Effect of re-acceleration on cosmic ray components

Re-acceleration of cosmic rays in interstellar space has been studied in detail in order to examine the behaviour of the ratios of secondary to primary nuclei in cosmic radiation. It is found that modest acceleration in a confinement region, where particles escape more freely at high energies, provides a better fit to the observed data. We have studied the effect of re-acceleration on the spectral shape of proton and helium components of cosmic rays. We have examined wto different models and showed that re-acceleration provides a poor fit to the observed proton data.