PT Journal
AU Molina, F
   Aguilera, P
   Romero-Barrientos, J
   Arellano, HF
   Agramunt, J
   Medel, J
   Morales, JR
   Zambra, M
TI Energy distribution of the neutron flux measurements at the Chilean Reactor RECH-1 using multi-foil neutron activation and the Expectation Maximization unfolding algorithm
SO Applied Radiation and Isotopes
JI Appl. Radiat. Isot.
PY 2017
BP 28
EP 34
VL 129
DI 10.1016/j.apradiso.2017.08.001
AB We present a methodology to obtain the energy distribution of the neutron flux of an experimental nuclear reactor, using multi-foil activation measurements and the Expectation Maximization unfolding algorithm, which is presented as an alternative to well known unfolding methods such as GRAVEL. Self-shielding flux corrections for energy bin groups were obtained using MCNP6 Monte Carlo simulations. We have made studies at the at the Dry Tube of RECH-1 obtaining fluxes of 1.5(4) x 10(13) cm(-2) s(-1) for the thermal neutron energy region, 1.9(5) x 10(12) cm(-2) s(-1) for the epithermal neutron energy region, and 4.3(11) x 10(11) cm(-2) s(-1) for the fast neutron energy region.
ER