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Träfflista för sökning "WFRF:(Isaksson R) srt2:(1995-1999)"

Sökning: WFRF:(Isaksson R) > (1995-1999)

  • Resultat 1-13 av 13
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1.
  • Fissum, Kevin, et al. (författare)
  • High-resolution measurement of the 12C(γ,p)11B reaction to excited states for Eγ=50–70MeV
  • 1998
  • Ingår i: Physical Review C: covering nuclear physics. - 2469-9985. ; 58:4, s. 2167-2173
  • Tidskriftsartikel (refereegranskat)abstract
    • Relative population of states in 11B following the 12C(γ,p) reaction has been measured with high resolution using the deexcitation γ-ray technique. The states near 7 MeV in 11B are clearly resolved and the measured population clarifies earlier conflicting data. Comparison of the results with new calculations indicates the importance of both one-nucleon and multinucleon processes.
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  • Sims, D. A., et al. (författare)
  • (γ,n) study of the isovector quadrupole resonance in 40Ca
  • 1997
  • Ingår i: Physical Review C: covering nuclear physics. - 2469-9985. ; 55:3, s. 1288-1294
  • Tidskriftsartikel (refereegranskat)abstract
    • The forward-to-backward asymmetry of neutrons emitted in the 40Ca(γ,n0) reaction was measured at photon energies in the range of 27–50 MeV. An energy-dependent asymmetry was observed that is interpreted as evidence of interference between the isovector quadrupole resonance and the giant dipole resonance. Data analysis in terms of semiclassical and direct-semidirect models estimate the isovector quadrupole resonance to be at an excitation energy of 31.0±1.5 MeV, with a width of 16.0±1.5 MeV, and exhausting most of the energy-weighted sum rule for the isovector quadrupole resonance.
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  • Hedeland, M, et al. (författare)
  • Cellobiohydrolase I as a chiral additive in capillary electrophoresis and liquid chromatography
  • 1998
  • Ingår i: JOURNAL OF CHROMATOGRAPHY A. - : ELSEVIER SCIENCE BV. ; 807:2
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Cellobiohydrolase I(CBH I) was used as a chiral selector in free solution in capillary electrophoresis, applying the partial filling technique. The enantiomers of the amino alcohols oxprenolol and propranolol could be completely resolved with selector pl
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  • Massih, Ali R, et al. (författare)
  • Modelling the behaviour of a control-element blade during irradiation
  • 1997
  • Ingår i: Computers & Structures. ; 64:5-6, s. 1113-1127
  • Konferensbidrag (refereegranskat)abstract
    • The control-rod elements in a boiling-water reactor contain natural boron carbide (B4C) powder, used as neutron-absorber material and clad in stainless-steel blades. During in-reactor service, the internal production of helium gas and point defects in neutron-irradiated boron carbide cause swelling which can induce significant contact stresses in the blade causing, eventually, stress-corrosion cracking of the blades. In this work, a finite-element analysis of a control-rod blade consisting of B4C powder and stainless-steel cladding has been performed using ADINA. An algorithm for the finite-element calculation of a porous material such as B4C powder has been developed and which models both swelling and consolidation behaviour of B4C powder. The Drucker-Prager constitutive law has been used to model the consolidation effect. The model has been verified with an analytical solution for a simple geometry. A number of cases with B4C powder in contact with stainless steel and using the actual blade design have been studied for which contact stresses, the displacements and the effective stresses are calculated. Finally, the model has been used to predict the deformation of the blade during irradiation under B4C swelling and irradiation-induced creep of stainless steel.
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  • Resultat 1-13 av 13

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