Application of polyimide films as a nuclear track detector (2): A latent track structure study with Fourier transform infrared spectroscopy
APPLIED RADIATION AND ISOTOPES(2024)
摘要
This paper reports the relation between latent track structure and the detection threshold of etch pits formation in UPILEX-S (R) and Kapton. At the similar stopping power value, effective track core radii and G values for heavier ions are lower than those of lighter ions. These results would be due to the difference of the radial dose distribution for low- and high-velocity ions. The G value starts more rapidly rising above 600 and 1000 keV/mu m for Kapton and UPILEX-S (R), respectively. The detection threshold of UPILEX-S is 4000 keV/mu m for Ar ions, at which effective track core radii of all functional groups are larger than 2 nm. Since the length of a molecule unit of UPILEX-S (R) is about 1.4 nm, at least more than two molecule units have to be damaged for the etch pit formation. A similar discussion is applicable to Kapton, whose detection threshold is significantly lower than UPILEX-S (R).
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关键词
Heavy ion,UPILEX,Radial dose distribution theory,Track detector
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