Study of Coincidence Doppler Broadening in Carbon Nanotubes
Coincidence Doppler broadening measurements of positron annihilation for multi- walled carbon nanotubes, double-walled carbon nanotubes, single-walled carbon nanotubes and graphite were performed. The ratio curves of the Doppler broadening for these samples to silicon were obtained. It is shown that...
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| Published in | Plasma science & technology Vol. 14; no. 5; pp. 431 - 433 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.05.2012
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1009-0630 |
| DOI | 10.1088/1009-0630/14/5/23 |
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| Abstract | Coincidence Doppler broadening measurements of positron annihilation for multi- walled carbon nanotubes, double-walled carbon nanotubes, single-walled carbon nanotubes and graphite were performed. The ratio curves of the Doppler broadening for these samples to silicon were obtained. It is shown that there are distinct peaks at the position of 10xl0-arn0c for both carbon nanotubes and graphite, however the amplitudes of the peaks are not the same. We have the opinion that these peaks arise from the annihilation of positron with the 2s and 2p electron of carbon element. |
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| AbstractList | Coincidence Doppler broadening measurements of positron annihilation for multi- walled carbon nanotubes, double-walled carbon nanotubes, single-walled carbon nanotubes and graphite were performed. The ratio curves of the Doppler broadening for these samples to silicon were obtained. It is shown that there are distinct peaks at the position of 10xl0-arn0c for both carbon nanotubes and graphite, however the amplitudes of the peaks are not the same. We have the opinion that these peaks arise from the annihilation of positron with the 2s and 2p electron of carbon element. |
| Author | 郭卫锋 郝颖萍 成斌 刘建党 杜淮江 翁惠民 叶邦角 |
| AuthorAffiliation | Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China Department Of Physics, Artillery Academy of PLA, Hefei 230031, China |
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| Notes | Coincidence Doppler broadening measurements of positron annihilation for multi- walled carbon nanotubes, double-walled carbon nanotubes, single-walled carbon nanotubes and graphite were performed. The ratio curves of the Doppler broadening for these samples to silicon were obtained. It is shown that there are distinct peaks at the position of 10xl0-arn0c for both carbon nanotubes and graphite, however the amplitudes of the peaks are not the same. We have the opinion that these peaks arise from the annihilation of positron with the 2s and 2p electron of carbon element. GUO Weifeng, HAO Yingping , CHENG Bin, LIU Jiandang , DU Huaijiang , WENG Huimin , YE Bangjiao （Department of Modern Physics, University of Science and Technology of China Hefei 230026, China ;Department of Physics, Artillery Academy of PLA, Hefei 230031, China） 34-1187/TL positron annihilation, coincidence Doppler broadening, carbon nanotubes |
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| SubjectTerms | 单壁碳纳米管 双壁碳纳米管 多壁碳纳米管 多普勒展宽 正电子湮没 石墨 碳元素 |
| Title | Study of Coincidence Doppler Broadening in Carbon Nanotubes |
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