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Träfflista för sökning "WFRF:(Nitsche H.) srt2:(2006-2009)"

Sökning: WFRF:(Nitsche H.) > (2006-2009)

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1.
  • Jeppesen, H. B., et al. (författare)
  • Multi-quasiparticle states in (256)Rf
  • 2009
  • Ingår i: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 79:3, s. 031303-
  • Tidskriftsartikel (refereegranskat)abstract
    • Excited states in (256)Rf were populated via the Pb-208(Ti-50,2n) fusion-evaporation reaction. Delayed gamma-ray and electron decay spectroscopy was performed and three isomeric states in (256)Rf have been identified. A fourth low-energy nonyrast state was identified from the gamma-ray decay of one of the higher lying isomers. The states are interpreted as multi-quasiparticle excitations.
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2.
  • Andersson, Sofie, 1976, et al. (författare)
  • Berkelium nitrate complex formation using a solvent extraction technique
  • 2006
  • Ingår i: Radiochimica Acta. - : Walter de Gruyter GmbH. - 0033-8230 .- 2193-3405. ; 94:1, s. 59-61
  • Tidskriftsartikel (refereegranskat)abstract
    • The extraction of Bk(III) into an organic phase consisting of 2,6-bis-(benzoxazolyl)-4-dodecyloxylpyridine, 2-bromodecanoic acid and tert-butyl benzene as a function of nitrate ion concentration in the aqueous phase was studied in order to determine the stability constants of the formation of Bk nitrate complexes. Increasing the nitrate ion concentration in the aqueous phase will increase the nitrate complex formation and thus the extraction of metal ions will decrease. Measuring this decrease in distribution ratio and fitting the data points with an appropriate model gives the stability constants of the Bk nitrate complex formation. © by Oldenbourg Wissenschaftsverlag.
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3.
  • Günther, B., et al. (författare)
  • Control of Separation on the Flap of a Three-Element High-Lift Configuration
  • 2007
  • Ingår i: 45th AIAA Aerospace Sciences Meeting and Exhibit. - : AIAA. - 9781563478901
  • Konferensbidrag (refereegranskat)abstract
    • This paper describes a joint experimental and numerical investigation of the control of the flow over the flap of a three-element high-lift configuration by means of periodic excitation. At Reynolds numbers between 0.3 ï¿œ 106 and 1 ï¿œ 106 the flow is influenced by periodic blowing or periodic blowing/suction through slots near the flap leading edge. The delay of flow separation by periodic vertical excitation could be identified in the experiments as well as numerical simulations based on the Unsteady Reynolds-averaged Navier-Stokes equations (URANS). As a result, the mean aerodynamic lift of this practically relevant wing configuration could be significantly enhanced. By investigating different excitation frequencies and intensities optimum control parameters could be found. The behaviour of the aerodynamic forces with varying flap deflection angle are measured on a finite swept wing. Scientific visualisation of the numerical simulations of an infinite swept wing allows a detailed analysis of the structures in this complex flow field and the effect of flow control on these.
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  • Resultat 1-6 av 6

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