Optical spectroscopic characterizations of laser irradiated olivine grains

doi:10.1051/0004-6361/201629327

	Optical spectroscopic characterizations of laser irradiated olivine grains
	Yang, Yazhou 1; Zhang, Hao 1,2; Wang, Ziwei 1; Yuan, Ye 1; Li, Shaolin 3; Hsu, Weibiao 3; Liu, Chujian 4
刊名	ASTRONOMY & ASTROPHYSICS
	2017
卷号	597 页码:13
关键词	methods: laboratory: solid state techniques: spectroscopic radiative transfer planets and satellites: surfaces infrared: general planets and satellites: composition
ISSN号	1432-0746
DOI	10.1051/0004-6361/201629327
通讯作者	Yang, Yazhou(yangyazhou1@gmail.com)
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.
WOS关键词	INTERSTELLAR SILICATE MINERALOGY ; HAPKE PHOTOMETRIC MODEL ; NANOPHASE IRON PRODUCTION ; REFLECTANCE SPECTRA ; INFRARED-SPECTROSCOPY ; ION IRRADIATION ; LUNAR REGOLITH ; SPACE ; SIMULATION ; STEPS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000392392900106
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23306]
专题	中国科学院紫金山天文台
通讯作者	Yang, Yazhou
作者单位	1.China Univ Geosci, Planetary Sci Inst, Sch Earth Sci, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China
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,2017,597:13.
APA	Yang, Yazhou.,Zhang, Hao.,Wang, Ziwei.,Yuan, Ye.,Li, Shaolin.,...&Liu, Chujian.(2017).Optical spectroscopic characterizations of laser irradiated olivine grains.ASTRONOMY & ASTROPHYSICS,597,13.
MLA	Yang, Yazhou,et al."Optical spectroscopic characterizations of laser irradiated olivine grains".ASTRONOMY & ASTROPHYSICS 597(2017):13.