I wonder if the energy data stored in NXSPE files(’/data/energy’, not the fixed_energy) is the neutron energy loss(i.e. = E_i - E_f) or the energy of the neutrons arriving at the detectors(i.e. = E_f ).
Any help would be much appreciated!
yes, it’s the neutron energy transfer (E_i-E_f) not the neutron energy at the detectors, and follows the usual convention that positive values indicate neutron energy loss and negative values indicate the neutron energy gain.
Hope this helps,