A5000444940- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Nuclear Materials and Properties
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Geophysics and Sensor Technology
- Radiation Detection and Scintillator Technologies
- Gyrotron and Vacuum Electronics Research
- Boron Compounds in Chemistry
- Advanced Frequency and Time Standards
- Graphite, nuclear technology, radiation studies
- Particle Accelerators and Free-Electron Lasers
National Technical University of Athens
2020-2024
CEA Cadarache
2022-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2022-2024
Scattering experiments were performed at the Geel Electron Linear Accelerator (GELINA) to determine differential cross sections of neutron elastic and inelastic scattering on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Fe</a:mi><a:mprescripts/><a:none/><a:mn>54</a:mn></a:mmultiscripts></a:math>, using a highly enriched sample. Neutron energies calculated via time-of-flight technique. The scattered neutrons detected ELastic Inelastic Array (ELISA), spectrometer...
Abstract The fission cross section of $$^{232}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow/> <mml:mn>232</mml:mn> </mml:msup> </mml:math> Th has been measured at fast neutron energies, using a setup based on Micromegas detectors. experiment was performed the 5.5 MV Van de Graaff Tandem accelerator in beam facility National Centre for Scientific Research “Demokritos”. quasi-monoenergetic beams were produced via $$^{3}$$ <mml:mn>3</mml:mn> H(p,n), $$^{2}$$...
Nine neutron induced reactions on Ge isotopes ( 70 Ge(n,2n) 69 Ge, 76 75 73 Ge(n,p) Ga, 72 Ge(n,d/np) 74 Ge(n,α) 71m Zn, 69m Ge(n,nα) Zn) have been measured in this work at energies 16.4-18.9 MeV. For these reactions, most of the experimental datasets literature were obtained with a nat target. However, residual nucleus produced by some reaction channels can also be from neighboring isotopes, acting as contamination for reactions. This contribution must subtracted, based theoretical...
The theoretical description of the 56 Fe neutron induced reaction cross sections is subject many studies within nuclear data community. Based on these studies, issues were discovered in evaluated Fe(n,γ) reaction. Those addressed by implementing changes ENDF/B-VIII.0 evaluation. aim this work to provide a physical interpretation for exploring direct radiative capture mechanism Fe. For calculations, dedicated code (PDIX) was utilized. first results section are presented and discussed.
The aim of the present work was to study cross-section (n,2n) and (n,3n) reactions on 203Tl, by irradiating a natural TlCl pellet target with monoenergetic neutron beams at 16.4, 18.9 MeV. cross section measurements were carried out using activation method, respect 197Au(n,2n)196Au 27Al(n,α)24Na reference reactions. generated in 5.5 MV Tandem accelerator NCSR “Demokritos”, 3H(d,n)4He reaction. Monte Carlo simulations have been performed take into account gamma-ray self-absorption results as...
The ELISA (ELastic and Inelastic Scattering Array) setup, currently installed at the GELINA (Geel Electron Linear Accelerator) facility of EC-JRC (European Commission – Joint Research Centre) in Geel (Belgium), is a unique instrument Europe, used for production high-resolution neutron elastic inelastic scattering cross-section data, relevant nuclear physics applications. setup features 32 liquid organic scintillators detection scattered neutrons coupled with 235U ionization chamber...
The angular distributions of neutron elastic scattering on natural carbon were studied in the fast energy region between 1 and 8 MeV. experiments carried out at white source Geel Electron Linear Accelerator (GELINA) facility by using thin thick samples. This work demonstrates need for samples to avoid strong multiple effects. Neutrons <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>γ</a:mi></a:math> rays from detected ELastic Inelastic Scattering Array (ELISA), a setup consisting...
Τhe 70Ge(n,2n)69Ge, 72Ge(n,a)69mZn, 72Ge(n,p)72Ga and 73Ge(n,p)73Ga reactions have been measured by means of the activation technique at neutron energy 17.9 MeV. The quasimonoenergetic beam was produced via 2H(d,n)3He reaction 5.5 MV Tandem Van de Graaff accelerator NCSR “Demokritos.” Isotopically highly enriched targets 70Ge, 72Ge 73Ge, provided nTOF collaboration CERN, used, thus allowing accurate cross section measurements since no corrections are needed to compensate for parasitic from...
The 72,73Ge(n,p)72,73Ga reaction cross sections were measured at the 5.5MV HV Tandem accelerator of NCSR “Demokritos”, neutron energies 17.7 and 19.3 MeV by using activation method. contamination from (n,d) (n,np) reactions on 73Ge 74 Ge, leading to 72Ge residual nuclei, respectively, has been taken into account, implementing corresponding TENDL-2017. A systematic investigation isotopic effect all Ge isotopes is also presented, threshold up 20MeV, present data along with existing in literature
Cross sections for the 70,76 Ge(n,2n), 72,73 Ge(n,p) and 72,74 Ge(n, α ) reactions have been measured at 5.5 MV tandem T11/25 Accelerator Laboratory of NCSR Demokritos, using activation technique. Neutron beams produced in ~16-20 MeV energy region, by means 3 H(d,n) 4 He reaction. The maximum flux has determined to be order 10 5 n/cm 2 s, while variation neutron beam was monitored a BF3 detector. cross section deduced with respect 27 Al(n, 24 Na 93 Nb(n,2n) 92 m Nb reference reactions....
In the present work, natural Ge targets have been irradiated by neutron beams of 17.7 and 19.3 MeV, at 5MV tandem accelerator NCSR "Demokritos". The cross section 72,74Ge(n,α)69,71Zn 76Ge(n,2n)75Ge reactions, leading to population isomeric states, has deduced with respect 27Al(n,α)24Na 93Nb(n,2n)92mNb reference reactions. After irradiations, induced γ-ray activity target foils, was measured high-resolution HPGe detectors.
Neutron nuclear reactions can provide significant information in the field of physics and applications. Hafnium (Hf) is one rare-earth isotopes with a relative large neutron total cross-section thermal energy region induced reactor materials could lead to production long-lived isomeric states Hf isotopes. Thus, knowledge cross-sections on great importance for basic research Nuclear Physics as well applications concerning interaction neutrons matter. In this study measurements experimental...
In the present work, neutron beams produced via 3H(p,n)3He reaction, were studied at N.C.S.R. “Demokritos”. For detecting and monitoring neutrons, following reference reactions 238U(n,f), 235U(n,f) 237Np(n,f) used. Furthermore, a systematic study of parasitic on target constituents, was performed. At same time, cross sections 232Th(n,f) reaction deduced, in energy range from 2 to 5.5 MeV. Seven actinide targets used, coupled with seven Micromegas detectors, one for each target, detection...