Atomic origin of 3d94 f 1 configuration in La3+ solids. (24th September 2015)

• Record Type: Journal Article
• Authors: Yu, S-W; Carpenter, M H; Ponce, F; Friedrich, S; Lee, J-S
• Is Part Of: Journal of physics. Volume 27:Number 40(2015)
• Publication Date: 2015-09-24
• Subjects: scintillator -- x-ray absorption and emission -- electronic structure; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/40/405501
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We have studied the excited electronic structure of LaBr3 (Ce) scintillator by soft x-ray spectroscopy such as x-ray absorption spectroscopy (XAS) and x-ray emission spectroscopy (XES). The La 3 d XAS and XES spectra of LaBr3 (Ce) are compared with those of other La 3+ solids (LaF3, La2 O3, and La metal). From this comparison, it turns out that the La 3 d XAS and XES spectra from all the La 3+ solids considered here appear at almost the same energy, even though the corresponding binding energies of the 3 d core holes determined by XPS (x-ray photoelectron spectroscopy) are very different. As a result, we argue that the atomic nature of the configuration created by x-ray absorption process in La 3+ solids is maintained via the localized 4 f 1 state, which screens the 3 d core holes differently from one La 3+ solid to another.