Filters
Results 1 - 10 of 782
Results 1 - 10 of 782.
Search took: 0.022 seconds
Sort by: date | relevance |
AbstractAbstract
[en] The search for the beta-delayed fission in neutron-rich nuclei has been performed at the IRIS mass-separator. The delayed fission has not been observed: The limits of probabilities for 228, 230, 232 Fr and 232 Ac precursors have been obtained. The new isotopes 232 Fr, 233, 234 Ra have been identified. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
ACTINIDE NUCLEI, ACTINIUM ISOTOPES, BETA DECAY, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DECAY, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, HEAVY NUCLEI, INFORMATION, ISOTOPES, MINUTES LIVING RADIOISOTOPES, NUCLEAR DECAY, NUCLEAR REACTIONS, NUCLEI, NUMERICAL DATA, ODD-ODD NUCLEI, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] For a quantum field theory with interacting scalar fields treated in light-cone quantisation (LCQ) it is shown that the vacuum of the theory is always the perturbative vacuum. The fields can be split up into classical constant fields, determined by minima of the effective action, and quantum fields. The former ones replace the nontrivial vacuum expectation values of the conventionally quantised theory. When spontaneous symmetry breaking occurs, the classical fields are only determined up to symmetry transformations. This degeneracy corresponds to the degeneracy of the vacuum in the conventional approach. The effective actions of the conventional theory and LCQ are identical. Light-cone charges obey the canonical commutation relations with the fields and the canonical charge algebra relations. Ward identities and the appearance of Goldstone Bosons accompanying spontaneous symmetry breaking can be derived in analogy to the conventional case. (orig.)
Primary Subject
Source
CONTRACT BMFT 0234REB0
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A π-π and K-anti K coupled channel analysis of the isoscalar spin zero mesons is presented in the framework of the separable potential formalism. The π-π and K-anti K interactions have a very short range character. The f0(975) meson can be treated as a bound Kanti K state; its root mean square radius is of the order of 1 fm. The f0(975) coupling constant to the Kanti K system is rather large. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
ANTIKAONS, BOUND STATE, CENTRAL POTENTIAL, COUPLED CHANNEL THEORY, COUPLING CONSTANTS, EFFECTIVE MASS, ENERGY DEPENDENCE, F0-975 MESONS, GEV RANGE 01-10, INTERACTION RANGE, KAON-KAON INTERACTIONS, MEV RANGE 100-1000, PARTICLE MODELS, PARTICLE RADII, PARTICLE STRUCTURE, PHASE SHIFT, PION-PION INTERACTIONS, PIONS, POTENTIAL SCATTERING, S WAVES, SCALAR MESONS, THEORETICAL DATA, WAVE FUNCTIONS
ANTIMATTER, ANTIPARTICLES, BOSONS, DATA, DISTANCE, ELASTIC SCATTERING, ELEMENTARY PARTICLES, ENERGY RANGE, FUNCTIONS, GEV RANGE, HADRON-HADRON INTERACTIONS, HADRONS, INFORMATION, INTERACTIONS, KAONS, MASS, MATHEMATICAL MODELS, MATTER, MESON-MESON INTERACTIONS, MESONS, MEV RANGE, NUMERICAL DATA, PARTIAL WAVES, PARTICLE INTERACTIONS, PARTICLE PROPERTIES, POTENTIALS, PSEUDOSCALAR MESONS, SCATTERING, STRANGE MESONS, STRANGE PARTICLES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A level scheme has been established for 3794Rb57 based on studies at the fission-product separator JOSEF of γ-γ coincidences following the β-decay of 94Kr. For the 190.7 keV level a half-life of 2.5(8) ns has been determined through the centroid-shift method. The major β-decay branch of 94Kr proceeds with log ft=3.7 into the 988.4 keV state in 94Rb. This transition must be of the 0+→1+ GT type involving the transition νg7/2→πg9/2. IBFFM calculations have been performed for 94Rb, starting from the parametrization used in the previous IBM investigations for the isotope 93Rb and the isotone 96Y. A theoretical interpretation of the low-lying levels including propositions for the spins is given in a comparison to the available data. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
BETA-MINUS DECAY, BRANCHING RATIO, DE-EXCITATION, E2-TRANSITIONS, ENERGY SPECTRA, EXCITED STATES, EXPERIMENTAL DATA, FT VALUE, GAMMA CASCADES, GAMMA SPECTRA, GAMOW-TELLER RULES, HALF-LIFE, INTERACTING BOSON MODEL, KRYPTON 94, LIMITING VALUES, M1-TRANSITIONS, MILLISEC LIVING RADIOISOTOPES, NEUTRON-RICH ISOTOPES, NUCLEAR STRUCTURE, PARITY, RUBIDIUM 94, SPIN, STRENGTH FUNCTIONS
ANGULAR MOMENTUM, BETA DECAY, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, DATA, DECAY, ENERGY LEVELS, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, FUNCTIONS, INFORMATION, INTERMEDIATE MASS NUCLEI, ISOTOPES, KRYPTON ISOTOPES, MATHEMATICAL MODELS, MULTIPOLE TRANSITIONS, NUCLEAR CASCADES, NUCLEAR DECAY, NUCLEAR MODELS, NUCLEI, NUMERICAL DATA, ODD-ODD NUCLEI, PARTICLE PROPERTIES, RADIOISOTOPES, RUBIDIUM ISOTOPES, SECONDS LIVING RADIOISOTOPES, SHELL MODELS, SPECTRA
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Lifetimes of excited states in 164Hf were measured using the Doppler-shift recoil-distance method. Gamma-gamma coincidences at eleven target-stopper distances were measured using the twelve Compton-suppressed Ge-detectors of the OSIRIS spectrometer. From the coincidence spectra the intensities of the Doppler-shifted and unshifted γ-lines were determined. The quadrupole moments Qt of transitions within the rotational bands derived from the lifetimes are constant within the experimental uncertainties up to the 18+ state. The Qt value for the transition between the ground- and the neutron i213/2 band (s-band) which is strongly reduced compared to the values of the in-band transitions is used to deduce a band interaction energy of 34 keV≤V≤57 keV. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The T-violation effects in neutron-deuteron scattering caused by T-noninvariant P-even nucleon-nucleon interaction are discussed. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Country of publication
AXIAL-VECTOR CURRENTS, BORN APPROXIMATION, DEUTERIUM, DEUTERIUM TARGET, ELASTIC SCATTERING, ENERGY DEPENDENCE, FEYNMAN DIAGRAM, INTEGRAL CROSS SECTIONS, LAGRANGIAN FIELD THEORY, NEUTRON REACTIONS, NEUTRONS, NUCLEON-NUCLEON INTERACTIONS, POLARIZED BEAMS, POLARIZED TARGETS, SPIN ORIENTATION, SYMMETRY BREAKING, T INVARIANCE, VECTOR FIELDS
ALGEBRAIC CURRENTS, BARYON REACTIONS, BARYON-BARYON INTERACTIONS, BARYONS, BEAMS, CROSS SECTIONS, CURRENTS, DIAGRAMS, ELEMENTARY PARTICLES, FERMIONS, FIELD THEORIES, HADRON REACTIONS, HADRON-HADRON INTERACTIONS, HADRONS, HYDROGEN ISOTOPES, INFORMATION, INTERACTIONS, INVARIANCE PRINCIPLES, ISOTOPES, LIGHT NUCLEI, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, ODD-ODD NUCLEI, ORIENTATION, PARTICLE INTERACTIONS, QUANTUM FIELD THEORY, SCATTERING, STABLE ISOTOPES, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The decays of 113,114,115g,115m,116Pd have been studied with an emphasis on the determinations of total decay energies and absolute γ-ray intensities. The experiments also provided improved data on these quantities for the decays of 114,115g,115m,116mAg. A search for isomeric transitions using a high resolution electron detector resulted in the identification of isomeric E3 transitions in 115Pd and 113,115,116,117Ag. The isomeric branching was determined in all cases. The Qβ-values of 113-116Pd and 113-116Ag have been measured using a βγ-coincidence method. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
BETA-MINUS DECAY, BRANCHING RATIO, CADMIUM 114, CADMIUM 115, CADMIUM 116, CADMIUM 117, CADMIUM ISOTOPES, DE-EXCITATION, DELAYED GAMMA RADIATION, E3-TRANSITIONS, ELECTRON SPECTRA, ENERGY SPECTRA, EXCITED STATES, EXPERIMENTAL DATA, GAMMA SPECTRA, ISOMERIC NUCLEI, ISOMERIC TRANSITIONS, K CONVERSION, L CONVERSION, M CONVERSION, MULTIPOLARITY, NEUTRON-RICH ISOTOPES, PALLADIUM 113, PALLADIUM 114, PALLADIUM 115, PALLADIUM 116, PALLADIUM ISOTOPES, Q-VALUE, SILVER 113, SILVER 114, SILVER 115, SILVER 116, SILVER 117, SILVER ISOTOPES
BETA DECAY, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CONVERSION, DATA, DAYS LIVING RADIOISOTOPES, DECAY, ELECTROMAGNETIC RADIATION, ENERGY, ENERGY LEVELS, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, GAMMA RADIATION, HOURS LIVING RADIOISOTOPES, INFORMATION, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION, IONIZING RADIATIONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, MINUTES LIVING RADIOISOTOPES, MULTIPOLE TRANSITIONS, NUCLEAR DECAY, NUCLEI, NUMERICAL DATA, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIATIONS, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTRA, STABLE ISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] High spin states of 175,176Pt have been populated in 144Sm(35Cl, pxn) reactions at beam energies of 175-185 MeV. In-beam γ-ray spectroscopic techniques using the ESSA30 spectrometer array were adopted. Levels up to spin 26 in 176Pt and tentatively up to spin 45/2 in 175Pt have been identified. The data are interpreted within the framework of Cranked Shell model calculations using the deformed Woods-Saxon potential and including monopole pairing. (orig.)
Primary Subject
Source
CONTRACT ESSA30 ST2J-0205
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
ANGULAR CORRELATION, CHLORINE 35 REACTIONS, CRANKING MODEL, DE-EXCITATION, E1-TRANSITIONS, E2-TRANSITIONS, ENERGY SPECTRA, EXPERIMENTAL DATA, GAMMA CASCADES, GAMMA RADIATION, GAMMA SPECTRA, HEAVY ION FUSION REACTIONS, HIGH SPIN STATES, MEV RANGE 100-1000, MOMENT OF INERTIA, NEUTRON-DEFICIENT ISOTOPES, NEUTRONS, NUCLEAR DEFORMATION, NUCLEAR STRUCTURE, PAIRING INTERACTIONS, PARITY, PHOTONS, PLATINUM 175, PLATINUM 176, PROTONS, ROTATIONAL STATES, SAMARIUM 144 TARGET, SHELL MODELS, SPIN, WOODS-SAXON POTENTIAL, YRAST STATES
ALPHA DECAY RADIOISOTOPES, ANGULAR MOMENTUM, BARYONS, BETA DECAY RADIOISOTOPES, BOSONS, CATIONS, CHARGED PARTICLES, CORRELATIONS, DATA, DEFORMATION, ELECTROMAGNETIC RADIATION, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, EXCITED STATES, FERMIONS, HADRONS, HEAVY ION REACTIONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INFORMATION, INTERACTIONS, INTERMEDIATE MASS NUCLEI, IONIZING RADIATIONS, IONS, ISOTOPES, MASSLESS PARTICLES, MATHEMATICAL MODELS, MEV RANGE, MULTIPOLE TRANSITIONS, NUCLEAR CASCADES, NUCLEAR MODELS, NUCLEAR POTENTIAL, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, NUCLEOSYNTHESIS, NUMERICAL DATA, PARTICLE PROPERTIES, PLATINUM ISOTOPES, POTENTIALS, RADIATIONS, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTRA, SYNTHESIS, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] A phenomenological method is proposed to select possible Quark matter forming events in ultra-relativistic nucleus-nucleus interactions. We compare the released photonic and hadronic energies from a Quark matter forming event and from a normal Hadronic event and derive a relation, which may be used in an event-by-event analysis to differentiate the two phases. We determine thus two regions of QCD deconfinement. We also discuss the hadronic, photonic energy and multiplicity contents and the < PT> of several exotic cosmic ray events at ultra high energies. On the basis of the phenomenological model, we suggest that the 'Centauro' type are Quark matter events near the projectile fragmentation region with very large baryochemical potential, μb. The 'Anti-Centauro' type events are created by vacuum excitation in the central region with near zero μb. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Country of publication
ANNIHILATION, BAG MODEL, CHARGED PARTICLES, COLOR MODEL, COSMIC PHOTONS, DEEP INELASTIC HEAVY ION REACT, ENERGY SPECTRA, EXCITATION, GAMMA SPECTRA, GLUON MODEL, GOLD 197 TARGET, HADRONS, HEAVY ION REACTIONS, LIMITING FRAGMENTATION, MULTIPLE PRODUCTION, MULTIPLICITY, NUCLEAR MATTER, NUCLEAR REACTION KINETICS, OXYGEN 16 REACTIONS, PHASE TRANSFORMATIONS, QUANTUM CHROMODYNAMICS, QUARK MATTER, QUARK-ANTIQUARK INTERACTIONS, RELATIVISTIC PLASMA, RELATIVISTIC RANGE, SECONDARY COSMIC RADIATION, TEV RANGE 01-10, TEV RANGE 10-100, TRANSVERSE MOMENTUM, VACUUM STATES
BOSONS, COMPOSITE MODELS, COSMIC RADIATION, ELEMENTARY PARTICLES, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EXTENDED PARTICLE MODEL, FIELD THEORIES, HYPOTHESIS, INTERACTIONS, IONIZING RADIATIONS, KINETICS, LINEAR MOMENTUM, MASSLESS PARTICLES, MATHEMATICAL MODELS, MATTER, NUCLEAR REACTIONS, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PRODUCTION, PHOTONS, PLASMA, QUANTUM FIELD THEORY, QUARK MODEL, RADIATIONS, REACTION KINETICS, SPECTRA, TARGETS, TEV RANGE
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The 146Nd(α,n) reaction combined with conventional in-beam spectroscopic methods has been used to study low-lying levels in 149Sm. Several new levels and γ-ray transitions have been placed to the 149Sm level scheme. Main features of levels below 1 MeV in 149Sm have been reproduced in a quasiparticle-rotor model calculation. (orig.)
Primary Subject
Record Type
Journal Article
Literature Type
Numerical Data
Journal
Country of publication
ALPHA REACTIONS, ANGULAR DISTRIBUTION, BRANCHING RATIO, DE-EXCITATION, E1-TRANSITIONS, E2-TRANSITIONS, ELECTRON SPECTRA, ENERGY DEPENDENCE, ENERGY SPECTRA, EXCITATION FUNCTIONS, EXPERIMENTAL DATA, GAMMA CASCADES, GAMMA SPECTRA, HIGH SPIN STATES, K CONVERSION, M1-TRANSITIONS, M2-TRANSITIONS, MEV RANGE 10-100, MIXING RATIO, MULTI-NUCLEON TRANSFER REACTIO, MULTIPOLARITY, NEODYMIUM 146 TARGET, NEUTRONS, NUCLEAR STRUCTURE, PARITY, PARTICLE-CORE COUPLING MODEL, PHOTONS, ROTATIONAL STATES, SAMARIUM 149, SPIN, STRENGTH FUNCTIONS, THREE-NUCLEON TRANSFER REACTIO
ANGULAR MOMENTUM, BARYONS, BOSONS, CONVERSION, DATA, DECAY, DIRECT REACTIONS, DISTRIBUTION, ELEMENTARY PARTICLES, ENERGY LEVELS, ENERGY RANGE, ENERGY-LEVEL TRANSITIONS, EVEN-ODD NUCLEI, EXCITED STATES, FERMIONS, FUNCTIONS, HADRONS, INFORMATION, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION, ISOTOPES, MASSLESS PARTICLES, MATHEMATICAL MODELS, MEV RANGE, MULTIPOLE TRANSITIONS, NUCLEAR CASCADES, NUCLEAR DECAY, NUCLEAR MODELS, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, NUMERICAL DATA, PARTICLE PROPERTIES, RARE EARTH NUCLEI, SAMARIUM ISOTOPES, SPECTRA, STABLE ISOTOPES, TARGETS, TRANSFER REACTIONS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |