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Träfflista för sökning "WFRF:(Bohgard Mats) srt2:(1980-1984)"

Sökning: WFRF:(Bohgard Mats) > (1980-1984)

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21.
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22.
  • Malmqvist, Klas, et al. (författare)
  • Performance of a Personal Low-Weight Aerosol Sampler with Particle Size Fractionation and Time Resolution
  • 1983
  • Ingår i: Journal of Aerosol Science. - : Elsevier BV. - 0021-8502. ; 14:3, s. 409-413
  • Konferensbidrag (refereegranskat)abstract
    • A low-weight aerosol sampler has been developed and tested. Internal losses for both sub-micron and large particles ( < 10 tam) are of the order of 5 %. The size fractionation patterns indicate that the sampler may be used to collect a separate respirable fraction in good agreement with the BMRC standard and a coarse fraction deternuned by the inlet design.
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23.
  • Swietlicki, Erik, et al. (författare)
  • PIXE Detection Limits for some Aerosol Collection Substrates by Excitation with protons and 4He2+ Ions from a 3 MV Tandem Accelerator
  • 1984
  • Ingår i: Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. - 0168-583X. ; :1084, s. 441-445
  • Tidskriftsartikel (refereegranskat)abstract
    • Comparisons of PIXE detection limits for K, X rays using 2-5 MeV protons and 7-8 MeV 4He2+ ions as projectiles have been performed. The comparisons have been made for common aerosol backings. According to simple theoretical considerations regarding X-ray production cross sections and the production of background radiation, detection limits for 4He2+ should be two to four times lower than for protons for equal vefoeity projectiles of equal numbers. However, the background in X-ray spectra arising from gamma-quanta being Compton scattered in the Si(Li) detector can strongIy affect the detection limits. The detection limits using protons and 4HeZ+ ions from a 3 MV electrostatic tandem accelerator are determined and discussed.
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  • Resultat 21-23 av 23

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