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<p>The interaction characteristics of accelerated 3.2 MeV/nucleon xenon ions with 100-μm-thick thermal-radiation-modified polytetrafluoroethylene (TRM-PTFE) films were determined using computer simulation. It was found that the initially homogeneous TRM-PTFE sample was transformed during radiolysis into a layered structure including zones of intense and partial radiolysis and a layer of intact polymer. The spatial distribution characteristics of ionization losses and the absorbed dose field in the region of radiation damage around the latent track of a xenon ion were calculated. The optical properties of 100-μm-thick TRM-PTFE films exposed to 3.2 MeV/nucleon xenon ions up to a fluence of 1.08·10<sup>6</sup> cm<sup>–2</sup> were studied. Optical spectra of TRM-PTFE exhibited absorption maxima at 206 and 476 (374, 578) nm, which may have been due to isolated double bonds and polyene structures containing 14 conjugated double bonds, respectively. Radiation-induced interference was detected and may have been due to the formation of a 0.34–0.39-μm-thick radiation-damaged layer that may have been located up to ~36 μm from the surface of the TRM-PTFE sample. It was concluded that the predicted estimates of radiation-induced changes in the optical properties of TRM-PTFE films and the experimental data were correlated.</p>

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Changes in Optical Properties of Thermal-radiation-modified Polytetrafluoroethylene Exposed to Accelerated Xenon Ions

  • 期刊论文

  • 发表日期：

    2026年7月22日

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  • O. V. Belov,
  • N. E. Pukhaeva,
  • M. M. Paraipan,
  • S. M. Ryndya,
  • L. V. Moskvitin,
  • S. V. Slesarenko,
  • S. A. Tokovoy,
  • A. S. Smolyansky

摘要

The interaction characteristics of accelerated 3.2 MeV/nucleon xenon ions with 100-μm-thick thermal-radiation-modified polytetrafluoroethylene (TRM-PTFE) films were determined using computer simulation. It was found that the initially homogeneous TRM-PTFE sample was transformed during radiolysis into a layered structure including zones of intense and partial radiolysis and a layer of intact polymer. The spatial distribution characteristics of ionization losses and the absorbed dose field in the region of radiation damage around the latent track of a xenon ion were calculated. The optical properties of 100-μm-thick TRM-PTFE films exposed to 3.2 MeV/nucleon xenon ions up to a fluence of 1.08·106 cm–2 were studied. Optical spectra of TRM-PTFE exhibited absorption maxima at 206 and 476 (374, 578) nm, which may have been due to isolated double bonds and polyene structures containing 14 conjugated double bonds, respectively. Radiation-induced interference was detected and may have been due to the formation of a 0.34–0.39-μm-thick radiation-damaged layer that may have been located up to ~36 μm from the surface of the TRM-PTFE sample. It was concluded that the predicted estimates of radiation-induced changes in the optical properties of TRM-PTFE films and the experimental data were correlated.