A5041308773- Nuclear Physics and Applications
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Radiation Therapy and Dosimetry
- Particle physics theoretical and experimental studies
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Particle Detector Development and Performance
- Quantum, superfluid, helium dynamics
- High-Energy Particle Collisions Research
- Astro and Planetary Science
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Gamma-ray bursts and supernovae
- Particle Accelerators and Free-Electron Lasers
- Quantum chaos and dynamical systems
- Cold Fusion and Nuclear Reactions
Helmholtz-Zentrum Dresden-Rossendorf
2015-2024
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2024
Universidad Complutense de Madrid
2024
Karlsruhe Institute of Technology
2011-2023
Oak Ridge National Laboratory
2022
University of Notre Dame
2011-2022
International Atomic Energy Agency
2022
Princeton University
2022
European Organization for Nuclear Research
2019-2021
Australian National University
2020
The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars solar neutrino production are summarized critically evaluated. Recommended values uncertainties provided for key sections, a recommended spectrum is given $^{8}\mathrm{B}$ neutrinos. Opportunities further increasing precision of rates also discussed, including new facilities, experimental techniques, improvements theory. This review, which summarizes conclusions...
The E1 strength distribution in Ni68 has been investigated using Coulomb excitation inverse kinematics at the RB3−LAND setup and by measuring invariant mass one- two-neutron decay channels. giant dipole resonance a low-lying peak (pygmy resonance) have observed 17.1(2) 9.55(17) MeV, respectively. measured polarizability is compared to relativistic random phase approximation calculations yielding neutron-skin thickness of 0.17(2) fm. A method analysis applicable neutron-rich nuclei developed,...
The dipole response of the $N=50$ nucleus $^{90}\mathrm{Zr}$ was studied in photon-scattering experiments at electron linear accelerator ELBE with bremsstrahlung produced kinetic energies 7.9, 9.0, and 13.2 MeV. We identified 189 levels up to an excitation energy 12.9 Statistical methods were applied estimate intensities inelastic transitions correct ground-state for their branching ratios. In this way we derived photoabsorption cross section neutron-separation energy. This matches well...
The dipole strength of the $N=50$ nucleus ${}^{86}$Kr was studied in photon-scattering experiments using bremsstrahlung produced with electron beams energies 7.9 and 11.2 MeV delivered by linear accelerator ELBE as well quasimonoenergetic linearly polarized $\ensuremath{\gamma}$ rays 10 within range from 4.7 to 9.3 HI$\ensuremath{\gamma}$S facility. A high-pressure gas target used. We identified 39 levels up an excitation energy 10.1 MeV. Simulations $\ensuremath{\gamma}$-ray cascades were...
We present new measurements of the $^{7}\mathrm{Be}(p,\ensuremath{\gamma})^{8}\mathrm{B}$ cross section from ${\overline{E}}_{\text{c.m.}}=116$ to $2460\phantom{\rule{0.3em}{0ex}}\text{keV}$ (where c.m. means center-of-mass), which incorporate several improvements over our previously published experiment, also discussed here. Our lead...
In an experiment at the SISSI/LISE facility of GANIL, we used projectile fragmentation a ${}^{78}\mathrm{Kr}$ primary beam 73 MeV/nucleon to produce new isotopes astrophysical interest. We obtained clear evidence for existence five ${}^{60}\mathrm{Ga}$, ${}^{64}\mathrm{As}$, ${}^{69,70}\mathrm{Kr}$, and ${}^{74}\mathrm{Sr}$. However, did not find any ${}^{69}\mathrm{Br}$, whereas comparable nuclei were observed with more than 1000 counts. The isotope ${}^{69}\mathrm{Br}$ is thus deduced be...
The spallation residues produced in the bombardment of 56}Fe at 1.5, 1.0, 0.75, 0.5 and 0.3 A GeV on a liquid-hydrogen target have been measured using reverse kinematics technique Fragment Separator GSI (Darmstadt). This has permitted full identification charge mass all isotopes with cross-sections larger than 10^{-2} mb down to Z=8. Their individual production recoil velocities five energies are presented. Production compared previously existing data empirical parametric formulas, often...
The dipole response of the magic $N=50$ nucleus $^{88}\mathrm{Sr}$ was studied in photon-scattering experiments at electron linear accelerator ELBE with bremsstrahlung produced kinetic energies 9.0, 13.2, and 16.0 MeV. We identified 160 levels up to an excitation energy 12 By using polarized photons polarizations about 50 \ensuremath{\gamma} transitions were measured that enabled parity assignments corresponding states. In range 6--12 MeV we only one $M1$ transition; all other have $E1$...
The production of heavy neutron-rich nuclei has been investigated using cold fragmentation reactions $^{238}$U projectiles at relativistic energies. experiment performed the high-resolving-power magnetic spectrometer FRS GSI allowed to identify 45 new nuclei: $^{205}$Pt, $^{207-210}$Au, $^{211-216}$Hg, $^{213-217}$Tl, $^{215-220}$Pb, $^{219-224}$Bi, $^{221-227}$Po, $^{224-229}$At, $^{229-231}$Rn and $^{233}$Fr. cross sections these were also determined used benchmark reaction codes that...
Dipole-strength distributions in the nuclides $^{98}\mathrm{Mo}$ and $^{100}\mathrm{Mo}$ up to neutron-separation energies have been studied photon-scattering experiments at bremsstrahlung facility of Forschungszentrum Dresden-Rossendorf. To determine dipole-strength neutron-emission thresholds, statistical methods were developed for analysis measured spectra. The spectra scattered photons corrected detector response atomic background by simulations using code GEANT3. Simulations...
Photoabsorption cross sections ${\ensuremath{\sigma}}_{\ensuremath{\gamma}}$ up to the neutron-separation energy ${S}_{n}$ were measured for stable even-mass isotopes $^{92\ensuremath{-}100}\mathrm{Mo}$ in photon-scattering experiments. The data analyzed a novel way by taking into account intensity of unresolved levels at high excitation and level density. Simulations $\ensuremath{\gamma}$-ray cascades performed estimate distribution inelastic transitions low-lying and, hence, deduce...
The electromagnetic dipole strength of the nucleus ${}^{136}$Ba has been investigated. Two measurements were performed with electron energies 7.0 and 11.4 MeV at bremsstrahlung facility ELBE accelerator Helmholtz-Zentrum Dresden-Rossendorf. Photon scattering experiments on same have high-intensity gamma-ray source (HI$\ensuremath{\gamma}$S) Triangle Universities Nuclear Laboratory between 4.7 9.3 MeV. geant4 code used to determine detector response non-nuclear scattered events. Thus it is...
We measured the 7Be(p,gamma)8B cross section from E(c.m.) = 186 to 1200 keV, with a statistical-plus-systematic precision per point of better than +/-5%. All important systematic errors were including 8B backscattering losses. obtain S17(0) 22.3+/-0.7(expt)+/-0.5(theor) eV b our data at E(c.m.)< or =300 keV and theory Descouvemont Baye.
A new experimental approach is introduced to investigate the relaxation of nuclear deformation degrees freedom. Highly excited fissioning systems with compact shapes and low angular momenta are produced in peripheral relativistic heavy-ion collisions. Both fission fragments identified atomic number. Fission cross sections fission-fragment element distributions determined as a function element. From comparison these observables nuclear-reaction code value for transient time deduced.
The $\ensuremath{\gamma}$-ray strength function is an important input quantity for the determination of photoreaction rate and neutron capture astrophysics as well nuclear technologies. To test model predictions, photoabsorption cross section $^{139}\mathrm{La}$ up to neutron-separation energy was measured using bremsstrahlung produced at electron accelerator ELBE Forschungszentrum Dresden-Rossendorf with beam $11.5$ MeV kinetic energy. experimental data were analyzed by applying Monte Carlo...