Electronic energy loss of the latent track in heavy ion-irradiated polyimide

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	Electronic energy loss of the latent track in heavy ion-irradiated polyimide
	Liu, J; Sun, YM; Song, Y; Duan, JL; Wang, ZG; Jin, YF; Zhang, CH
刊名	ACTA PHYSICA SINICA
	2005-11-01
卷号	54 期号:11 页码:5269-5273
关键词	ion irradiation latent tracks infrared spectroscopy thermal spike model
ISSN号	1000-3290
英文摘要	In the interaction process of a swift heavy ion (SHI) and polymer, a latent track with radius of several nanometers appears near the ion trajectory due to the dense ionization and excitation. To describe the role of electronic energy loss (dE/dX)(e), multi layer stacks (with different dE/dX) of polyimide (PI) films were irradiated by different SHIs (1.158GeV Fe-56 and 1. 755 GeV Xe-136) under vacuum at room temperature. Chemical changes of modified PI films were studied by Fourier Transform Infrared (FTIR) spectroscopy. The main feature of SHI irradiation is the degradation of the functional group and creation of alkyne. The chain disruption rate of PI was investigated in the fluence range from 1 x 10(11) to 6 x 10(12) ions/cm(2) and a wider energy stopping power range (2.2 to 5.2 keV/nm for Fe-56 ions and 8.6 to 11.3 keV/nm for Xe-136 ions). Alkyne formation was observed over the electronic energy loss range of interest. Assuming the saturated track model (the damage process only occur in a cylinder of area sigma), the mean degradation and alkyne formation radii in tracks were deduced for Fe and Xe ion irradiation, respectively. The results were validated by the thermal spike model and the threshold electronic energy loss of track formation S., in PI was deduced. The analysis of the irradiated PI films shows that the predictions of the thermal spike model are in qualitative agreement with the curve shape of experimental results.
WOS关键词	POLYCARBONATE ; METALS
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000233221800050
公开日期	2010-10-29
内容类型	期刊论文
源URL	[http://ir.imp.cas.cn/handle/113462/1105]
专题	近代物理研究所_近代物理研究所知识存储（2010之前）
通讯作者	Sun, YM
作者单位	Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, J,Sun, YM,Song, Y,et al. Electronic energy loss of the latent track in heavy ion-irradiated polyimide[J]. ACTA PHYSICA SINICA,2005,54(11):5269-5273.
APA	Liu, J.,Sun, YM.,Song, Y.,Duan, JL.,Wang, ZG.,...&Zhang, CH.(2005).Electronic energy loss of the latent track in heavy ion-irradiated polyimide.ACTA PHYSICA SINICA,54(11),5269-5273.
MLA	Liu, J,et al."Electronic energy loss of the latent track in heavy ion-irradiated polyimide".ACTA PHYSICA SINICA 54.11(2005):5269-5273.