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Optical spectroscopic characterizations of laser irradiated olivine grains
Yang, Yazhou1; Zhang, Hao1,2; Wang, Ziwei1; Yuan, Ye1; Li, Shaolin3; Hsu, Weibiao3; Liu, Chujian4
2017
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN1432-0746
Volume597Pages:13
Corresponding AuthorYang, Yazhou(yangyazhou1@gmail.com)
AbstractContext. 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.
Keywordmethods: laboratory: solid state techniques: spectroscopic radiative transfer planets and satellites: surfaces infrared: general planets and satellites: composition
DOI10.1051/0004-6361/201629327
WOS KeywordINTERSTELLAR SILICATE MINERALOGY ; HAPKE PHOTOMETRIC MODEL ; NANOPHASE IRON PRODUCTION ; REFLECTANCE SPECTRA ; INFRARED-SPECTROSCOPY ; ION IRRADIATION ; LUNAR REGOLITH ; SPACE ; SIMULATION ; STEPS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000392392900106
PublisherEDP SCIENCES S A
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23307
Collection中国科学院紫金山天文台
Corresponding AuthorYang, Yazhou
Affiliation1.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
Recommended Citation
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.
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