Kusumoto T, Mori Y, Kodaira S, Kanasaki M, Barillon R, Yamauchi T. Application of polyimide films as a nuclear track detector (2): A latent track structure study with Fourier transform infrared spectroscopy.
Appl Radiat Isot 2024;
204:111125. [PMID:
38056283 DOI:
10.1016/j.apradiso.2023.111125]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/02/2023] [Accepted: 11/22/2023] [Indexed: 12/08/2023]
Abstract
This paper reports the relation between latent track structure and the detection threshold of etch pits formation in UPILEX-S® 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/μm for Kapton and UPILEX-S®, respectively. The detection threshold of UPILEX-S is 4000 keV/μm 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® 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®.
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