دورية أكاديمية
High-accuracy measurement of mass attenuation coefficients and the imaginary component of the atomic form factor of zinc from 8.51 keV to 11.59 keV, and X-ray absorption fine structure with investigation of zinc theory and nanostructure.
| العنوان: | High-accuracy measurement of mass attenuation coefficients and the imaginary component of the atomic form factor of zinc from 8.51 keV to 11.59 keV, and X-ray absorption fine structure with investigation of zinc theory and nanostructure. |
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| المؤلفون: | Ekanayake RSK; School of Physics, University of Melbourne, Australia., Chantler CT; School of Physics, University of Melbourne, Australia., Sier D; School of Physics, University of Melbourne, Australia., Schalken MJ; School of Physics, University of Melbourne, Australia., Illig AJ; School of Physics, University of Melbourne, Australia., de Jonge MD; ANSTO, Australian Synchrotron, Melbourne, Australia., Johannessen B; ANSTO, Australian Synchrotron, Melbourne, Australia., Kappen P; ANSTO, Australian Synchrotron, Melbourne, Australia., Tran CQ; La Trobe University, Australia. |
| المصدر: | Journal of synchrotron radiation [J Synchrotron Radiat] 2021 Sep 01; Vol. 28 (Pt 5), pp. 1492-1503. Date of Electronic Publication: 2021 Jul 19. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Wiley Online Library Country of Publication: United States NLM ID: 9888878 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1600-5775 (Electronic) Linking ISSN: 09090495 NLM ISO Abbreviation: J Synchrotron Radiat Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: | Publication: [Malden, MA] : Wiley Online Library Original Publication: Copenhagen : Wiley-Blackwell Munksgaard, c1994- |
| مستخلص: | High-accuracy X-ray mass attenuation coefficients were measured from the first X-ray Extended Range Technique (XERT)-like experiment at the Australian Synchrotron. Experimentally measured mass attenuation coefficients deviate by ∼50% from the theoretical values near the zinc absorption edge, suggesting that improvements in theoretical tabulations of mass attenuation coefficients are required to bring them into better agreement with experiment. Using these values the imaginary component of the atomic form factor of zinc was determined for all the measured photon energies. The zinc K-edge jump ratio and jump factor are determined and results raise significant questions regarding the definitions of quantities used and best practice for background subtraction prior to X-ray absorption fine-structure (XAFS) analysis. The XAFS analysis shows excellent agreement between the measured and tabulated values and yields bond lengths and nanostructure of zinc with uncertainties of from 0.1% to 0.3% or 0.003 Å to 0.008 Å. Significant variation from the reported crystal structure was observed, suggesting local dynamic motion of the standard crystal lattice. XAFS is sensitive to dynamic correlated motion and in principle is capable of observing local dynamic motion beyond the reach of conventional crystallography. These results for the zinc absorption coefficient, XAFS and structure are the most accurate structural refinements of zinc at room temperature. |
| فهرسة مساهمة: | Keywords: X-ray mass attenuation coefficients; XAFS; XERT; atomic form factor; computational modelling; density functional theory; materials modelling; materials science; nanoscience; nanostructure; zinc |
| تواريخ الأحداث: | Date Created: 20210903 Latest Revision: 20210903 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1107/S1600577521005981 |
| PMID: | 34475296 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1600-5775 |
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| DOI: | 10.1107/S1600577521005981 |