Optical spectroscopic characterizations of laser irradiated olivine grains
文献类型：期刊论文
| 作者 | Yang, Yazhou; Zhang, Hao; Wang, Ziwei; Yuan, Ye; Li, Shaolin; Hsu, Weibiao; Liu, Chujian |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2017 |
| 卷号 | 597页码:- |
| 英文摘要 | Context. Visible and near-infrared spectra of asteroids are known to be susceptible to nanophase irons produced by space weathering processes, thus making mineral identifications difficult. Mid-infrared spectroscopy may retain more mineral features owing to its lattice vibrational nature.Aims. We investigate the structure and reflectance spectral feature changes of olivine grains before and after simulated space weathering.Methods. We irradiate olivine grains by using pulsed laser to simulate varying degrees of micrometeorite bombardments. Reflectance measurements from 0.5 to 25 mu m and radiative transfer calculations were carried out in order to compare them with each other.Results. Both the experimental simulations and modeling results indicate that the mid-infrared spectral features of olivine grains can survive the intense irradiations. Although the Christansen Feature is slightly shifted to longer wavelength, major vibrational bands remain essentially unchanged, because the lattice structure is quite immune to even the strongest irradiations, as revealed by both the X-ray diffraction and Raman scattering measurements.Conclusions. Mid-infrared spectroscopy is much more immune to productions of nanophase irons and amorphous materials and thus may be used more reliably in remote detections of minerals on asteroid surfaces. |
| 语种 | 英语 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/17443]  |
| 专题 | 中国科学院紫金山天文台 |
| 推荐引用方式 GB/T 7714 | Yang, Yazhou,Zhang, Hao,Wang, Ziwei,et al. Optical spectroscopic characterizations of laser irradiated olivine grains[J]. ASTRONOMY & ASTROPHYSICS,2017,597:-. |
| APA | Yang, Yazhou.,Zhang, Hao.,Wang, Ziwei.,Yuan, Ye.,Li, Shaolin.,...&Liu, Chujian.(2017).Optical spectroscopic characterizations of laser irradiated olivine grains.ASTRONOMY & ASTROPHYSICS,597,-. |
| MLA | Yang, Yazhou,et al."Optical spectroscopic characterizations of laser irradiated olivine grains".ASTRONOMY & ASTROPHYSICS 597(2017):-. |
入库方式： OAI收割
来源：紫金山天文台
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