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@INPROCEEDINGS{Ophoven:972036,
      author       = {Ophoven, Niklas},
      title        = {{A} fast neutron filter for the {HPG}e detector of
                      {F}a{NG}a{S} pt. 2},
      reportid     = {FZJ-2023-01045},
      year         = {2023},
      abstract     = {Complementary to Prompt Gamma Neutron Activation Analysis
                      (PGNAA) with cold or thermal neutrons, the FaNGaS (Fast
                      Neutron-induced Gamma-ray Spectrometry) instrument installed
                      at Heinz Maier-Lebnitz Zentrum (MLZ), enables
                      non-destructive analysis of large objects via the detection
                      of prompt gamma rays emitted in inelastic scattering or
                      other fast-neutron-induced reactions [1-6]. Besides creating
                      a modern and comprehensive catalogue of (n,n’γ) reactions
                      another major objective is to optimize the instrument design
                      with regard to its efficiency and sensitivity. As a certain
                      fraction of fast neutrons always scatters from the sample
                      towards the high-purity germanium (HPGe) detector, a filter
                      material must be placed in the collimation tract of the
                      outer shielding to reduce undesired background as well as to
                      prevent saturation of the detector due to higher gamma-ray
                      fluxes in thick samples.In this talk, originally intended to
                      be held at the 2nd PhD days 2022, the final results of
                      filter simulations performed with MCNP6 are given. Important
                      results from the last talk are repeated. This time a major
                      focus is set on the gamma-ray performance, i.e. how the
                      filter material influences the gamma-ray flux and
                      efficiency. The main results are also illustrated on a print
                      poster that will be presented in the following discussion.},
      organization  = {(Digital) Institute Seminar JCNS-2,
                       Forschungszentrum Jülich, JCNS +
                       online (Germany + online)},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/972036},
}