Testing FLUKA on neutron activation of Si and Ge at nuclear research reactor using gamma spectroscopy
  Samples of two characteristic semiconductor sensor materials, silicon and
germanium, have been irradiated with neutrons produced at the RP-10 Nuclear
Research Reactor at 4.5 MW. Their radionuclides photon spectra have been
measured with high resolution gamma spectroscopy, quantifying four
radioisotopes ($^{28}$Al, $^{29}$Al for Si and $^{75}$Ge and $^{77}$Ge for Ge).
We have compared the radionuclides production and their emission spectrum data
with Monte Carlo simulation results from FLUKA. Thus we have tested FLUKA's low
energy neutron library (ENDF/B-VIIR) and decay photon scoring with respect to
the activation of these semiconductors. We conclude that FLUKA is capable of
predicting relative photon peak amplitudes, with gamma intensities greater than
1%, of produced radionuclides with an average uncertainty of 13%. This work
allows us to estimate the corresponding systematic error on neutron activation
simulation studies of these sensor materials.
