Navegação Ciências Exatas e da Terra por Autor "Sundqvist, B.U.R."

Resultados 1-3 de 3

    • Chemical damage in poly (phenylene sulphide) from fast ions: dependence on the primary-ion stopping power 

      Papaleo, Ricardo Meurer; Hallen, A.; Sundqvist, B.U.R.; Araujo, Marco Aurelio de; Johnson, R.E.; Farenzena, Lucio Sartori; Livi, Rogerio Pohlmann (1996) [Artigo de periódico]
      Thin poly(phenylene sulphide) foils were bombarded with fast atomic ions (4He, 12C, 16O, 32S, 79Br, 127I) in the energy range between 2.5 to 78 MeV. In order to maintain the same ion track size for all impacting ions, their ...

    • Low-mass secondary-ion ejection from molecular solids by mev heavy ions : radial velocity distributions 

      Papaleo, Ricardo Meurer; Demirev, P.; Eriksson, J.; Hakansson, P.; Sundqvist, B.U.R. (1996) [Artigo de periódico]
      Secondary ions sputtered in individual MeV ion impacts are analyzed in a high resolution time-of-flight mass spectrometer. The initial radial velocity distributions of low mass (up to m/z≈300 u) positive and negative ...

    • Measurement of MeV ion track structure in an organic solid 

      Papaleo, Ricardo Meurer; Demirev, P.; Eriksson, J.; Hakansson, P.; Sundqvist, B.U.R.; Johnson, R.E. (1996) [Artigo de periódico]
      Radial velocities and effective ejection radii of hydrocarbon secondary ions sputtered electronically from polymer films have been experimentally determined. Using these data, the radial profiles of the energy and momentum ...