title: Electron yield soft X-ray photoabsorption spectroscopy under normal ambient-pressure conditions.
abstract: Ambient-pressure soft X-ray photoabsorption spectroscopy (XAS) was demonstrated to be applicable to the chemical analysis of hydrated transition-metal compounds. For this purpose, even under ambient-pressure conditions, electron yield detection XAS (EY-XAS), based on a simple drain-current set-up, was used to overcome a weakness in fluorescence yield detection XAS (FY-XAS), which does not give a pure soft XAS. The feasibility of EY-XAS was investigated and it was clarified that the EY-XAS under ambient-pressure conditions corresponds to the mixed data of the total EY and conversion EY spectra. Normal ambient-pressure EY-XAS analysis was applied to anhydrous (CoCl2) and to hydrated (CoCl2·6H2O) cobalt chloride at the Co L23-edge. The present measurements demonstrated the ability to unambiguously distinguish the different chemical states of cobalt ions, relying upon spectral differences that indicate octahedral/quasi-octahedral structural changes as a result of hydration/dehydration reactions.
authors.affiliation: Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo, Hyogo, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Tamenori
mesh_terms: D000399:Air Pressure; D003035:Cobalt / Q000032:analysis* / Q000737:chemistry; D004583:Electrons; D004867:Equipment Design; D019544:Equipment Failure Analysis; D056951:Photoelectron Spectroscopy / Q000295:instrumentation*; D017356:Synchrotrons / Q000295:instrumentation*
chemical_list: D003035:Cobalt; C018021:cobaltous chloride
keywords: conversion electron yield detection; electron yield detection; hydration; normal ambient pressure; soft X-ray photoabsorption spectroscopy