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@TECHREPORT{Czyzykiewicz:135850,
      author       = {Czyzykiewicz, Rafal},
      title        = {n and n' meson production in the quasi-free proton-neutron
                      collisions at the {COS}-11 facility},
      volume       = {4017},
      number       = {Juel-4017},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-135850, Juel-4017},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {71 S.},
      year         = {2002},
      note         = {Record converted from JUWEL: 18.07.2013},
      abstract     = {Both, the structure of the $\eta$' meson as well as its
                      production mechanism are still under strong discussion and
                      debate. The most possible hypothesis concerning the
                      explanation of the almost three times larger mass for this
                      meson observed experimentally relative to the theoretically
                      calculated mass is a gluonium admixture to the $\eta$' wave
                      function. This gluonium admixture should reflect itself in
                      the production yield of the $\eta$' meson in proton-neutron
                      collisions. Since the production of $\eta$' meson through
                      the gluonium exchange is isospin independent, the ratio
                      R$_{\nu}$ = $\frac{\sigma(pn \rightarrow pn\eta)}{\sigma(pp
                      \rightarrow pp \eta)}$ close to threshold is expected to be
                      R$_{\eta}$ = 1, after corrections for initial and final
                      state interactions. The close to threshold $\eta$'
                      production in proton-proton collisions has already been
                      investigated at the COSY-11 facility. Cross section values
                      in the threshold region have been measured. However, until
                      now no data have been taken for the $\eta$' meson production
                      in the proton-neutron collision. In order to investigate the
                      $\eta$' production in proton-neutron collisions at the COSY
                      synchrotron, the COSY-11 facility has been equipped with two
                      new subsystems, namely the neutron detector and the
                      spectator counter. The optimization of the topography for
                      these additional detectors, the selection of the most
                      suitable beam momentum and a discussion for the method of
                      luminosity determination for the quasi-free pn $\rightarrow$
                      pn$\eta$($\eta$') reactions are presented in this thesis.
                      Rates for the production of $\eta$ and $\eta$' mesons in
                      proton-neutron collisions at COSY-11 have been estimated.
                      For the calculations a special fast program has been
                      written.},
      cin          = {IKP-1},
      cid          = {I:(DE-Juel1)VDB23},
      shelfmark    = {PJE - Atomic collision processes},
      typ          = {PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/135850},
}