0000000000174508

AUTHOR

A. Huebner

showing 2 related works from this author

TASISpec—A highly efficient multi-coincidence spectrometer for nuclear structure investigations of the heaviest nuclei

2010

TASISpec (TASCA in Small Image mode Spectroscopy) combines composite Ge- and Si-detectors for a new detector setup aimed towards multi-coincidence gamma -ray, X-ray, conversion electron, fission fragment, and a-particle spectroscopy of the heaviest nuclei. It exploits the TASCA separator's unique small image focal mode, i.e. the fact that evaporation residues produced in fusion-evaporation reactions can be focused into an area of less than 3 cm in diameter. This provides the possibility to pack detectors in very close geometry, resulting in an unprecedented detection efficiency of radioactive decays in prompt and delayed coincidence with implanted nuclei. Crown Copyright (C) 2010 Publis…

Recoil separatorsNuclear and High Energy PhysicsalphaFissionElectronandAccelerator Physics and Instrumentationconversion electronNuclear physicsImage modespectroscopy at recoil separatorsgamma-rayNuclear ExperimentSpectroscopyClover Ge detectorInstrumentationSpontaneous fissionPhysicsdetectorSpectrometerDetectorGamma rayDecay tagging spectrometerCluster Ge detectorSi stripAtomic physicsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Production and Decay of Element 114: High Cross Sections and the New NucleusHs277

2010

The fusion-evaporation reaction Pu-244(Ca-48, 3-4n)(288,289)114 was studied at the new gas-filled recoil separator TASCA. Thirteen correlated decay chains were observed and assigned to the production and decay of (288, 289)114. At a compound nucleus excitation energy of E* = 39.8-43.9 MeV, the 4n evaporation channel cross section was 9.8(-3.1)(+3.9) pb. At E* = 36.1-39.5 MeV, that of the 3n evaporation channel was 8.0-(+7.4)(4.5) pb. In one of the 3n evaporation channel decay chains, a previously unobserved alpha branch in (281)Ds was observed ( probability to be of random origin from background: 0.1%). This alpha decay populated the new nucleus (277)Hs, which decayed by spontaneous fission…

Nuclear reactionNuclear physicsCluster decayIsotopeFissionGeneral Physics and AstronomyDecay chainAlpha decayAtomic physicsRadioactive decaySpontaneous fissionPhysical Review Letters
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