A study of transferability of atomic background on EXAFS spectra of simple gaseous compounds of As.
نویسندگان
چکیده
From EXAFS spectra of As and As2O3 vapors and arsine gas AsH3 the ab initio calculated structural signal is removed. The remainders comprise small absorption edges due to shake-up channels involving electrons from 3d or 3p subshell. With enhanced resolution, the edges reveal a fine splitting and a varying contribution of resonance channels, due to individual molecular energy-level structure of the samples. On the resolution level appropriate for routine EXAFS analysis the remainders coincide, representing a unique and transferable atomic absorption background for the range of As valence states spanned by the samples.
منابع مشابه
Atomic background and EXAFS of gaseous hydrides of Ge, As, Se and Br.
K edge absorption spectra of elements from Ge to Br in gaseous hydrides were measured at the BM 29 station of ESRF with noise level as low as 2x10(-5), so far achievable only on noble gases. The dominant feature of the spectra is the atomic background similar to that of Kr and comparable to it in the quality of detail. Onto the background, a smooth weak EXAFS signal due to the hydrogen neighbor...
متن کاملمطالعه تغییرات شمیایی و ساختمانی سولفیدهای نقره و مس توسط SRS (مطالعه‌ای از کاربردهای سینکروترون بر مبنای XAS در کانی‌شناسی- بلورشناسی و ژئوشیمی)
The ABS2 sulphides (A=Cu, or Ag), B=As, Sb, Bi) are a naturally occurring group of minerals, typically found in polymetallic vein deposits. Behind chemically simple, the minerals have a complex structure and undergo several temperature/composition phase transitions. In this study, synchrotron radiation is used to collect Ag, As, Bi, Cu, Cd, Hg and Sb K-edge EXAFS data from a series of synthetic...
متن کاملAB Initio Calculations of NMR Spectra for H20114C9N4 As A New Nanosemiconductor Molecule
BCN compounds have been researched theoretically and experimentally widely. In this paper, weintroduce the theoretical prediction of ternary B-C-N compounds. NMR spectroscopy was employedextensively to study these ternary nanostructures. We discuss the utilization of chemical shiftinformation as well as ab initio calculations of nuclear shielding for H20134C9N4 structuredetermination. We calcul...
متن کاملحذف فتوکاتالیستی فرمالدئید از هوا با استفاده از نانوکامپوزیت اکسید تیتانیوم- اکسید گرافن احیاء شده
Background and Objective: Formaldehyde is a toxic volatile organic compound, which its removal from polluted air is essential. One of the techniques available for removing such compounds is photocatalytic degradation. The aim of this study was to investigate the photocatalytic degradation of gaseous formaldehyde on TiO2 nanoparticles coated on reduced graphene oxide Materials and Methods...
متن کاملPerceived Pragmatic Transferability of Persian L1 Refusal Strategies
Investigating transfer of one’s pragmatic knowledge of first language to his second or foreign language has been one of the areas of interest for researchers. However, there are contradictory results even within the scarce studies which have addressed transferability. This study was an attempt to investigate perceived pragmatic transferability of L1 refusal strategies by Persian EFL learners. S...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of synchrotron radiation
دوره 8 Pt 2 شماره
صفحات -
تاریخ انتشار 2001