X-ray absorption spectroscopy of Ce2O3+ and Ce2O5+ near Ce M-edge. (16th March 2016)

• Record Type: Journal Article
• Authors: Hayakawa, Tetsuichiro; Egashira, Kazuhiro; Arakawa, Masashi; Ito, Tomonori; Sarugaku, Shun; Ando, Kota; Terasaki, Akira
• Is Part Of: Journal of physics. Volume 49:Number 7(2016:Apr. 01)
• Publication Date: 2016-03-16
• Subjects: cerium oxide clusters -- x-ray absorption spectroscopy -- charge state -- ion trap -- ion spectroscopy; 33.20.Rm -- 36.40.Cg -- 37.10.Ty; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/49/7/075101
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: X-ray absorption spectroscopy (XAS) of size-selected free cerium-oxide cluster ions has been carried out by employing an ion trap. X-ray absorption spectra of and were obtained in the energy range of the Ce M-edge. The spectra consisted of two prominent peaks corresponding to Ce M5 - and M4 -'white line' peaks. The photon energies of the peaks showed that the charge state of Ce in was comparable with a formal valence number. On the other hand, the estimated charge state of Ce in was much smaller than a formal valence number, which was consistently understood by assuming that has a Ce2 O3 –O2 configuration with a molecular O2 adsorbed. It was thus demonstrated that an ion trap facilitates XAS measurement for determining charge states of atoms in a free cluster.