Refine
Year of publication
Document Type
- Preprint (666)
- Article (454)
- Conference Proceeding (8)
- Working Paper (8)
- Doctoral Thesis (3)
- Book (1)
- Part of a Book (1)
Has Fulltext
- yes (1141)
Is part of the Bibliography
- no (1141)
Keywords
- Heavy Ion Experiments (20)
- Hadron-Hadron Scattering (11)
- Hadron-Hadron scattering (experiments) (11)
- LHC (9)
- Deutschland (6)
- Heavy-ion collision (6)
- Corporate Governance (5)
- Interbankenabkommen (5)
- ALICE experiment (4)
- Collective Flow (4)
- Finanzierungsstruktur (4)
- Jets (4)
- Kapitalstruktur (4)
- Quark-Gluon Plasma (4)
- breast cancer (4)
- ALICE (3)
- Großbritannien (3)
- Heavy Ions (3)
- Japan (3)
- Jets and Jet Substructure (3)
- financial system (3)
- pp collisions (3)
- Aspergillus fumigatus (2)
- Bank (2)
- Beauty production (2)
- Charm physics (2)
- Diagnostik (2)
- Experimental nuclear physics (2)
- Experimental particle physics (2)
- Frankreich (2)
- Früherkennung (2)
- Heat kernel (2)
- Heavy Quark Production (2)
- Kapitalflussrechnung (2)
- Kreditwesen (2)
- Krein space (2)
- Laplace operator on graphs (2)
- Lepton-Nucleon Scattering (experiments) (2)
- Mammakarzinom (2)
- Nachsorge (2)
- Particle Correlations and Fluctuations (2)
- Particle and resonance production (2)
- Particle correlations and fluctuations (2)
- Pb–Pb collisions (2)
- QCD (2)
- Quantum Zeno dynamics (2)
- Richtlinie (2)
- Schätzung (2)
- Single electrons (2)
- W*-dynamical system (2)
- X-Y model (2)
- brain metastases (2)
- complementarity (2)
- diagnosis (2)
- follow‑up (2)
- guideline (2)
- quantum spin systems (2)
- return to equilibrium (2)
- screening (2)
- (dis-)intermediation (1)
- 900 GeV (1)
- ADHD (1)
- ALICE detector (1)
- Anpassung (1)
- Anti-nuclei (1)
- Antifungal agents (1)
- Artendiversität (1)
- Artificial Intelligence (1)
- Aspergillosis (1)
- Atomic and Molecular Physics (1)
- BPTF (1)
- Bankensystem / Finanzsektor / Branchenentwicklung / Rentabilität / Strukturwandel / Sparkasse / Kreditgenossenschaft / Deutschland / 1970-2003 (1)
- Banking system (1)
- Betriebliche Gesundheitsförderung (1)
- Binnenmarkt (1)
- Biodiversity Data (1)
- Biomonitoring (1)
- Boosted Jets (1)
- Botanical Collections (1)
- Buchenwald (1)
- Bulgarien (1)
- Büroarbeit (1)
- CD8+ T lymphocytes (1)
- COVID-19 (1)
- CVID (1)
- Cancer detection (1)
- Carpinion (1)
- Centrality Class (1)
- Centrality Selection (1)
- Collective Flow, (1)
- Comparison with QCD (1)
- Completed suicide (1)
- Conservation (1)
- Corporate Governance / Eigentümerstruktur / Universalbank / Finanzmarkt / Mitbestimmung / Deutschland (1)
- Corporate governance (1)
- Dehntraining (1)
- Depression (1)
- Digitization (1)
- Doplicher-Haag-Roberts Axiomatik; Algebraische Quantenfeldtheorie; Superauswahlregeln und -sektoren; Quantenstatistik; Zopfgruppenstatistik (1)
- EGFL7 (1)
- Eichen-Hainbuchenwald (1)
- Electron-pion identification (1)
- Electroweak interaction (1)
- Elliptic flow (1)
- Ena/VASP proteins (1)
- Eurasian Curlew (1)
- European Society for Immunodeficiencies (ESID) (1)
- Europäische Gemeinschaften (1)
- Europäische Union (1)
- Exercise (1)
- FOS: Physical sciences (1)
- Fagus sylvatica (1)
- Femtoscopy (1)
- Fibre/foam sandwich radiator (1)
- Finanzintermediation (1)
- Finanzintermediäre (1)
- Finanzwirtschaft (1)
- Five-Konzept (1)
- Gelfand-Shilov space (1)
- German PID-NET registry (1)
- Germany (1)
- Geschichte 1980-1998 (1)
- Gewässervegetation (1)
- HBT (1)
- HSP (hereditary spastic paraplegia) (1)
- Hadamard's Three-Lines Theorem (1)
- Hadron production (1)
- Hadron-Hadron Scattering Heavy (1)
- Hadron-hadron interactions (1)
- Hainich (1)
- Hard Scattering (1)
- Heavy Ion Experiment (1)
- Heavy flavor production (1)
- Heavy flavour production (1)
- Heavy ions (1)
- Heavy-flavour decay muons (1)
- Heavy-flavour production (1)
- Heavy-ion collisions (1)
- Heisenberg algebra (1)
- Hematologic malignancies (1)
- Herbaria (1)
- High Energy Physics - Lattice (hep-lat) (1)
- High Energy Physics - Phenomenology (hep-ph) (1)
- High Energy Physics - Theory (hep-th) (1)
- Hyperfunktion ; Asymptotische Entwicklung (1)
- IL-33 (1)
- IgG substitution therapy (1)
- Immune response (1)
- Immunity (1)
- Immunology and Microbiology Section (1)
- Inclusive spectra (1)
- Infrared singularity (1)
- Intensity interferometry (1)
- Intervention (1)
- Invariant Mass Distribution (1)
- Invasive candidiasis (1)
- Ionisation energy loss (1)
- Jet Physics (1)
- Jet Substructure (1)
- KLHL11 (1)
- Kapitalmarkt (1)
- L^p bounds (1)
- L^p means (1)
- Lebensqualität (1)
- MDD (1)
- Material budget (1)
- Mid-rapidity (1)
- Minimum Bias (1)
- Monte Carlo (1)
- Multi-Parton Interactions (1)
- Multi-strange baryons (1)
- Multi-wire proportional drift chamber (1)
- Multimodal imaging (1)
- Musculoskeletal diseases (1)
- Muskuloskeletale Erkrankungen (1)
- Mycoses (1)
- N471D strumpellin knock-in mice (1)
- NURF (1)
- Neural network (1)
- Non-small-cell lung cancer (1)
- Nuclear Theory (nucl-th) (1)
- Nuclear modification factor (1)
- Numenius arquata (1)
- OD approach (1)
- Oberharz (1)
- Office work (1)
- PID prevalence (1)
- PYTHIA (1)
- Pandemic (1)
- Particle and Resonance Production (1)
- Pb–Pb (1)
- Phragmén-Lindelöf principle (1)
- Pontrjagin space (1)
- Production Cross Section (1)
- Prognostic markers (1)
- Properties of Hadrons (1)
- Proton–proton (1)
- Pseudo HE-images (1)
- Quality of life (1)
- Quantenfeldtheorie ; Konforme Feldtheorie ; Algebraische Methode (1)
- Quantum Zeno Effect (1)
- Quantum Zeno effect (1)
- Quark Deconfinement (1)
- Quark Gluon Plasma (1)
- Quark Production (1)
- Quark gluon plasma (1)
- Quarkonium (1)
- Raman spectroscopy (1)
- Rapidity Range (1)
- Relativistic heavy ion physics (1)
- Relativistic heavy-ion collisions (1)
- Research Infrastructure (1)
- Resolution Parameter (1)
- Russland (1)
- SARS-CoV2 (1)
- SF-36 (1)
- SPG8 (1)
- ST2L (1)
- Schwinger model (1)
- Securitization (1)
- Semantics (1)
- Single muons (1)
- Small-cell lung cancer (1)
- Solidago canadensis (1)
- Stillgewässer (1)
- Straßenböschungen (1)
- Straßenrandvegetation (1)
- Stretch training (1)
- Suicide attempt (1)
- Systematic Uncertainty (1)
- Südhessen (1)
- TR (1)
- Taxonomy (1)
- Time Projection Chamber (1)
- Tracking (1)
- Transition radiation detector (1)
- Transverse momentum (1)
- Trigger (1)
- Trotter's product formula (1)
- Tumour biomarkers (1)
- Upper Rhine Valley (1)
- VEGF receptor 2 internalization and signaling (1)
- Vector Boson Production (1)
- Vegetationsstruktur (1)
- WASH complex subunit 5 (1)
- Wettbewerbsstrategie (1)
- Work health promotion (1)
- X-ray powder diffraction (1)
- Xenon-based gas mixture (1)
- Yoga (1)
- aggression (1)
- alien species (1)
- anaesthesia in orthopaedics (1)
- anaesthetics (1)
- angiogenesis (1)
- anti-Zeno effect (1)
- aridity (1)
- asymptomatic (1)
- bank-based financial systems (1)
- banking system (1)
- beech forest (1)
- bioactivity (1)
- biogeographic legaciese (1)
- board of directors (1)
- capital market-based financial system (1)
- capital market-based financial systems (1)
- cisplatin (1)
- climate gradient (1)
- co-determination (1)
- complexity (1)
- convergence (1)
- convexity (1)
- coppice with standards (1)
- cytokine (1)
- dE/dx (1)
- deciduous forest (1)
- degenerate semigroup (1)
- denisovite (1)
- detector (1)
- disorder (1)
- disturbance (1)
- electron crystallography (1)
- electron diffraction tomography (1)
- endothelial cell (1)
- endothelial cells (1)
- experimental results (1)
- fMRI (1)
- fertilization (1)
- fibrous materials (1)
- financial systems (1)
- forest classification (1)
- forest functional similarity (1)
- framework-structured solids (1)
- gene expression (1)
- geriatric medicine (1)
- glioblastoma (1)
- heavy ion experiments (1)
- hematopoietic stem cell transplantation (1)
- human capital formationbank-based financial system (1)
- human natural killer cell (1)
- immunotherapy (1)
- indefinite inner product space (1)
- inorganic materials (1)
- integrin (1)
- intratumoral (1)
- lipiodol (1)
- lung cancer (1)
- mTOR (1)
- maternal care (1)
- measurement (1)
- mesenchymal stromal cells (1)
- microwave ablation (1)
- minerals (1)
- modular automorphism group (1)
- modular group (1)
- modularity (1)
- mowing (1)
- musculoskeletal disorders (1)
- nanocrystalline materials (1)
- nanoscience (1)
- nanostructure (1)
- nitrogen (1)
- nutrient availability (1)
- nutrient deprivation (1)
- oak-hornbeam forest (1)
- occupational health (1)
- operator algebra (1)
- pension system (1)
- perforin (1)
- phagocytosis (1)
- phosphorus (1)
- phylogenetic community distance (1)
- phytometer (1)
- plant productivity (1)
- ploughing (1)
- polytypism (1)
- primary immunodeficiency (PID) (1)
- prognostic scores (1)
- quality of life (1)
- quantum field theory (1)
- quark gluon plasma (1)
- registry for primary immunodeficiency (1)
- resilience (1)
- resource limitation (1)
- risk allocation (1)
- satellite telemetry (1)
- soil clay content (1)
- species diversity (1)
- spectra (1)
- sprouting angiogenesis (1)
- stretching (1)
- strumpellin (1)
- tip cell filopodia formation (1)
- tropical forests (1)
- vegetation structure (1)
- ventral striatum (1)
- von Neumann algebra (1)
- workplace health promotion (1)
- √sN N = 2.76 TeV (1)
Institute
- Physik (1051)
- Frankfurt Institute for Advanced Studies (FIAS) (954)
- Informatik (920)
- Medizin (36)
- Geowissenschaften (14)
- Mathematik (13)
- Wirtschaftswissenschaften (8)
- Biochemie und Chemie (3)
- Biodiversität und Klima Forschungszentrum (BiK-F) (3)
- Informatik und Mathematik (3)
New results are presented of the 234U neutron-induced fission cross section, obtained with high accuracy in the resonance region by means of two methods using the 235U(n,f) as reference. The recent evaluation of the 235U(n,f) obtained with SAMMY by L. C. Leal et al. (these Proceedings), based on previous n_TOF data [1], has been used to calculate the 234U(n,f) cross section through the 234U/235U ratio, being here compared with the results obtained by using the n_TOF neutron flux.
The 236U isotope plays an important role in nuclear systems, both for future and currently operating ones. The actual knowledge of the capture reaction of this isotope is satisfactory in the thermal region, but it is considered insufficient for Fast Reactor and ADS applications. For this reason the 236U(n, γ) reaction cross-section has been measured for the first time in the whole energy region from thermal energy up to 1 MeV at the n_TOF facility with two different detection systems: an array of C6D6 detectors, employing the total energy deposited method, and a FX1 total absorption calorimeter (TAC), made of 40 BaF2 crystals. The two n_TOF data sets agree with each other within the statistical uncertainty in the Resolved Resonance Region up to 800 eV, while sizable differences (up to ≃ 20%) are found relative to the current evaluated data libraries. Moreover two new resonances have been found in the n_TOF data. In the Unresolved Resonance Region up to 200 keV, the n_TOF results show a reasonable agreement with previous measurements and evaluated data.
The radiative capture cross section of 238U is very important for the developing of new reactor technologies and the safety of existing ones. Here the preliminary results of the 238U(n,γ) cross section measurement performed at n_TOF with C6D6 scintillation detectors are presented, paying particular attention to data reduction and background subtraction.
The 33S(n,α)30Si cross section measurement, using 10B(n,α) as reference, at the n_TOF Experimental Area 2 (EAR2) facility at CERN is presented. Data from 0.01 eV to 100 keV are provided and, for the first time, the cross section is measured in the range from 0.01 eV to 10 keV. These data may be used for a future evaluation of the cross section because present evaluations exhibit large discrepancies. The 33S(n,α)30Si reaction is of interest in medical physics because of its possible use as a cooperative target to boron in Neutron Capture Therapy (NCT).
The Cosmological Lithium Problem refers to the large discrepancy between the abundance of primordial 7Li predicted by the standard theory of Big Bang Nucleosynthesis and the value inferred from the so-called “Spite plateau” in halo stars. A possible explanation for this longstanding puzzle in Nuclear Astrophysics is related to the incorrect estimation of the destruction rate of 7Be, which is responsible for the production of 95% of primordial Lithium. While charged-particle induced reactions have mostly been ruled out, data on the 7Be(n,α) and 7Be(n,p) reactions are scarce or completely missing, so that a large uncertainty still affects the abundance of 7Li predicted by the standard theory of Big Bang Nucleosynthesis. Both reactions have been measured at the n_TOF facility at CERN, providing for the first time data in a wide neutron energy range.
73Ge(n, γ ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT = 30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of 73Ge produced in stars, which would explain the low isotopic abundance of 73Ge in the solar system.
he study of the resonant structures in neutron-nucleus cross-sections, and therefore of the compound-nucleus reaction mechanism, requires spectroscopic measurements to determine with high accuracy the energy of the neutron interacting with the material under study.
To this purpose, the neutron time-of-flight facility n_TOF has been operating since 2001 at CERN. Its characteristics, such as the high intensity instantaneous neutron flux, the wide energy range from thermal to few GeV, and the very good energy resolution, are perfectly suited to perform high-quality measurements of neutron-induced reaction cross sections. The precise and accurate knowledge of these cross sections plays a fundamental role in nuclear technologies, nuclear astrophysics and nuclear physics.
Two different measuring stations are available at the n_TOF facility, called EAR1 and EAR2, with different characteristics of intensity of the neutron flux and energy resolution. These experimental areas, combined with advanced detection systems lead to a great flexibility in performing challenging measurement of high precision and accuracy, and allow the investigation isotopes with very low cross sections, or available only in small quantities, or with very high specific activity.
The characteristics and performances of the two experimental areas of the n_TOF facility will be presented, together with the most important measurements performed to date and their physics case. In addition, the significant upcoming measurements will be introduced.
Neutron-induced reaction cross sections are important for a wide variety of research fields ranging from the study of nuclear level densities, nucleosynthesis to applications of nuclear technology like design, and criticality and safety assessment of existing and future nuclear reactors, radiation dosimetry, medical applications, nuclear waste transmutation, accelerator-driven systems and fuel cycle investigations. Simulations and calculations of nuclear technology applications largely rely on evaluated nuclear data libraries. The evaluations in these libraries are based both on experimental data and theoretical models. CERN’s neutron time-of-flight facility n_TOF has produced a considerable amount of experimental data since it has become fully operational with the start of its scientific measurement programme in 2001. While for a long period a single measurement station (EAR1) located at 185 m from the neutron production target was available, the construction of a second beam line at 20 m (EAR2) in 2014 has substantially increased the measurement capabilities of the facility. An outline of the experimental nuclear data activities at n_TOF will be presented.
The accurate knowledge of the neutron-induced fission cross-sections of actinides and other isotopes involved in the nuclear fuel cycle is essential for the design of advanced nuclear systems, such as Generation-IV nuclear reactors. Such experimental data can also provide the necessary feedback for the adjustment of nuclear model parameters used in the evaluation process, resulting in the further development of nuclear fission models. In the present work, the 240Pu(n,f) cross-section was measured at CERN's n_TOF facility relative to the well-known 235U(n,f) cross section, over a wide range of neutron energies, from meV to almost MeV, using the time-of-flight technique and a set-up based on Micromegas detectors. This measurement was the first experiment to be performed at n_TOF's new experimental area (EAR-2), which offers a significantly higher neutron flux compared to the already existing experimental area (EAR-1). Preliminary results as well as the experimental procedure, including a description of the facility and the data handling and analysis, are presented.