A. Spătaru
A5032785018- Nuclear physics research studies
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactive contamination and transfer
- Advanced NMR Techniques and Applications
- Astro and Planetary Science
- Mass Spectrometry Techniques and Applications
- Neutrino Physics Research
- Atomic and Molecular Physics
- Isotope Analysis in Ecology
- Particle Accelerators and Free-Electron Lasers
- Radiopharmaceutical Chemistry and Applications
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Spacecraft and Cryogenic Technologies
- Advanced X-ray and CT Imaging
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Research Data Management Practices
- DNA and Nucleic Acid Chemistry
Extreme Light Infrastructure - Nuclear Physics
2019-2024
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2019-2024
University of Bucharest
2019-2023
GSI Helmholtz Centre for Heavy Ion Research
2020-2022
Universitatea Națională de Știință și Tehnologie Politehnica București
2009-2020
Mass measurements of the $^{69}$As, $^{70,71}$Se and $^{71}$Br isotopes, produced via fragmentation a $^{124}$Xe primary beam at FRS GSI, have been performed with multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) Ion Catcher an unprecedented resolving power almost 1,000,000. For $^{69}$As isotope, this is first direct measurement. A uncertainty 22 keV was achieved only 10 events. $^{70}$Se 2.6 obtained, corresponding to relative accuracy $\delta$m/m = 4.0$\times 10^{-8}$, less...
The multinucleon transfer (MNT) reaction approach was successfully employed for the first time to measure isomeric ratios (IRs) of 211Po isomer (25/2+) and its ground state (9/2+) at IGISOL facility using a 945 MeV 136Xe beam impinged on 209Bi natPb targets. dominant production isomers compared corresponding states consistently revealed in α-decay spectra. Deduced IR populated through 136Xe+natPb found have an enhancement ≈1.8-times than that observed 136Xe+209Bi. State-of-the-art...
We have extracted the nuclear level density of ${}^{128}$Te from a $(\mathrm{p},\mathrm{p} '\gamma)$ scattering experiment using large-volume \labr\ and \cebr\ detectors ELI-NP at 9~MV Tandem facilities IFIN-HH. The decay data were normalised photonuclear data, resulting in densities without intrinsic model dependencies constant temperature or Fermi gas models. measured follows closely between expectations these two models, but we observe clear divergence microscopic based on Skyrme force.
Direct mass measurements of neutron-deficient nuclides around the $N=50$ shell closure below $^{100}$Sn were performed at FRS Ion Catcher (FRS-IC) GSI, Germany. The nuclei produced by projectile fragmentation $^{124}$Xe, separated in fragment separator and delivered to FRS-IC. masses 14 ground states two isomers measured with relative uncertainties down $1\times 10^{-7}$ using multiple-reflection time-of-flight spectrometer FRS-IC, including first direct $^{98}$Cd $^{97}$Rh. A new...
Abstract An exploratory program to establish the multi-nucleon transfer (MNT) reaction as a new research direction at FRS Ion Catcher (FRS-IC) has started GSI. Its long term goal is use of secondary exotic beams from Super-FRS drive MNT reactions. The near perform proof-of-principle cross section and mass measurements with slowed-down 238 U on targets inside FRS-IC gas cell. experimental efficiencies expected rates are estimated using production sections Langevin model followed by...
We present first preliminary results of a novel method for measuring independent isotopic fission yields (IIFYs) spontaneous (SF) via direct mass measurements, at the FRS Ion Catcher (FRS-IC) GSI. Fission products were generated from 252 Cf source installed in cryogenic stopping cell, and identified counted with multiple-reflection time-of-flight spectrometer (MR-TOF-MS) FRS-IC, utilizing well-established measurement data analysis methods. The MR-TOF-MS resolves isobars unambiguously, even...
Abstract The transition between the spherical and deformed shapes of nuclei (shape phase transition) is an interesting property that enriches our understanding nuclear structure. One method for studying it through measurement a wide range atomic masses derivation two-neutron separation energies (S 2n ). Using multiple-reflection time-of-flight mass spectrometer at FRS Ion Catcher, GSI, in region A ∼ 150 were measured. This allowed study shape transitions this chart. In addition, comparison...
Abstract The production of very neutron-rich nuclides heavier than fission fragments is an ongoing experimental challenge. Multi-nucleon transfer reactions (MNT) have been suggested as a method to produce these nuclides. By thermalizing the reaction products in gas-filled stopping cells, we can deliver them cooled high-quality beams decay, laser and mass spectrometry experiments. High precision will allow for first time universally unambiguously identify atomic proton numbers ions produced...
The FRS Ion Catcher at GSI enables precision experiments with thermalized projectile and fission fragments. At the same time it serves as a test facility for Low-Energy Branch of Super-FRS FAIR. has been commissioned its performance characterized in five 238U 124Xe fragments produced energies range from 300 to 1000 MeV/u. High almost element-independent efficiencies thermalization short-lived nuclides relativistic have obtained. High-accuracy mass measurements more than 30 performed...
Here we report on the characterization of one large-volume LaBr$_{3}$:Ce detectors for ELIGANT project at ELI-NP. The main focus this work is response function high-energy $\gamma$ rays such detectors. In particular, compare a selection unfolding methods to resolve small structures in $\gamma$-ray spectra with high-energies. Three have been compared using energies up 12 MeV obtained an experiment 3 MV Tandetron\texttrademark\ facility IFIN-HH. results show that iterative approach gives best...
The 2019 Mazurian Lakes Conference on Physics was held in Piaski, a vacation resort located at the lake of Bełdany heart Great District, from 1 st to 7 th September 2019.It 36 meeting series initiated over 50 years ago, 1968, by Professor Zdzisław Wilhelmi and his students collaborators.Throughout these years, conferences have gained world-wide reputation for their high scientific merit unique atmosphere.
The multinucleon transfer (MNT) reaction approach was successfully employed for the first time to measure isomeric ratios (IRs) of $^{211}$Po (25/2$^+$) isomer and its (9/2$^+$) ground state at IGISOL facility using a 945 MeV $^{136}$Xe beam impinged on $^{209}$Bi $^{\rm nat}$Pb targets. dominant production isomers compared corresponding states consistently revealed in $\alpha$-decay spectra. Deduced IR populated through $^{136}$Xe+$^{\rm found enhance $\approx$1.8-times than observed...
Here we report on the first measurements of $\gamma$-ray strength functions and nuclear level densities ${}^{112,114}$Sn performed at 9~MV Tandem accelerator facilities IFIN-HH using Oslo method. We extract thermodynamic properties as well both gross fine pygmy dipole resonance for systematic comparison in chain Sn isotopes. The results are compared with microscopic models implemented TALYS reaction code, fully quasiparticle-phonon model underlying structure ${}^{112,114}$Sn. experimental...
Nuclear mass is a key property of atomic nuclei.The accurate determination nuclear masses provides information for the shell structure and deformations.The FRS Ion Catcher experimental setup at GSI, Darmstadt was used to perform measurements 252 Cf fragments using multiple-reflection time-of-flight spectrometer.The reported results are compared previous their implication in estimation two-neutron separation energy discussed.
Due to technical constraints this article was published in volume 240:1 with erroneous citation ID number 3 whereas should have been 73 which is corrected as such. Springer Nature sincerely apologizes towards the author(s) for inconvenience caused.