  In typical nuclear physics experiments with radioactive ion beams (RIBs)
selected by the in-flight separation technique, Si detectors or ionization
chambers are usually equipped for the charge determination of RIBs. The
obtained charge resolution relies on the performance of these detectors for
energy loss determination, and this affects the particle identification
capability of RIBs. We present an approach on improving the resolution of
charge measurement for heavy ions by using the abundant energy loss information
from different types of existing detectors along the beam line. Without
altering the beam line and detectors, this approach can improve the charge
resolution by more than 12\% relative to the multiple sampling ionization
chamber of the best resolution.
