samples collected during Ka'imikai-o-Kanaloa (KOK) international expedition carried out June 2011 were analyzed for 134Cs, 137Cs, 129I 3H. The 3H levels surface offshore varied between 0.002–3.5 Bq L−1, 0.01–0.8 μBq 0.05–0.15 respectively. At sampling site about...
Observing double beta decay with no neutrinos in the final state, would signal existence of lepton number violating processes and hint at neutrino being a Majorana particle. The impressive effort represented by NEMO-3 experiment sets important constraints on mass lepton-number processes.
The impact of the Fukushima-derived radiostrontium ((90)Sr and (89)Sr) on western North Pacific Ocean has not been well established, although (90)Sr concentrations recorded in surface seawater offshore damaged Fukushima Dai-ichi nuclear power plant were some areas comparable to or even higher than (as those December 2011 with 400 kBq m(-3)(90)Sr) (137)Cs levels. total amount released marine environment form highly radioactive wastewater could reach about 1 PBq. Long-term series (1960-2010)...
Significance A massive atmospheric release of radioactive 106 Ru occurred in Eurasia 2017, which must have been caused by a sizeable, yet undeclared nuclear accident. This work presents the most compelling monitoring dataset this release, comprising 1,100 and 200 deposition data points from Eurasian region. The suggest reprocessing facility located Southern Urals, possibly Mayak complex. crashed satellite as well on Romanian territory (despite high activity concentrations) can be excluded....
Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is most accurately recorded chondrite fall. Its pre-atmospheric orbit cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection from a primitive asteroid. Recovered only hours falling, composition of largely unmodified by terrestrial environment. It contains abundant hydrated silicates formed during fluid-rock reactions, carbon- nitrogen-bearing...
We present limits on the spin-independent interaction cross section of dark matter particles with silicon nuclei, derived from data taken a cryogenic calorimeter 0.35 g target mass operated in CRESST-III experiment. A baseline nuclear recoil energy resolution (1.36±0.05) eVnr, currently lowest reported for macroscopic particle detectors, and corresponding threshold (10.0±0.2) eVnr have been achieved, improving sensitivity to light masses below 160 MeV/c2 by factor up 20 compared previous...
The NEMO-3 experiment at the Modane Underground Laboratory has investigated double-$\beta$ decay of $^{48}{\rm Ca}$. Using $5.25$ yr data recorded with a $6.99\,{\rm g}$ sample Ca}$, approximately $150$ candidate events have been selected signal-to-background ratio greater than $3$. half-life for two-neutrino Ca}$ measured to be $T^{2\nu}_{1/2}\,=\,[6.4\, ^{+0.7}_{-0.6}{\rm (stat.)} \, ^{+1.2}_{-0.9}{\rm (syst.)}] \times 10^{19}\,{\rm yr}$. A search neutrinoless yields null result and...
The NEMO-3 collaboration reports the half-life of ${}^{150}$Nd via two-neutrino double-beta decay mode to an unprecedented accuracy. For zero-neutrino ${}^{150}$Nd, distinctive signature possible Majorana nature neutrinos, no observations but sets new upper bounds for in various scenarios beyond standard model.
The full data set of the NEMO-3 experiment has been used to measure half-life two-neutrino double beta decay $$^{100}$$ Mo ground state Ru, $$T_{1/2} = \left[ 6.81 \pm 0.01\,\left( \text{ stat }\right) ^{+0.38}_{-0.40}\,\left( syst \right] \times 10^{18}$$ year. two-electron energy sum, single electron spectra and distribution angle between electrons are presented with an unprecedented statistics $$5\times 10^5$$ events a signal-to-background ratio $$\sim $$ 80. Clear evidence for Single...