A5070004783- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Rare-earth and actinide compounds
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Inorganic Fluorides and Related Compounds
- Cold Atom Physics and Bose-Einstein Condensates
- Particle physics theoretical and experimental studies
- High-pressure geophysics and materials
- X-ray Spectroscopy and Fluorescence Analysis
- Laser Design and Applications
- Crystallography and Radiation Phenomena
- Laser-Matter Interactions and Applications
- Astro and Planetary Science
- Isotope Analysis in Ecology
- Advanced Software Engineering Methodologies
- Nuclear reactor physics and engineering
University Medical Center of the Johannes Gutenberg University Mainz
2025
Johannes Gutenberg University Mainz
2000-2025
University of Siegen
2024
Lawrence Livermore National Laboratory
1990-2024
Eindhoven University of Technology
2003
Institut de Physique
1978-1996
Université Libre de Bruxelles
1996
Oak Ridge National Laboratory
1995
Lawrence Livermore National Security
1994-1995
University of Regensburg
1981
A coordinate-space method is developed to solve the three-dimensional time-dependent Hartree-Fock equations. It applied study of $^{16}\mathrm{O}$ + collisions at ${E}_{\mathrm{lab}}=105$ MeV for incident angular momenta from O $40\ensuremath{\hbar}$. We find fusion $L=13\ensuremath{\hbar} \mathrm{through} 27\ensuremath{\hbar}$ and highly inelastic scattering $L\ensuremath{\le}12\ensuremath{\hbar}$.NUCLEAR REACTIONS $^{16}\mathrm{O}(^{16}\mathrm{O},x)$ in approximation. Fusion strongly...
It is suggested that very hot and dense nuclear matter may be formed in a transient state "head-on" collisions of energetic heavy ions with medium nuclei. A study the particles emitted these should give clues as to nature matter. Some simple models regarding effects meson ${N}^{*}$ production on properties are discussed.
Photoneutron yield measurements have been made for terbium, tantalum, and gold with good energy resolution from threshold up to 25 Mev. Neutron-production cross sections were obtained directly the experimental points without smoothing raw data. Corrections multiple production of neutrons above ($\ensuremath{\gamma}, 2n$) thresholds. The giant resonances terbium tantalum found be split into two as predicted by Okamoto Danos. all three nuclei fitted superposition Lorentz shape resonance lines....
We consider the effect on binding energies of $_{\ensuremath{\Lambda}}^{4}\mathrm{He}\ensuremath{-}_{\ensuremath{\Lambda}}^{4}\mathrm{H}$ inclusion admixing $\ensuremath{\Sigma}$ particle, based a $\ensuremath{\Lambda}\ensuremath{-}N$ potential derived from $_{\ensuremath{\Lambda}}^{5}\mathrm{He}$. This mixing explains discrepancy in Coulomb energy and leads to consistent set parameters.
A method for performing basis free self-consistent calculations directly in coordinate space is applied to study rotating nuclei. The uniquely suited accurately describe extremely deformed nuclei such as may be found near scission. Because of technical complications, the present limited light cranked about a single fixed axis, and pairing spin-orbit effects are not included. However these limitations significant at high values angular momentum which we interested, believe that our...
Canavan disease (CD) is a rare autosomal recessive leukodystrophy caused by biallelic pathogenic variants in the ASPA gene. CD characterized developmental delay, macrocephaly, and abnormal muscle tone. The biochemical diagnosis confirmed increased N-acetylaspartic acid levels. phenotypic presentation varies, with 85-90% of individuals exhibiting severe, typical form, while 10-15% present milder, atypical form. Here we report on five patients clinical biochemically proven whom second variant...
A very crude model is used to estimate multiple $\ensuremath{\Lambda}$ production in heavy-ion scattering at high energies. We conclude that hyperfragments containing many $\ensuremath{\Lambda}'\mathrm{s}$ could be formed with reasonable cross sections (superstrange nuclei).
The goal of sample-based testing variant-rich software systems is to reduce usually very large configuration spaces significantly smaller, yet still representative subsets configurations be tested for quality assurance. Recent sampling techniques and tools are restricted finite-dimensional, Boolean specified by a feature model. However, in many modern application domains like cloud computing cyber-physical systems, customers not only decide about the presence or absence features but also...
Optical measurements of a clean, $2\ensuremath{-}\ensuremath{\mu}\mathrm{C}$ ${}^{233}\mathrm{U}$ sample were made to verify light emission from gamma ray decay the first excited nuclear level in ${}^{229}\mathrm{Th}$. The results showed that observed earlier studies was likely be caused by alpha-particle induced fluorescence air. In vacuo, no discernable. ${}^{229}\mathrm{Th}$ system, therefore, does not appear provide access for studying atomic-nuclear interactions suggested previous measurements.
Absolute differential cross sections for the reaction ep-->epgamma have been measured at a four-momentum transfer with virtuality Q2 = 0.33 GeV2 and polarization epsilon 0.62 in range 33.6 to 111.5 MeV/c momentum of outgoing photon photon-proton center mass frame. The experiment has performed high-resolution spectrometers Mainz Microtron MAMI. From angular distributions, two structure functions which are linear combination generalized polarizabilities determined first time.
Using parity projection and the generator-coordinate method we investigate left-right-asymmetric softness of superdeformed minimum $^{194}\mathrm{Pb}$. The collective wave functions exhibit large octupole dipsersions. Our calculation suggests that above ground-state band there should exist a negative-parity similar quadrupole deformation with an excitation energy close to 2 MeV.
The binding energies of the $s$-shell hypernuclei ($_{\ensuremath{\Lambda}}\mathrm{H}^{4}$, $_{\ensuremath{\Lambda}}\mathrm{He}^{5}$, and $_{\ensuremath{\Lambda}\ensuremath{\Lambda}}\mathrm{He}^{6}$) have been calculated in Hartree-Fock model, using Gaussian particle-particle potentials. Parameters $\ensuremath{\Lambda}\ensuremath{-}N$ interaction were determined from experimental energies. These numerical results agree qualitatively with those other calculations also scattering data, if...
The total photoneutron yield curves for Sn, I, La, Ce, Sm, Tb, Ho, Er, Yb, Ta, Au, and Pb have been measured x-ray energies from 7 to 40 Mev with about one percent statistical uncertainty. Penfold-Leiss matrix was used convert these integrated neutron cross sections directly without smoothing the original activation curves. derived integral were corrected multiple emission above ($\ensuremath{\gamma}, 2n$) threshold using model. widths found giant resonances closed-shell nuclei decreased 5...
Two-dimensional and three-dimensional time-dependent Hartree-Fock calculations have been performed over a wide range of angular momenta for $^{16}\mathrm{O}$ + at ${E}_{\mathrm{lab}}=105$ MeV $^{40}\mathrm{Ca}$ ${E}_{\mathrm{lab}}=192$ MeV. In all the two-dimensional it is assumed that nuclear system axially-symmetric about line joining mass centers colliding ions. Two very different two-dimensional, models are considered. (a) first case, after two ions interpenetrate moment inertia attains...
Time-dependent Hartree-Fock calculations are carried out for the systems $^{16}\mathrm{O}$ + $^{40}\mathrm{Ca}$ and $^{28}\mathrm{Si}$ $^{28}\mathrm{Si}$. Cross sections formation of $^{56}\mathrm{Ni}$ qualitatively similar in both cases, although there exist significant quantitative differences which reflect importance entrance channel. Both exhibit an angular momentum window fusion. The results compared with currently available experimental data.NUCLEAR REACTIONS...