A5009829866- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Radiopharmaceutical Chemistry and Applications
- Radioactive Decay and Measurement Techniques
- Astro and Planetary Science
- Particle accelerators and beam dynamics
- Nuclear Materials and Properties
- Machine Learning in Materials Science
- Quantum, superfluid, helium dynamics
- Diverse Scientific and Engineering Research
- Boron Compounds in Chemistry
- Radiation Detection and Scintillator Technologies
- Radioactive element chemistry and processing
- Advanced NMR Techniques and Applications
- Ion-surface interactions and analysis
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
Institute of Nuclear and Particle Physics
2001-2021
National Centre of Scientific Research "Demokritos"
2000-2021
National Technical University of Athens
2006-2020
University of Stuttgart
2020
Université Libre de Bruxelles
2020
Texas A&M University
2008-2019
Foundation for Research and Technology Hellas
2014
University of Piraeus
2014
Hellenic Military Academy
2012
Los Alamos National Laboratory
2009
The ($n,\ensuremath{\gamma}$) cross section of $^{197}\mathrm{Au}$ has been measured at n_TOF in the resolved resonance region, up to 5 keV, with aim improving accuracy an energy range where it is not yet considered standard. measurements were performed two different experimental setup and detection techniques, total method based on ${\mathrm{C}}_{6}$${\mathrm{D}}_{6}$ detectors, absorption calorimetry a 4$\ensuremath{\pi}$ BaF${}_{2}$ array. By comparing data collected accurate sets...
The transverse flow and relative midrapidity yield of isotopically identified light charged particles (LCPs) has been examined for the 35 MeV/nucleon ${}^{70}\mathrm{Zn}+{}^{70}\mathrm{Zn}$, ${}^{64}\mathrm{Zn}+{}^{64}\mathrm{Zn}$, ${}^{64}\mathrm{Ni}+{}^{64}\mathrm{Ni}$ systems. A large enhancement LCPs was observed to near projectile rapidity. In particular, this increased more neutron-rich demonstrating a preference production fragments in region. Additionally, extracted, which provides...
The transverse flow of intermediate mass fragments (IMFs) has been investigated for the 35 MeV/u ${}^{70}\mathrm{Zn}+{}^{70}\mathrm{Zn}$, ${}^{64}\mathrm{Zn}+{}^{64}\mathrm{Zn}$, and ${}^{64}\mathrm{Ni}+{}^{64}\mathrm{Ni}$ systems. A transition from IMF strongly depending on system, in most violent collisions, to a dependence charge peripheral reactions, is shown. This was shown be sensitive density symmetry energy using antisymmetrized molecular-dynamics model. results present an...
Methods of extraction the symmetry energy (or enthalpy) coefficient to temperature ratio from isobaric and isotopic yields fragments produced in Fermi-energy heavy-ion collisions are discussed. We show that methods consistent when hot fragmenting source is well characterized its excitation composition properly taken into account. The results independent mass number detected fragments, which suggests their fate decided very early reaction.
The cross section of the ${}^{88}\mathrm{Sr}(p,\ensuremath{\gamma}{)}^{89}\mathrm{Y}$ reaction was determined by in-beam measurements at energies ${E}_{p}=1.4--5\mathrm{MeV}$ relevant to nucleosynthetic p process. At ${E}_{p}>~3.5\mathrm{MeV},$ \ensuremath{\gamma} angular distributions were obtained using one HPGe detector 80% relative efficiency, whereas ${E}_{p}<~3.5\mathrm{MeV}$ they measured means an array four detectors all shielded with BGO crystals for Compton background supression....
In heavy-ion collisions, isoscaling provides a method for studying the evolution of nuclear symmetry energy as function excitation energy. One challenge in using is to accurately determine neutron-to-proton ratio ($N/Z$) fragmenting source. Isoscaling results are presented reactions $^{86,78}\mathrm{Kr}+^{64,58}\mathrm{Ni}$ at 35 MeV/nucleon taken on NIMROD-ISiS array Texas A University. The $N/Z$ source was calculated from isotopically identified fragments and experimentally measured...
The NIMROD-ISiS array was used to study the transverse flow of intermediate mass fragments in 35 MeV/nucleon ${}^{70}\mathrm{Zn}+{}^{70}\mathrm{Zn}$, ${}^{64}\mathrm{Zn}+{}^{64}\mathrm{Zn}$, and ${}^{64}\mathrm{Ni}+{}^{64}\mathrm{Ni}$ reactions. fragment previously shown be sensitive density dependence symmetry energy. To explore model results, antisymmetrized molecular dynamics, constrained stochastic mean-field models were each compared experimental results extract information on form...
The isoscaling of heavy projectile residues from peripheral heavy-ion reactions at 15--25 MeV/nucleon is employed to obtain information on the process $N/Z$ equilibration. Recent mass spectrometric data $^{86}\mathrm{Kr}$ (15 MeV/nucleon) with $^{64,58}\mathrm{Ni}$ and $^{124,112}\mathrm{Sn}$ were first analyzed. isotopically resolved yield distributions fragments in range $Z=26--39$ for analysis. ratios ${R}_{21}(N,Z)$ each pair systems exhibit (i.e., an exponential dependence fragment...
As a continuation of systematic study reactions relevant to the astrophysical $p$ process, cross sections $^{74,76}\mathrm{Se}(p,\ensuremath{\gamma})\phantom{\rule{0.3em}{0ex}}^{75,77}\mathrm{Br}$ and $^{82}\mathrm{Se}(p,n)\phantom{\rule{0.3em}{0ex}}^{82}\mathrm{Br}$ have been measured at energies from 1.3 $3.6\phantom{\rule{0.3em}{0ex}}\text{MeV}$ using an activation technique. The results are compared predictions Hauser-Feshbach statistical model calculations NON-SMOKER MOST codes....
The production cross sections of projectilelike fragments from the interaction 15 MeV/nucleon ${}^{86}$Kr with ${}^{64}$Ni and ${}^{58}$Ni ${}^{124}$Sn ${}^{112}$Sn were measured using a magnetic separator emphasis on neutron-rich isotopes. Neutron pickup isotopes (with up to six neutrons picked target) observed large sections. Calculations involving deep-inelastic transfer model as well microscopic constrained molecular dynamics (CoMD) for primary stage coupled statistical deexcitation code...
Correlations of midrapidity light charged particles (LCPs) and intermediate mass fragments (IMFs) with projectile-like (PLFs) have been examined from the 35 MeV/u ${}^{70}\mathrm{Zn}+{}^{70}$Zn, ${}^{64}\mathrm{Zn}+{}^{64}$Zn, ${}^{64}\mathrm{Ni}+{}^{64}$Ni reaction systems. A new method was developed to examine flow respect PLF. The invariant PLF-scaled allowed for dynamics $Z=1--4$ be studied. Strong differences in were observed between different isotopes. In particular, most $n$-rich LCPs...
Peripheral collisions of $^{40}\mathrm{Ca}$ and $^{48}\mathrm{Ca}$ projectiles at 32 MeV/nucleon on $^{112}\mathrm{Sn}$ $^{124}\mathrm{Sn}$ targets were studied in this work. The fragments the projectile-like source (quasiprojectile) collected with a charged-particle multidetector array. average value neutron-to-proton ratio $N/Z$ quasiprojectiles formed reactions was determined two approaches. first is direct reconstruction approach using isotopically resolved hindered by undetected...
The $^{191}\mathrm{Ir}$$(n,2n)$$^{190}\mathrm{Ir}$ cross section was measured by means of the activation technique at four neutron energies in range 10.0--11.3 MeV. quasimonoenergetic beam produced via $^{2}\mathrm{H}$$(d,n)$$^{3}\mathrm{He}$ reaction 5.5 MV Tandem Van de Graaff accelerator NCSR ``Demokritos.'' for population second high spin (${11}^{\ensuremath{-}}$) isomeric state along with sum populating both ground (${4}^{\ensuremath{-}}$) and first (${1}^{\ensuremath{-}}$). Statistical...
We report on the design, modeling and fabrication by multi-photon polymerization of a complex medical fluidic device. The physical dimensions built micro-valve prototype are compared to those its computer-designed model. Important issues such as achieving high dimensional resolution ability control distortion due shrinkage presented discussed. operational performance both CAD-created models under steady blood flow conditions was evaluated through computational fluid dynamics analysis.
Three $\ensuremath{\gamma}$-decaying isomers in the $N=Z+1$ nucleus ${}^{95}\mathrm{Ag}$ have been identified for first time. The nuclei were produced via ${}^{58}\mathrm{Ni}{(}^{40}\mathrm{Ca},p2n)$ reaction and separated by using GSI on-line mass separator. emitted $\ensuremath{\gamma}$ rays measured with a multi-Ge detector setup anticoincidence positrons. individual $\ensuremath{\gamma}$-decay cascades assigned to ${}^{95}\mathrm{Ag},$ representing depopulation of at 344-, 2531-,...
The neutron-induced fission cross section of ${}^{245}$Cm was measured at n_TOF in a wide energy range and with high resolution. dependence, single measurement from 30 meV to 1 MeV neutron energy, has been determined 5$%$ accuracy relative the ${}^{235}$U(n,f) section. In order reduce uncertainty on absolute value, data have normalized thermal recent measurements performed ILL BR1. overlap, results are fair agreement some previous confirm, average, evaluated ENDF/B-VII.0 database, although...
The critical phenomena of the liquid-gas phase transition has been investigated in reactions 78,86Kr+58,64Ni at beam energy 35 MeV/nucleon using Landau free approach with isospin asymmetry as an order parameter. Fits to fragments showed three minima suggesting system be regime a first transition. relation m =-{\partial}F/{\partial}H, which defines parameter and its conjugate field H, experimentally verified from linear dependence mirror nuclei yield ratio data, on source. slope parameter, is...
In the resonant Raman scattering (RRS) process emitted photon exhibits a continuous energy distribution with high cutoff limit. This depends on chemical state of element under examination. present work, possibility identifying V atoms by employing RRS spectroscopy semiconductor Si(Li) detector is investigated. A proton induced Cr Kα x-ray beam was used as incident radiation, having fixed lower than K-absorption edge. The net distributions extracted from dispersive spectra metallic and its...