Study on depth profile of heavy ion irradiation effects in poly(tetrafluoroethylene-co-ethylene)

Tomoko Gowa; Tomoyuki Shiotsu; Tatsuya Urakawa; Toshitaka Oka; Takeshi Murakami; Akihiro Oshima; Yoshimasa Hama; Masakazu Washio

doi:10.1016/j.radphyschem.2010.07.044

Study on depth profile of heavy ion irradiation effects in poly(tetrafluoroethylene-co-ethylene)

Tomoko Gowa^*, Tomoyuki Shiotsu, Tatsuya Urakawa, Toshitaka Oka, Takeshi Murakami, Akihiro Oshima, Yoshimasa Hama, Masakazu Washio

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

High linear energy transfer (LET) heavy ion beams were used to irradiate poly(tetrafluoroethylene-co-ethylene) (ETFE) under vacuum and in air. The irradiation effects in ETFE as a function of the depth were precisely evaluated by analyzing each of the films of the irradiated samples, which were made of stacked ETFE films. It was indicated that conjugated double bonds were generated by heavy ion beam irradiation, and their amounts showed the Bragg-curve-like distributions. Also, it was suggested that higher LET beams would induce radical formation in high density and longer conjugated C=C double bonds could be generated by the second-order reactions. Moreover, for samples irradiated in air, C=O was produced correlating to the yield of oxygen molecules diffusing from the sample surface.

Original language	English
Pages (from-to)	264-267
Number of pages	4
Journal	Radiation Physics and Chemistry
Volume	80
Issue number	2
DOIs	https://doi.org/10.1016/j.radphyschem.2010.07.044
Publication status	Published - 2011 Feb

Keywords

Conjugated double bonds
ETFE
Heavy ion
High LET

ASJC Scopus subject areas

Radiation

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10.1016/j.radphyschem.2010.07.044

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title = "Study on depth profile of heavy ion irradiation effects in poly(tetrafluoroethylene-co-ethylene)",

abstract = "High linear energy transfer (LET) heavy ion beams were used to irradiate poly(tetrafluoroethylene-co-ethylene) (ETFE) under vacuum and in air. The irradiation effects in ETFE as a function of the depth were precisely evaluated by analyzing each of the films of the irradiated samples, which were made of stacked ETFE films. It was indicated that conjugated double bonds were generated by heavy ion beam irradiation, and their amounts showed the Bragg-curve-like distributions. Also, it was suggested that higher LET beams would induce radical formation in high density and longer conjugated C=C double bonds could be generated by the second-order reactions. Moreover, for samples irradiated in air, C=O was produced correlating to the yield of oxygen molecules diffusing from the sample surface.",

keywords = "Conjugated double bonds, ETFE, Heavy ion, High LET",

author = "Tomoko Gowa and Tomoyuki Shiotsu and Tatsuya Urakawa and Toshitaka Oka and Takeshi Murakami and Akihiro Oshima and Yoshimasa Hama and Masakazu Washio",

note = "Funding Information: This study was supported by the research project with heavy ions at NIRS-HIMAC (16P186, 19P186). The authors acknowledge staff members of HIMAC operation division and accelerator engineering company for the experiments using high-energy ion beam irradiation.",

year = "2011",

month = feb,

doi = "10.1016/j.radphyschem.2010.07.044",

language = "English",

volume = "80",

pages = "264--267",

journal = "Radiation Physics and Chemistry",

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AU - Gowa, Tomoko

AU - Shiotsu, Tomoyuki

AU - Urakawa, Tatsuya

AU - Oka, Toshitaka

AU - Murakami, Takeshi

AU - Oshima, Akihiro

AU - Hama, Yoshimasa

AU - Washio, Masakazu

N1 - Funding Information: This study was supported by the research project with heavy ions at NIRS-HIMAC (16P186, 19P186). The authors acknowledge staff members of HIMAC operation division and accelerator engineering company for the experiments using high-energy ion beam irradiation.

PY - 2011/2

Y1 - 2011/2

N2 - High linear energy transfer (LET) heavy ion beams were used to irradiate poly(tetrafluoroethylene-co-ethylene) (ETFE) under vacuum and in air. The irradiation effects in ETFE as a function of the depth were precisely evaluated by analyzing each of the films of the irradiated samples, which were made of stacked ETFE films. It was indicated that conjugated double bonds were generated by heavy ion beam irradiation, and their amounts showed the Bragg-curve-like distributions. Also, it was suggested that higher LET beams would induce radical formation in high density and longer conjugated C=C double bonds could be generated by the second-order reactions. Moreover, for samples irradiated in air, C=O was produced correlating to the yield of oxygen molecules diffusing from the sample surface.

AB - High linear energy transfer (LET) heavy ion beams were used to irradiate poly(tetrafluoroethylene-co-ethylene) (ETFE) under vacuum and in air. The irradiation effects in ETFE as a function of the depth were precisely evaluated by analyzing each of the films of the irradiated samples, which were made of stacked ETFE films. It was indicated that conjugated double bonds were generated by heavy ion beam irradiation, and their amounts showed the Bragg-curve-like distributions. Also, it was suggested that higher LET beams would induce radical formation in high density and longer conjugated C=C double bonds could be generated by the second-order reactions. Moreover, for samples irradiated in air, C=O was produced correlating to the yield of oxygen molecules diffusing from the sample surface.

KW - Conjugated double bonds

KW - ETFE

KW - Heavy ion

KW - High LET

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M3 - Article

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SN - 0969-806X

VL - 80

SP - 264

EP - 267

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

IS - 2

ER -

Study on depth profile of heavy ion irradiation effects in poly(tetrafluoroethylene-co-ethylene)

Abstract

Keywords

ASJC Scopus subject areas

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