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  • 1990-1994  (5)
  • Chemistry  (4)
  • 33.20 Lg  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Ultraviolet bands of Na2 and K2 (1991)
    Springer
    The European physical journal 18 (1991), S. 379-382 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 33.20 Lg ; 35.80 + s
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The ultraviolet spectra of Na2 and K2 molecules have been investigated. These studies were made in absorption in the second order of a 3.4 m Ebert Spectrograph with a reciprocal dispersion of 2.6 Å/mm. A number of new bands in the spectra of both the molecules not previously reported have been observed. Computer methods have been used to calculate the term values and to evaluate molecular constants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01426601
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  • 2
    Digitale Medien
    Digitale Medien
    Characterization of materials by chemical shift of x-ray absorption edges (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 21 (1992), S. 83-85 
    Details
    ISSN: 0049-8246
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: A simple method for the determination of the composition of compounds and alloys by using the data for chemical shifts of x-ray absorption edges is suggested. It is found that the calculated compositions of compounds are in good agreement with standard composition values.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/xrs.1300210207
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  • 3
    Digitale Medien
    Digitale Medien
    X-ray K-absorption edge studies in a-Ga30Se70 and a-Ga30Se70 - xInx (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 21 (1992), S. 193-195 
    Details
    ISSN: 0049-8246
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: The shift of the K-absorption edge (ΔEk) was measured in ternary alloys of Ga30Se70-xInx (x = 0, 5, 10, 15, 20) with respect to the binary Ga30Se70 alloy. It was observed that the K-edge of selenium shifted progressively towards the lower energy side as the indium concentration increased from 0 to 10 at.%. However, at higher concentrations, the relative shift started to decrease. These results are in accordance with Pauling's concept of electronegativity and indicate that the nature of the bond is iono-covalent in these glasses, as found in many crystalline solids. The composition dependence of the edge shift is also discussed in terms of the structure of the Se—Ga system.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/xrs.1300210409
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  • 4
    Digitale Medien
    Digitale Medien
    Study of K-absorption edge of selenium in the glassy semiconducting Se100-xInx system (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 19 (1990), S. 27-28 
    Details
    ISSN: 0049-8246
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: The shift of the K-absorption edge (δEk) was measured in Se100-xInx binary system where 0 ≤x ≤ 30. The K-edge of Se progressively shifted toward the lower energy side as the In concentration increased from 0 to 15 at.-%. However, at higher concentrations, the relative shift started to decrease. The results are in accordance with Pauling's concept of electronegativity and indicate that the nature of the bonds is iono-covalent in these glasses, as found in many crystalline solids. The composition dependence of the edge shift is also discussed in terms of the structure of Se.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/xrs.1300190106
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  • 5
    Digitale Medien
    Digitale Medien
    Structural studies of glassy semiconducting Se80 - xTe20Inx alloys (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 19 (1990), S. 243-245 
    Details
    ISSN: 0049-8246
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: The shift of the K-absorption edge (ΔEK) was measured in Se80-xTe20Inx, where 0 ≤ x ≤ 20. It is observed that the K-edge of Se shifts progressively towards the lower energy side as the In concentration increases from 0 to 15 at.-%. However, at higher concentrations, the relative shift starts to decrease. The results are in accordance with the Pauling concept of electronegativity and indicate that the nature of the bonds is iono-covalent in these glasses, as found in many crystalline solids. The composition dependence of the edge shift is also discussed in terms of the structure of the Se-Te system.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/xrs.1300190508
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