A5012691985- Nuclear physics research studies
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Education, Psychology, and Social Research
- Advanced Chemical Physics Studies
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Gamma-ray bursts and supernovae
- Radioactive Decay and Measurement Techniques
- Rare-earth and actinide compounds
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Stellar, planetary, and galactic studies
- Radiation Therapy and Dosimetry
- Photocathodes and Microchannel Plates
Institute of Nuclear Physics
2024
Czech Academy of Sciences, Nuclear Physics Institute
2012-2023
Joint Institute for Nuclear Research
1983-2022
Czech Technical University in Prague
2017-2022
Istituto Nazionale di Fisica Nucleare
2020
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2010-2020
Kurchatov Institute
2019
Institute for Theoretical and Experimental Physics
2019
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2019
Nuclear Research Institute Rez (Czechia)
2017-2018
DANSS is a highly segmented 1~m${}^3$ plastic scintillator detector. Its 2500 one meter long strips have Gd-loaded reflective cover. The detector placed under an industrial 3.1~$\mathrm{GW_{th}}$ reactor of the Kalinin Nuclear Power Plant 350~km NW from Moscow. distance to core varied on-line 10.7~m 12.7~m. building provides about 50~m water-equivalent shielding against cosmic background. detects almost 5000 $\widetilde\nu_e$ per day at closest position with background less than 3$\%$....
The DANSS project is aimed at creating a relatively compact neutrino spectrometer which does not contain any flammable or other dangerous liquids and may therefore be located very close to the core of an industrial power reactor. As result, it expected that high flux would provide about 15,000 IBD interactions per day in detector with sensitive volume 1 m3. High segmentation plastic scintillator will allow suppress background down ∼1% level. Numerous tests performed simplified pilot...
The 19F(p, α)16O reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach energy region astrophysical interest (Ecm ≲ 300 keV), because hindrance effect Coulomb barrier. Trojan Horse (TH) method was thus used to access this region, by extracting quasi-free contribution 2H(19F, α16O)n 19F(3He,...
The cross sections of the 2H(d,p)3H and 2H(d,n)3He reactions have been measured via Trojan Horse method applied to quasi-free 2H(3He,p3H)1H 2H(3He,n3He)1H processes at 18 MeV off proton in 3He. For first time, bare nucleus S(E) factors determined from 1.5 MeV, across relevant region for standard Big Bang nucleosynthesis, down thermal energies deuterium burning pre-main-sequence (PMS) phase stellar evolution, as well future fusion reactors. Both energy dependence absolute value deviate by...
Abstract Fluorine abundance determination is of great importance in stellar physics to understand s-elements production and mixing processes asymptotic giant branch (AGB) stars. Up now, theoretical models overproduce F abundances AGB stars with respect the observed values, thus calling for further investigation reactions involving fluorine. In particular, 19 F( p , α ) 16 O reaction main destruction channel fluorine at bottom convective envelope stars, an H-rich environment where it can...
The $^{17}\mathrm{O}$($p,\ensuremath{\alpha}$)$^{14}\mathrm{N}$ reaction is of fundamental relevance in several astrophysical scenarios, such as novae, asymptotic giant branch nucleosynthesis, and $\ensuremath{\gamma}$-ray astronomy. We report on the indirect measurement bare-nucleus cross section low-energy region. In particular, two resonances at ${E}_{R}^{\mathrm{c}.\mathrm{m}.}=65$ keV ${E}_{R}^{\mathrm{c}.\mathrm{m}.}=183$ keV, which dominate rate inside Gamow window, have been...
The reaction ${}^{17}\mathrm{O}(n,\ensuremath{\alpha}){}^{14}\mathrm{C}$ was studied at energies from ${E}_{\mathrm{c}.\mathrm{m}.}=0$ to ${E}_{\mathrm{c}.\mathrm{m}.}=350\phantom{\rule{0.28em}{0ex}}\mathrm{keV}$ by using the quasifree deuteron breakup in three-body ${}^{17}\mathrm{O}+d\ensuremath{\rightarrow}\ensuremath{\alpha}+{}^{14}\mathrm{C}+p$, which extended Trojan Horse indirect method (THM) neutron-induced reactions. It is found that ${}^{18}\mathrm{O}$ excited state...
The $^{10}\mathrm{B}(p,{\ensuremath{\alpha}}_{0})^{7}\mathrm{Be}$ bare nucleus astrophysical $S(E)$ factor has been measured for the first time at energies from about 100 keV down to 5 by means of Trojan Horse method (THM). In this energy region, is strongly dominated 8.699 MeV $^{11}\mathrm{C}$ level (${J}^{\ensuremath{\pi}}={\frac{5}{2}}^{+}$), producing an $s$-wave resonance centered 10 in entrance channel. Up now, only high--energy tail measured, while low-energy trend extrapolated...
The $\ensuremath{\nu}\mathrm{GeN}$ experiment is aimed to investigate neutrino properties using antineutrinos from the reactor of Kalinin Nuclear Power Plant. experimental setup located at about 11 meters center 3.1 ${\mathrm{GW}}_{\mathrm{th}}$ core. Scattering detected with low energy threshold high purity germanium detector. Passive and active shieldings are used suppress all kinds backgrounds coming surrounding materials cosmic radiation. description together first results presented....
A new measurement of the 11B(p,?0)8Be has been performed applying Trojan horse method (THM) to 2H(11B,?80Be)n quasi-free reaction induced at a laboratory energy 27 MeV. The astrophysical S(E) factor extracted from ?600 keV down zero by means an improved data analysis technique and it compared with direct available in literature. range investigated here overlaps region light element LiBeB stellar burning that future aneutronic fusion power plants using 11B+p fuel cycle. investigation...
The Trojan horse nucleus invariance for the binary reaction cross section extracted from was tested using quasifree $^{3}\mathrm{He}$($^{6}\mathrm{Li}$,$\ensuremath{\alpha}\ensuremath{\alpha}$)H and $^{3}\mathrm{He}$($^{7}\mathrm{Li}$,$\ensuremath{\alpha}\ensuremath{\alpha}$)$^{2}\mathrm{H}$ reactions. sections $^{6}\mathrm{Li}$($d$,$\ensuremath{\alpha}){}^{4}$He $^{7}\mathrm{Li}$($p$,$\ensuremath{\alpha}){}^{4}$He processes were in framework of plane wave approximation. They are compared...
The detection of the neutrinos produced in p−p chain and CNO cycle can be used to test Standard Solar Model. 3He(α,γ)7Be reaction is first 2nd 3rd branch chain, therefore, uncertainty its cross section sensitively influences prediction 7Be 8B neutrino fluxes. Despite importance large number experimental theoretical works devoted this reaction, knowledge on at energies characterizing core Sun (15 keV - 30 keV) limited further efforts are needed reach desired (≈ 3%) accuracy. precise external...
The ${}^{15}\mathrm{N}(p,\ensuremath{\gamma}){}^{16}\mathrm{O}$ reaction provides a path from the CN cycle to CNO bi-cycle and tri-cycle. measured astrophysical factor for this is dominated by resonant capture through two strong ${J}^{\ensuremath{\pi}}={1}^{\ensuremath{-}}$ resonances at ${E}_{R}=312$ 962 keV direct ground state. Asymptotic normalization coefficients (ANCs) seven excited states in $^{16}\mathrm{O}$ were extracted comparison of experimental differential cross sections...
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
Background: The $^{6}\mathrm{Li}(p,\ensuremath{\gamma})^{7}\mathrm{Be}$ cross section influences a variety of astrophysical scenarios, including big-bang and stellar nucleosynthesis. In recent years, conflicting results direct measurements have been published, reporting contradictory low-energy trends.Purpose: To shed light on the contradiction between existing data sets, reaction was studied using asymptotic normalization coefficient (ANC) technique which up-to-now never used for this...
The ${}^{14}\mathrm{C}(n,\phantom{\rule{-0.16em}{0ex}}\ensuremath{\gamma}){}^{15}\mathrm{C}$ reaction plays an important role in inhomogeneous big bang models. In Timofeyuk et al. [Phys. Rev. Lett. 96, 162501 (2006)] it was shown that the radiative capture at astrophysically relevant energies is a peripheral reaction, i.e., overall normalization of its cross section determined by asymptotic coefficient (ANC) for ${}^{15}\mathrm{C}\ensuremath{\rightarrow}{}^{14}\mathrm{C}+n$. Here we present...
The $^{14}\mathrm{C}$ + $n\ensuremath{\leftrightarrow}^{15}\mathrm{C}$ system has been used as a test case in the evaluation of new method to determine spectroscopic factors that uses asymptotic normalization coefficient (ANC). proved be unsuccessful for this case. As part experimental program, ANCs ${}^{15}$C ground state and first excited were determined using heavy-ion neutron transfer reaction well inverse kinematics ($d$,$p$) reaction, measured at Texas A Cyclotron Institute. values...
The results of a search for hydrogen-like atoms consisting $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with nickel target has been seen in terms characteristic pairs their breakup the same ($178 \pm 49$) and Coulomb final state interaction ($653 42$). Using these analysis yields first value lifetime $\tau=(2.5_{-1.8}^{+3.0})$ fs model-independent measurement S-wave isospin-odd scattering length...
The observation of hydrogenlike πK atoms, consisting π^{-}K^{+} or π^{+}K^{-} mesons, is presented. atoms are produced by 24 GeV/c protons from the CERN PS accelerator, interacting with platinum nickel foil targets. breakup (ionization) in same targets yields characteristic pairs, called "atomic pairs," small relative momenta Q pair center-of-mass system. upgraded DIRAC experiment observed 349±62 such atomic corresponding to a signal 5.6 standard deviations. This first statistically...