Effects of space weathering on diagnostic spectral features: Results from He+ irradiation experiments
文献类型：期刊论文
| 作者 | Fu, Xiaohui1,2 ; Zou, Yongliao1; Zheng, Yongchun1; Ouyang, Ziyuan1,3
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| 刊名 | ICARUS
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| 出版日期 | 2012-06-01 |
| 卷号 | 219期号:2页码:630-640 |
| 关键词 | Space weathering Moon Asteroids Solar wind |
| 英文摘要 | We performed ion irradiation of mineral samples with 50 keV He+, aimed to investigate ion irradiation effects on diagnostic spectral features. Reflectance spectra of samples in 0.375-2.5 mu m are measured before and after ion irradiation. Silicates, including Luobusha olivine, plagioclase and basaltic glass, have shown reddening and darkening of reflectance spectra at the VIS-NIR range. Olivine is more sensitive to ion irradiation than plagioclase and basaltic glass. Irradiated Panzhihua ilmenite exhibits higher reflectance and stronger absorption features, which is totally different from lunar soil and analog silicate materials in other experiments. Using continuum removal and MGM fit, we extracted and compared absorption features of olivine spectra before and after irradiation. Ion irradiation can induce band strength decrease of olivine but negligible band centers shift. We estimate band centers shift caused by ion irradiation are quite limited, even less than variations due to chemical composition in silicates. It provides one possible explanation for no systematic shift in band positions in lunar soil. Irradiated Luobusha olivine spectrum matches spectra of olivine-dominated asteroids. Our results suggest space weathering should be new clues to explain the subtle difference between A-type asteroid spectra and laboratory spectra of olivine. (c) 2012 Elsevier Inc. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000305050200010 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6143]  |
| 专题 | 国家天文台_月球与深空探测研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Xiaohui,Zou, Yongliao,Zheng, Yongchun,et al. Effects of space weathering on diagnostic spectral features: Results from He+ irradiation experiments[J]. ICARUS,2012,219(2):630-640. |
| APA | Fu, Xiaohui,Zou, Yongliao,Zheng, Yongchun,&Ouyang, Ziyuan.(2012).Effects of space weathering on diagnostic spectral features: Results from He+ irradiation experiments.ICARUS,219(2),630-640. |
| MLA | Fu, Xiaohui,et al."Effects of space weathering on diagnostic spectral features: Results from He+ irradiation experiments".ICARUS 219.2(2012):630-640. |
入库方式： OAI收割
来源：国家天文台
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