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- W3147871837 abstract "In the interaction process of a swift heavy ion (SHI) and polymer, a latent track with radius of several nanometers appears near the ion trajectory due to the dense ionization and excitation. To describe the role of electronic energy loss (dE/dX)(e), multi layer stacks (with different dE/dX) of polyimide (PI) films were irradiated by different SHIs (1.158GeV Fe-56 and 1. 755 GeV Xe-136) under vacuum at room temperature. Chemical changes of modified PI films were studied by Fourier Transform Infrared (FTIR) spectroscopy. The main feature of SHI irradiation is the degradation of the functional group and creation of alkyne. The chain disruption rate of PI was investigated in the fluence range from 1 x 10(11) to 6 x 10(12) ions/cm(2) and a wider energy stopping power range (2.2 to 5.2 keV/nm for Fe-56 ions and 8.6 to 11.3 keV/nm for Xe-136 ions). Alkyne formation was observed over the electronic energy loss range of interest. Assuming the saturated track model (the damage process only occur in a cylinder of area sigma), the mean degradation and alkyne formation radii in tracks were deduced for Fe and Xe ion irradiation, respectively. The results were validated by the thermal spike model and the threshold electronic energy loss of track formation S., in PI was deduced. The analysis of the irradiated PI films shows that the predictions of the thermal spike model are in qualitative agreement with the curve shape of experimental results." @default.
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- W3147871837 date "2005-01-01" @default.
- W3147871837 modified "2023-09-23" @default.
- W3147871837 title "Electronic energy loss of the latent track in heavy ion-irradiated polyimide" @default.
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