Knowledge of νe-Fe/Pb differential cross sections for νe energy below several tens of MeV scaleis believed to be crucial in understanding supernova physics. In a segmented detector at a spallation neutronsource, νe energy reconstructed from the electron range measurement is strongly affected because both multiplescattering and electromagnetic showers occur along the electron passage in target materials. In order toestimate these effects, a simulation study has been performed with a cube block model assuming perfecttracking precision. The energy spectrum distortion is observed to be proportional to the atomic number of thetarget material. Feasibility of unfolding the distorted νe energy spectrum is studied for both Fe and Pb. Anevaluation of the statistical accuracy attainable is therefore provided for a segmented detector.
