Abstract
The partial pressure variation curve of the evolved CO 2 during implantation of 250 keV D + ion beam in Mylar has been experimentally measured and theoretically explained on the basis of a diffusion based model. Unlike the earlier percolation model, our model explains the rising portion of the curve (i.e. the pre-maximum portion) very satisfactorily. This pre-maximum portion is very important as most of the radiolytic processes take place during this short span, due to the high rate of energy deposition by the ion beam. The reasons for the failure of the percolation model in the pre-maximum portion are also explained.
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