I. Gheorghe
A5010959801- Nuclear physics research studies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Quantum Chromodynamics and Particle Interactions
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Particle physics theoretical and experimental studies
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Rare-earth and actinide compounds
- X-ray Spectroscopy and Fluorescence Analysis
- Radiopharmaceutical Chemistry and Applications
- Advanced X-ray and CT Imaging
- Advanced X-ray Imaging Techniques
- Quantum, superfluid, helium dynamics
- Laser-Plasma Interactions and Diagnostics
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Nuclear Materials and Properties
- Civil and Geotechnical Engineering Research
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2016-2025
Czech Academy of Sciences, Institute of Physics
2012-2025
Institute for Physics
2025
Universitatea Națională de Știință și Tehnologie Politehnica București
2023
University of Bucharest
2014-2023
Extreme Light Infrastructure - Nuclear Physics
2014-2023
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2016-2023
Spiru Haret University
2023
Valahia University of Targoviste
2017-2021
Florida State University
2019
An enhanced electric octupole (E3) strength of 45(5) W.u. has been measured for the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mn>3</a:mn></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mrow><a:mn>0</a:mn></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup></a:mrow></a:math> transition in <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"...
Mean lifetime measurements of low-lying yrast positive- and negative-parity states <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Gd</a:mi><a:mprescripts/><a:none/><a:mn>150</a:mn></a:mmultiscripts></a:math> have been performed with the ROSPHERE array using <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mmultiscripts><b:mi>Ce</b:mi><b:mprescripts/><b:none/><b:mn>140</b:mn></b:mmultiscripts><b:mo>(</b:mo><b:mmultiscripts><b:mi...
The photoneutron cross sections of $^{162,163}\mathrm{Dy}$ have been measured for the first time in an energy region from neutron threshold (${S}_{n}$) up to $\ensuremath{\approx}13\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$. $(\ensuremath{\gamma},n)$ reaction was induced with quasimonochromatic laser Compton-scattered $\ensuremath{\gamma}$ rays, produced at NewSUBARU laboratory. corresponding $\ensuremath{\gamma}$-ray strength functions ($\ensuremath{\gamma}\mathrm{SF}$) calculated sections....
Photoneutron cross sections were measured for the seven stable samarium isotopes ${}^{144,147,148,149,150,152,154}\mathrm{Sm}$ near neutron threshold with quasi-monochromatic laser-Compton scattering $\ensuremath{\gamma}\phantom{\rule{0.28em}{0ex}}\mathrm{rays}$. Our photoneutron are found to be low by 20%--37% relative existing data. The data analyzed talys reaction code considering Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasiparticle random phase approximation (QRPA) model and axially...
Photodisintegration of $^{9}\mathrm{Be}$ through the $1/{2}^{+}$ state near neutron threshold and cluster dipole resonance below giant was measured with quasi-monochromatic $\ensuremath{\gamma}$-ray beams produced in inverse Compton scattering laser photons. The cross section for is revisited, being consistent 2001 data. sum-rule which however degenerates two-body $(n\text{\ensuremath{-}}^{8}\mathrm{Be})$ three-body...
Using γ-ray beams produced in the inverse Compton scattering between CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> laser photons and relativistic electrons, we have calibrated electron beam energies nominal energy range 550-974 MeV at synchrotron radiation facility New-SUBARU. The Compton-scattering (LCS) were from 561 to 1728 keV detected with a high-purity germanium detector. determined by reproducing full peaks of Monte Carlo...
New measurements of photofission and photoneutron reactions on $^{238}\mathrm{U}$ $^{232}\mathrm{Th}$ in the giant dipole resonance (GDR) energy region were performed at laser Compton-scattering $\ensuremath{\gamma}$-ray source NewSUBARU synchrotron radiation facility using a high-and-flat efficiency moderated $^{3}\mathrm{He}$ detection array. The neutron-multiplicity sorting high-multiplicity fission neutron coincidence events was dedicated dependent, multiple firing statistical treatment....
Photoneutron cross sections were measured in the $^{209}\mathrm{Bi}$($\ensuremath{\gamma}, xn$) reaction with $x=1--4$ at energies from neutron threshold to 40 MeV using quasimonochromatic laser Compton-scattering $\ensuremath{\gamma}$-ray beams. A novel technique of direct neutron-multiplicity sorting a flat-efficiency detector was used. Results are compared positron in-flight annihilation data Livermore and Saclay as well bremsstrahlung data. The present yields consistent latest...
The $\ensuremath{\gamma}$-ray strength functions and level densities of $^{73,74}\mathrm{Ge}$ have been extracted up to the neutron-separation energy ${S}_{n}$ from particle-$\ensuremath{\gamma}$ coincidence data using Oslo method. Moreover, function $^{74}\mathrm{Ge}$ above has determined photoneutron measurements; hence these two experiments cover range ${\mathrm{E}}_{\ensuremath{\gamma}}\ensuremath{\approx}1$--13 MeV for $^{74}\mathrm{Ge}$. obtained show that both display an increase in...
Photoneutron cross sections were measured for five stable Nd isotopes, ${}^{143,144,145,146,148}\mathrm{Nd}$, near neutron threshold with highly monochromatic laser-Compton scattering $\ensuremath{\gamma}$ rays. The photoneutron data compared the calculations performed talys reaction code inputs of Skyrme Hartree-Fock-Bogoliubov (HFB) plus quasi-particle random phase approximation (QRPA) model and axially symmetric deformed Gogny HFB QRPA $E1$ $\ensuremath{\gamma}$-ray strength. Using...
Nuclear data in general, and neutron-induced reaction cross sections particular, are important for a wide variety of research fields. They play key role the safety criticality assessment nuclear technology, not only existing power reactors but also radiation dosimetry, medical applications, transmutation waste, accelerator-driven systems, fuel cycle investigations future reactor systems as Generation IV. Applications related to fields study level densities stellar nucleosynthesis....
The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, their properties established. Monte Carlo shell model accounts for results unveils an unexpectedly complex landscape coexisting shapes: a prolate excitation is located at surprisingly high energy (3463 keV), with collective state 286 keV above it, first such observation in Ni isotopes. evolution minimum...
Lifetimes of low-lying excited states in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Mo</a:mi><a:mprescripts/><a:none/><a:mn>102</a:mn></a:mmultiscripts></a:math> populated the two-neutron transfer reaction <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mmultiscripts><b:mi>Mo</b:mi><b:mprescripts/><b:none/><b:mn>100</b:mn></b:mmultiscripts><b:mo>(</b:mo><b:mmultiscripts><b:mi...
The high-energy \(\gamma \) rays from the Giant Dipole Resonance (GDR) decay of \(^{56,60,62}\mathrm {Ni}^{*}\) nuclei at finite temperature between approximately 1.5 and 2 MeV, produced in \(^{32,34,36}\mathrm {S}+{^{24,26}\mathrm {Mg}}\) reactions bombarding energies 78 90 were measured. experiment was then analyzed with a statistical model using Monte Carlo approach. Some evidence is found within analysis on presence an extra yield tail which may be attributed to Pygmy excited nucleus....
The half-life of the yrast ${I}^{\ensuremath{\pi}}={2}^{+}$ state in neutron-rich nucleus ${}^{188}$W has been measured using fast-timing techniques with HPGe and LaBr${}_{3}$:Ce array at National Institute Physics Nuclear Engineering, Bucharest. resulting value ${t}_{1/2}=0.87(12)$ ns is equivalent to a reduced transition probability $B(E2;{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{1}^{+})=85(12)$ W.u. for this transition. $B(E2;{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{1}^{+})$ compared...
The newly built second experimental area EAR2 of the n_TOF spallation neutron source at CERN allows to perform (n, charged particles) experiments on short-lived highly radioactive targets. This paper describes a detection apparatus and procedure for determination cross-section 7Be(n,α)α reaction, which represents one focal points toward solution cosmological Lithium abundance problem, whose only measurement, thermal energy, dates back 1963. apparently unsurmountable difficulties stemming...