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Träfflista för sökning "WFRF:(Pomp Stephan) ;mspu:(report)"

Sökning: WFRF:(Pomp Stephan) > Rapport

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1.
  • Al-Adili, Ali, et al. (författare)
  • Ion counting efficiencies at the IGISOL facility
  • 2014
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • At the IGISOL-JYFLTRAP facility, fission mass yields can be studied at high precision. Fission fragments from a U target are passing through a Ni foil and entering a gas filled chamber. The collected fragments are guided through a mass separator to a Penning trap where their masses are identified. This simulation work focuses on how different fission fragment properties (mass, charge and energy) affect the stopping efficiency in the gas cell. In addition, different experimental parameters are varied (e. g. U and Ni thickness and He gas pressure) to study their impact on the stopping efficiency. The simulations were performed using the Geant4 package and the SRIM code. The main results suggest a small variation in the stopping efficiency as a function of mass, charge and kinetic energy. It is predicted that heavy fragments are stopped about 9% less efficiently than the light fragments. However it was found that the properties of the U, Ni and the He gas influences this behavior. Hence it could be possible to optimize the efficiency.
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2.
  • Andersson, Pernilla, et al. (författare)
  • An upgrade of the SCANDAL facility for neutron scattering measurements at 175 MeV
  • 2009
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The experimental setup SCANDAL (SCAttered Nucleon Detection AssembLy) at the The Svedberg Laboratory (TSL), previously used for measurements of the differential cross section of elastic and inelastic neutron scattering in the 50 – 130 MeV range, has recently been upgraded with new Na doped CsI scintillating detectors for measurements at 175 MeV. The performance of the new setup is described and illustrated by the early steps in the analysis of the first experimental campaign, carried out in January and February 2009.
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