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Sökning: swepub > Tidskriftsartikel > Lunds universitet > (1970-1974)

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  • Olofsson, Gunnar (författare)
  • SSU - socialdemokratins rekrytskola?
  • 1971
  • Ingår i: Arkiv för studier i arbetarrörelsens historia. - Lund : Arkiv förlag & tidskrift. - 0345-0333. ; 1:1, s. 60-74
  • Tidskriftsartikel (refereegranskat)
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  • Akselsson, Roland, et al. (författare)
  • A Beam Mapping Method
  • 1971
  • Ingår i: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. - 0167-5087. ; 91:4, s. 663-664
  • Tidskriftsartikel (refereegranskat)
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  • Akselsson, Roland, et al. (författare)
  • X-Ray Production by 1.5-11 MeV Protons
  • 1974
  • Ingår i: Zeitschrift für Physik. - 0044-3328. ; 266:4, s. 245-255
  • Tidskriftsartikel (refereegranskat)abstract
    • K-shell ionization and L x-ray production cross-sections by proton impact have been determined from measurements of K x-ray yields from thin targets of Ti, Fe, Co, Cu, Ni and Ag and of L x-ray yields from Au and Pb. The proton energies varied from 1.5 to 11 MeV. A Si(Li) semiconductor detector recorded the x-rays. The total error in the measured cross-sections is mostly less than 5 %. Kβ/Kα, ratios and Lι,β,ƴ/Lα, ratios have been determined. Ionization cross-sections have been compared with predictions of the plane-wave Born approximation (PWBA) and the binary-encounter approximation (BEA). Both theories describe the ionization quite well: PWBA is, however, better for higher proton energies whereas BEA is superior for lower energies. An empirical formula for ionization cross-sections is derived.
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  • Almbladh, Carl-Olof (författare)
  • Incomplete Relaxation in a model problem for the Auger process
  • 1974
  • Ingår i: Il Nuovo Cimento B. - 1124-187X. ; 23:1, s. 76-89
  • Tidskriftsartikel (refereegranskat)abstract
    • Excitation of a core electron and the subsequent emission of an Auger electron is described in a simplified model, where the core electrons couple only to the plasma oscillations of the conduction electrons and not to individual electron-hole excitations. Results are evaluated to lowest nontrivial order, namely when only terms linear in the interaction with the exciting probe and linear in the Auger coupling are kept. This leads to a four-particle Green’s function which can be evaluated exactly within the present simple model. It is shown explicitly that for long core-hole lifetimes the Auger spectrum is the same as in the two-step approximation (complete relaxation). The possibilities of high-energy satellites in the case of short core-hole lifetimes are discussed.
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  • Aly, Gharib, et al. (författare)
  • Dynamical behavior of mixer settlers II: Models and identification
  • 1972
  • Ingår i: Journal of Applied Chemistry and Biotechnology. - : Wiley. - 0375-9210. ; 22:11, s. 1165-1184
  • Tidskriftsartikel (refereegranskat)abstract
    • Mathematical models explaining the dynamics of the mixer-settler unit are investigated. It is shown that the static model is inadequate in this context and a two-part dynamic model is proposed.
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  • Resultat 1-10 av 222

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