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| Hauptseite > Publikationsdatenbank > Fission Neutron PGAA from inelastic scattering reactions – first results of FaNGaS |
| Hauptseite > Publikationsdatenbank > Fission Neutron PGAA from inelastic scattering reactions – first results of FaNGaS |
| Conference Presentation (Other) | FZJ-2015-05579 |
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2015
Abstract: A beam of fission neutrons extracted at the SR10 beam line of the FRM II Research Reactor in Garching has been used to study inelastic scattering reactions and related product nuclei with a new instrument Fast Neutron Gamma Spectroscopy (FaNGaS). Complimentary to cold neutron PGAA, with FaNGaS (n,n’) reactions induced by fission neutrons can be studied. Prompt Gamma lines from inelastic scattering reactions up to now have been rarely studied and no adequate compilation of the emitted gamma energies exist. In developing non-destructive analytical techniques using neutron generator based PGAA such data are badly needed for quantification of heavy metals and actinides in e.g. nuclear waste, hazardous materials, or safeguards samples.A number of elements and relevant actinides have been irradiated in the fast neutron beam SR10 at the FRM II reactor in Garching, Germany. A heavily shielded 50% eff. HPGe detector perpendicular to the beam is looking at the samples exposed to ≈ 108 cm-2s-1 fission neutrons. Prompt and delayed gamma spectra have been taken and evaluated using the available data in scattered reports. Additional gamma lines have been detected and are being compiled to create a data base for (n,n’) reactions. Particular emphasis is given on actinides including 238U, as well as on shielding materials such as Cd, W and Pb. Some examples will be given and first results will be discussed in this contribution.
Keyword(s): Others (1st) ; Instrument and Method Development (2nd)
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