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...

Full description

Saved in:
Bibliographic Details
Published inChinese physics letters Vol. 33; no. 1; pp. 100 - 103
Main Author 文琪 王鹏飞 凌云 汪茂 闫东晓 曹兴忠 王宝义 王宇钢
Format Journal Article
LanguageEnglish
Published 2016
Subjects
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
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/33/1/016103

Cover

More Information
Summary: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.
Bibliography: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
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/1/016103