  For future MeV-scale neutrino experiments, a Cherenkov scintillation
detector, CSD, is of particular interest for its capability to reconstruct both
energy and direction for charged particles. A type of new target material, slow
liquid scintillator, SlowLS, which can be used to separate Cherenkov and
scintillation lights, is one of the options for the neutrino detectors. A
multi-hundred ton spherical CSD is simulated using a Geant4-based Monte Carlo
software, which handles the detailed the micro processes of MeV particles and
optical photons and the functions for photomultiplier, PMT, and readout
electronics. Twelve SlowLS samples are simulated and studied to cover a wide
range of scintillation light yields and scintillation emission time constants.
Based on the detailed knowledge of the signal processes, simplified functions
are constructed to predict the charge and time signals on the PMTs to fulfill
an efficient reconstruction for the energy, direction, and position of charged
particles. The performance of the SlowLS reconstruction, including the
resulting energy, angular, and position resolution, and particle identification
capability, is presented for these samples. The dependence of the performance
on the scintillation light yield and emission time constants is understood.
This study will be a guideline for future MeV-scale neutrino CSD design and
SlowLS development for the interested physics goals.
