Simulation Experiment Based on Monte Carlo Quantum Method

Simulation programmes which combine the quantum model and Monte Carlo method by Schulz et al. are developed to reconstruct the experimental spectra of the single ionization in collisions between 100 MeV/u \rmC^6+ and He (Nature, 2003, 422(6927): 48.). By introducing the uncertainty of the experimental set-ups the discrepancy between the theory and the experimental data can be studied. The simulation results show that the position resolution of the detector, target temperature and the small fluctuation of the extraction DC voltage applied to the spectrometer can have a significant influence on the final experimental results. The experimental fully differential cross sections can be reproduced when the target temperature reaches 16 K, or the voltage fluctuation reaches 0.05 V, which provides an alternative perspective for the long-term \rmC^6+ puzzle. The simulation also provides a practical method for fast discrimination of influences from different set-up aspects in real few-body quantum dynamics experiments.