0000000001314922

AUTHOR

E. Hanelt

showing 6 related works from this author

Low-energy fission investigated in reactions of 750 AMeV 238U-ions with Pb and Be targets

1996

Charge distributions of fragments from low energy nuclear fission are investigated in reactions of highly fissile238U projectiles at relativistic energies (750 A·MeV) with a heavy (Pb) and a light (Be) target. The fully stripped fission fragments are separated by the Fragment Separator (FRS). Their high kinetic energies in the laboratory system allow the identification of all atomic numbers by using Multiple-Sampling Ionization Chambers (MUSIC). The elemental distributions of fragments observed at larger magnetic rigidities than the238U projectiles show asymmetric break-up and odd-even effects. They indicate a low energy fission process, induced mainly by dissociation in the electro-magneti…

PhysicsCold fissionNuclear and High Energy PhysicsCluster decay010308 nuclear & particles physicsFissionNuclear TheoryKinetic energy01 natural sciences7. Clean energyDissociation (chemistry)Effective nuclear chargeIonNuclear physicsLow energyNuclear fissionIonization0103 physical sciencesNuclear fusionAtomic physicsNuclear Experiment010306 general physicsZeitschrift für Physik A Hadrons and nuclei
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Few-neutron removal from238U at relativistic energies

1995

As part of a comprehensive study of uranium fragmentation at relativistic energies at the GSI projectile fragment separator, FRS, inclusive neutron-removal cross sections have been measured for severalxn channels at projectile energies of 600 and 950A MeV using targets of Al, Cu and Pb. The variation of the experimental cross sections with target nuclear charge is used to disentangle nuclear and electromagnetic contributions. The electromagnetic cross sections agree surprisingly well with a simple harmonic oscillator calculation of giant dipole resonances based on measured photonuclear cross sections and do not require an extra enhancement of the two-phonon giant dipole excitation as conclu…

PhysicsNuclear and High Energy PhysicsProjectileNuclear Theorychemistry.chemical_elementSimple harmonic motionUraniumEffective nuclear chargeNuclear physicsDipoleFragmentation (mass spectrometry)chemistryNuclear fusionNeutronAtomic physicsNuclear ExperimentNuclear PhysicsZeitschrift für Physik A Hadrons and Nuclei
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First spatial isotopic separation of relativistic uranium projectile fragments

1994

Abstract Spatial isotopic separation of relativistic uranium projectile fragments has been achieved for the first time. The fragments were produced in peripheral nuclear collisions and spatially separated in-flight with the fragment separator FRS at GSI. A two-fold magnetic-rigidity analysis was applied exploiting the atomic energy loss in specially shaped matter placed in the dispersive central focal plane. Systematic investigations with relativistic projectiles ranging from oxygen up to uranium demonstrate that the FRS is a universal and powerful facility for the production and in-flight separation of monoisotopic, exotic secondary beams of all elements up to Z = 92. This achievement has …

Nuclear and High Energy PhysicsTheoryofComputation_COMPUTATIONBYABSTRACTDEVICES010308 nuclear & particles physicsChemistryProjectileNuclear TheoryTheoryofComputation_GENERALSeparator (oil production)chemistry.chemical_element[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]UraniumAccelerators and Storage RingsComputingMethodologies_ARTIFICIALINTELLIGENCE01 natural sciencesNuclear physicsComputingMethodologies_PATTERNRECOGNITIONCardinal point0103 physical sciencesMonoisotopic massAtomic physicsNuclear Experiment010306 general physicsInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Excited states in neutron deficient even-even thorium isotopes (218?A?222)

1985

The nuclei218, 220, 222Th were investigated by conversion electron andγ-ray spectroscopy after compound nucleus reactions of14N with209Bi and16, 18O with208Pb. The intenseγ-background from fission was suppressed by spectroscopy of conversion electrons andγ-rays in coincidence with the evaporation residues or theirα-decay. Level schemes were determined for218Th up toIπ=10+ and for220Th and222Th up toIπ=15−. The observed structure of218Th may be explained in the spherical shell model with residual interaction by two neutron excitation. ForN≧130 completely different level schemes are observed showing very intense, collective electric dipole transitions (B(E1)−10−2 W.u.) with energies of typica…

PhysicsNuclear and High Energy PhysicsFissionExcited stateNeutronElectric dipole transitionAtomic physicsGround stateSpectroscopyIsotopes of thoriumExcitationZeitschrift f�r Physik A Atoms and Nuclei
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"Table 2" of "Few neutron removal from U-238 at relativistic energies"

1997

Uranium fragmentation.

inorganic chemicalsU238 CU --> U236 XU238 PB --> U235 XU238 CU --> U235 XU238 PB --> U236 XU238 CU --> U234 XU238 PB --> U234 XIntegrated Cross Sectiontechnology industry and agricultureCross SectionU238 AL --> U236 XSIGcomplex mixturesU238 AL --> U237 XU238 PB --> U237 XU238 CU --> U237 XNUCLEUS NUCLEUS --> U234 XInclusiveU238 AL --> U234 XU238 AL --> U235 XNUCLEUS NUCLEUS --> U237 XNUCLEUS NUCLEUS --> U236 XNUCLEUS NUCLEUS --> U235 X
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"Table 1" of "Few neutron removal from U-238 at relativistic energies"

1997

Uranium fragmentation.

inorganic chemicalsU238 CU --> U236 XU238 CU --> U235 XU238 CU --> U234 XCross Sectioncomplex mixturesU238 CU --> U237 XNUCLEUS NUCLEUS --> U234 XInclusiveNUCLEUS NUCLEUS --> U233 XNUCLEUS NUCLEUS --> U237 XNUCLEUS NUCLEUS --> U236 XNUCLEUS NUCLEUS --> U235 XU238 PB --> U235 XU238 PB --> U236 XU238 PB --> U233 XU238 PB --> U234 XIntegrated Cross Sectiontechnology industry and agricultureU238 AL --> U236 XSIGU238 AL --> U237 XU238 PB --> U237 XU238 AL --> U233 XU238 AL --> U234 XU238 AL --> U235 X
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