Sc Kα, and Kβ X-ray fluorescence spectra

Kawai, Jun; Nakamura, Eisaku; Nihei, Yoshimasa; Fujisawa, Kenji; Gohshi, Yohichi

doi:10.1016/0584-8547(90)80122-y

Cited by 41 publications

(28 citation statements)

References 39 publications

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“…Here, we use the center energy of the full width at 9 10 of the K␣ peak maxima. 17 The Si K␣ spectra of Mg 2 Si shifted to lower energy ͑−0.14 eV͒, while the chemical shift of the Si K␣ spectra in CaSi was small, but positive ͑+0.03 eV͒. The chemical shift of CaSi 2 was also positive ͑+0.01 eV͒, but almost 0.…”

Section: Resultsmentioning

confidence: 88%

Effective charge on silicon atom in the metal silicidesMg2Siand CaSi

et al. 2005

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The effective charges of Si in both magnesium ͑Mg 2 Si͒ and calcium silicides ͑CaSi and Ca 2 Si͒ have been investigated by measuring high-resolution Si K␣ x-ray fluorescence spectra. CaSi showed small but positive chemical shifts ͑+0.03 eV͒, while the chemical shift of Mg 2 Si was negative ͑−0.14 eV͒, as expected from their electronegativity ͑Ca: 1.00; Mg: 1.31; Si: 1.90͒. The similarity of the chemical shift for the Fe silicides and the calculations for the free single Si atom suggested that the effective charge of Si for CaSi was positive. From the observations the effective charges on Si in CaSi and Mg 2 Si were estimated to be +0.1 and −0.3 electrons. The discrete variation Hatree-Fock-Slater calculations for Mg 2 Si and CaSi also showed opposite chemical shifts and effective charges: −0.09 eV and −0.35 electrons for Mg 2 Si and +0.09 eV and +0.26 electrons for CaSi, respectively. The composition of the nearest-neighbor atoms of Si, which are Si in CaSi and Mg in Mg 2 Si, cause the opposite effective charges between the two silicides.

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Section: Resultsmentioning

confidence: 88%

Effective charge on silicon atom in the metal silicidesMg2Siand CaSi

et al. 2005

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“…In general, X-ray emissions accompanied by outer-shell → core (OC) transitions show larger chemical effects than those accompanied by inner-shell → core transitions [1,8,11,15]. Hence, it is, in principle, more effective to apply OC emissions to selective XAFS spectroscopy.…”

Section: Introductionmentioning

confidence: 98%

“…Chemical effects on X-ray emissions [1][2][3][4][5][6][7][8][9][10][11] can be employed for chemical state analysis or characterization of materials [2,9,10]. Recently, the effects are noticed also as the basis of selective X-ray absorption fine structure (XAFS) spectroscopy [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 98%

Chemical effects on valence→L emissions of lanthanide compounds

Hayashi

Okada

2009

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…The X-ray K emission spectra in a wide range of elements and their compounds are still of interest for many authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and many interesting features of those spectra have been found so far. In particular, in different substances containing transition metals, the satellites on the low energy side of the main K b peak have been observed.…”

Section: Introductionmentioning

confidence: 99%