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A Bayesian spectroscopy technique is proposed to decompose weak pre‐edge structures from an X‐ray absorption near edge structure (XANES) spectrum. This methodology can perform model selection based on an information criterion of Bayes free energy. To explain the entire XANES spectrum measured at Fe K‐edge of α‐Fe2O3 with a partial fluorescence yield method, a phenomenological model of an absorption...
By using Bayesian spectroscopy, we studied polarization dependence of photoluminescence (PL) spectra in doubly‐split 1S yellow ortho‐excitons in a Cu2O thin‐crystal recrystallized in a small gap between paired MgO substrates. In these thin‐crystals, biaxial stresses are expected to be involved due to a small lattice mismatch between Cu2O and MgO. Under a planar‐isotropic biaxial stress, the cubic...
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