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Träfflista för sökning "WFRF:(Hansen P. R.) srt2:(1985-1989)"

Sökning: WFRF:(Hansen P. R.) > (1985-1989)

  • Resultat 1-3 av 3
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1.
  • Bjornstad, T., et al. (författare)
  • Study of the Giant Gamow-Teller Resonance in Nuclear Beta-Decay - the Case of Ar-32
  • 1985
  • Ingår i: Nuclear Physics A. - : Elsevier BV. - 0375-9474. ; 443:2, s. 283-301
  • Tidskriftsartikel (refereegranskat)abstract
    • Delayed proton and gamma emissions following the β-decay of 32Ar have been studied. The half-life of 32Ar is 98 ± 2 ms, and the T = 2 analogue state in 32Cl lies at the excitation energy 5036 ± 12 keV. From the intensity of the feeding to this state the proton intensities can be converted to an absolute scale leading to a total proton branching ratio of (43 ± 3)%. From proton-gamma coincidence measurements it emerges that (1.9 ± 0.2)% of the protons lead to the first-excited state in 31S. A level scheme up to 8.75 MeV excitation in 32Cl has been constructed and the Gamow-Teller strength function has been deduced. The result is a renormalization of the axial-vector strength to (49 ± 5)% of the free-nucleon value.
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2.
  • Axelsson, H., et al. (författare)
  • Candidates for Electron-Neutrino Mass Measurements - the Case of Kr-81
  • 1988
  • Ingår i: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 210:1-2, s. 249-252
  • Tidskriftsartikel (refereegranskat)abstract
    • The nuclear data of the known candidates for neutrino mass determination by resonant electron-capture beta decay are reviewed. New results are presented for the isotope 81Kr, where the transition to the 276 keV state has been found to have QEC=4.7±0.5 keV and a branching ratio of (3.0±0.2)×10−3
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3.
  • Nyholm, R., et al. (författare)
  • Submicrometer-resolution photoelectron-spectroscopy at MAX Lab
  • 1989
  • Ingår i: Review of Scientific Instruments. - : AIP Publishing. - 0034-6748 .- 1089-7623. ; 60:7, s. 2168-2171
  • Tidskriftsartikel (refereegranskat)abstract
    • The design of a photoemission microprobe beamline at the MAX laboratory is presented. The beamline will utilize the radiation from a 26 period undulator on the 550-MeV MAX storage ring. The beamline will be capable of providing about 1010 photons/s of monochromatized radiation (bandwidth better than 0.25 eV) in the energy range of 20 to 150 eV focused into a submicrometer focal spot. It will be used for scanning photoemission experiments with a lateral resolution better than 1 μm. The optical system is comprised of a plane-grating monochromator with a Kirkpatrick-Baez objective and a specially designed ellipsoidal focusing mirror.
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