Influence of UV-Irradiation on Latent Tracks in Polyethylene Terephthalate Films
Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 × 10^9 cm^-2 to 1×10^11 cm^-2. After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavele...
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| Published in | Chinese physics letters Vol. 33; no. 1; pp. 100 - 103 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/33/1/016103 |
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| Abstract | Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 × 10^9 cm^-2 to 1×10^11 cm^-2. After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavelength of 365nm with flux density of 4.2mW/cm^-2. UV-irradiation effects on tracked PET are investigated by the UV-vis spectrum and positron annihilation lifetime spectroscopy （PALS）. It is found that carbonaceous clusters in PET films are generated by ion irradiation and decomposed with UV illumination by calculating the optical energy band gap Eg in the UV-vis spectrum. The free volumes behave differently in track and bulk after UV illumination. In our experiment, the PALS results show an increase in radius and density of free volume in tracked PET films after UV treatment, which indicates an expansion in radius of latent tracks. |
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| AbstractList | Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 × 10^9 cm^-2 to 1×10^11 cm^-2. After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavelength of 365nm with flux density of 4.2mW/cm^-2. UV-irradiation effects on tracked PET are investigated by the UV-vis spectrum and positron annihilation lifetime spectroscopy （PALS）. It is found that carbonaceous clusters in PET films are generated by ion irradiation and decomposed with UV illumination by calculating the optical energy band gap Eg in the UV-vis spectrum. The free volumes behave differently in track and bulk after UV illumination. In our experiment, the PALS results show an increase in radius and density of free volume in tracked PET films after UV treatment, which indicates an expansion in radius of latent tracks. Polyethylene terephthalate (PET) films in thickness of 12 mu m are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 X 10 super(9) cm super(-2) to 1 X 10 super(11) cm super(-2). After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavelength of 365 nm with flux density of 4.2 mW/cm super(-2). UV-irradiation effects on tracked PET are investigated by the UV-vis spectrum and positron annihilation lifetime spectroscopy (PALS). It is found that carbonaceous clusters in PET films are generated by ion irradiation and decomposed with UV illumination by calculating the optical energy band gap E sub(g) in the UV-vis spectrum. The free volumes behave differently in track and bulk after UV illumination. In our experiment, the PALS results show an increase in radius and density of free volume in tracked PET films after UV treatment, which indicates an expansion in radius of latent tracks. |
| Author | 文琪 王鹏飞 凌云 汪茂 闫东晓 曹兴忠 王宝义 王宇钢 |
| AuthorAffiliation | State Key Laboratory of Nut/ear Physics and Technology, Peking University, Beijing 100871 Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 |
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| Notes | 11-1959/O4 Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence from 5 × 10^9 cm^-2 to 1×10^11 cm^-2. After irradiation, ultra-violet lights are used to illuminate the samples with latent tracks at the wavelength of 365nm with flux density of 4.2mW/cm^-2. UV-irradiation effects on tracked PET are investigated by the UV-vis spectrum and positron annihilation lifetime spectroscopy （PALS）. It is found that carbonaceous clusters in PET films are generated by ion irradiation and decomposed with UV illumination by calculating the optical energy band gap Eg in the UV-vis spectrum. The free volumes behave differently in track and bulk after UV illumination. In our experiment, the PALS results show an increase in radius and density of free volume in tracked PET films after UV treatment, which indicates an expansion in radius of latent tracks. Qi Wen, Peng-Fei Wang, Yun Ling, Mao Wang, Dong-Xiao Yan, Xing-Zhong , Bao-Yi Wang, Yu-Gang Wang（ 1 State Key Laboratory of Nut/ear Physics and Technology, Peking University, Beijing 100871 ; 2 Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049） ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| Snippet | Polyethylene terephthalate （PET） films in thickness of 12 μm are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence... Polyethylene terephthalate (PET) films in thickness of 12 mu m are irradiated by Xe and Au ions at the energies of 9.5 and 11.4MeV/u and with the ion fluence... |
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| SubjectTerms | Clusters Energy bands Illumination Irradiation PET薄膜 Polyethylene terephthalates Positron annihilation Thickness Tracking 正电子湮没寿命谱 离子辐照 紫外-可见光谱 紫外光照射 聚对苯二甲酸乙二醇酯 聚酯薄膜 自由体积 |
| Title | Influence of UV-Irradiation on Latent Tracks in Polyethylene Terephthalate Films |
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