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  • Articles  (80)
  • Analytical Chemistry and Spectroscopy  (80)
  • 1970-1974  (80)
  • Physics  (80)
  • Energy, Environment Protection, Nuclear Power Engineering
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  • Articles  (80)
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  • 1
    Electronic Resource
    Electronic Resource
    Light scattering of transition metal ions. II: Correlation of electronic Raman transitions and magnetic susceptibilitiesResearch supported by the National Resarch Council of Canada. (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 489-498 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Electronic Raman transitions to levels of divalent cobalt and iron ions of the compounds CoF2, Co2GeO4 and FeF2, Fe2GeO4 are discussed. From the position and wave functions of the low lying electronic levels it is possible to calculate the magnetic susceptibility of these compounds. Our calculations suggest that a reasonable agreement exists between the calculated value from the Raman spectra and the measured values of Zm as function of the temperature of the samples.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010507
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  • 2
    Electronic Resource
    Electronic Resource
    A spectroscopic study of vibrations in crystalline compounds [Me(NH3)6] X2 (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 185-196 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Infra-red and Raman spectra of [Me(NH3)6]X2 crystals were measured for Me = Co, Ni and X = Cl, Br, I. BF4, ClO4, PF6. The bands obtained were interpreted as being connected with vibrations of the [Me(NH3)6] octahedron. A far infra-red band at ca. 80 cm-1 was interpreted as an IR active lattice mode. A lattice dynamics model based on electrostatic interactions between point ions was developed. A low frequency Raman active lattice mode was theoretically foreseen by this model.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010206
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  • 3
    Electronic Resource
    Electronic Resource
    X-ray fluorescence analysis  -  results of a first round intercomparison study (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 47-50 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The results are presented of an intercomparison study between twelve investigators and three analytical techniques. The objective was to determine the precision and accuracy with which multi-element analysis of air particulates on filters can be accomplished using energy dispersive X-ray fluorescence spectrometry. Special emphasis was placed on testing calibration techniques and methods of correction for absorption in both particulate deposits and substrates. Results indicate that errors in calibration and correcting for substrate absorption can be reduced to much less than 10% for elements K and above, but the more work is required to test methods of correcting for particles size to achieve 10% accuracy at energies below 3 keV.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300030110
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  • 4
    Electronic Resource
    Electronic Resource
    Quantitative analysis with an energy-dispersive detector using a pulsed electron probe and active signal filtering (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 153-158 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The pulsed beam technique has been used to achieved a high data acuumulation rate in an energy-dispersive analytical system consisting of an electron probe analyser and the Harwell ‘Highspec’ pulse analyser system 3074. The use of fast beam switching ( ∼ 30 ns transient time) and the special timing facilities available in the Harwell equipment reduce the spectrum contamination due to displacement of the probe during switching to a low level and also provide precise measurements of live time, essential for accurate analysis. Analyses performed at spectrum accumulation rate of up to 12 kP.P.S. shows agreement with accepted values to within ± 1% for major constituents. Simple modification of the system permits accumulation rates up to 25 kP.P.S.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300030407
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  • 5
    Electronic Resource
    Electronic Resource
    Raman spectral studies of cis-2-butene-benzene mixtures (1974)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 2 (1974), S. 593-607 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of neat liquid cis-2-butene and cis-2-butene-benzene mixtures, covering the accessible composition range at 20°C and atomospheric pressure, have been obtained. Parameters of the benzene bands at 605.6, 1178 and 991.6 cm-1 and cis-2-butene bands at 395.5, 871.5 and 1660 cm-1 are reported. Changes in the parameters as a function of concentration are interpreted in terms of a weak dipole-induced dipole interaction and the consequent effect on rotational motions and resonance energy transfer.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250020607
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  • 6
    Electronic Resource
    Electronic Resource
    Raman studies of nucleic acids. IX: A salt-induced structural transition in poly(rG) (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 207-215 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Raman spectra of poly(rG), obtained from neutral aqueous solutions containing excess sodium counterions, are qualitatively different than spectra obtained from salt-free solutions. In the presence of a two-fold molar excess of Na+ (per phosphate group) the Raman spectrum of poly(iG) closely resembles that of the gel of Guo-5′-P and is characteristic of an ordered helical structure in which guanine residues are hydrogen bonded to one another. In the absence of added salt the spectrum of poly(rG) is characterized by unusual guanine ring frequencies which suggests a tautomeric or ionic modification of the ordinary (keto-amino) ring structure. Both the high-salt and no-salt forms of poly(rG) represent stable secondary structures as evidenced by the conformationally sensitive phosphodiester frequencies and by the absence of significant spectral changes on heating the solutions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010208
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  • 7
    Electronic Resource
    Electronic Resource
    The on-stream analysis of hematite ore fractions using radioisotopesMineral Sciences Division, Report MS-PP 73-8. (Crown Copy-rights reserved). (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 15-20 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Hematite ore fractions in the form of circulating slurries of various solids content were analyzed for iron and silicon, their principal metallic constituents, to determine the relationships and factors significant to such analyses. Radioisotopes were used to excite the characteristic radiations which were measured nondispersively. Counts were also taken for the exciting radiations.The measured intensities for Fe Kα and Si Kα were corrected by backscatter and absorption factors derived by the comparison of counts from the slurries to those from water. Regression lines were used to convert all counts to a 40% solid basis.The iron content of the ore fractions was determined with a standard error of less than 2%. The determination of silicon was not satisfactory at low concentrations because all components of the slurries absorb Si Kα strongly.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300030104
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  • 8
    Electronic Resource
    Electronic Resource
    A new method for first order line interference correction in X-ray spectrochemical analysis. Application to the analysis of geological samples (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 3 (1974), S. 130-132 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A mathematical procedure used for correcting the interference between two nearest first order overlapping lines is described. The intensity of the ‘composite’ peak is assumed to be a linear superposition of the individual components; the shift in angular position of the sample. The proposed method is based on the dependence existing between the different parameters involved, which can be represented by a mathematical relationship of the [Ri]=[kij] [Cj], where Ri is the observed intensity, measured at the theoretical 2θ values for the elements involved, Kji are characteristic constants of the angular position and Cj the concentration of the elements.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300030309
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  • 9
    Electronic Resource
    Electronic Resource
    Improvement of the stray light figure of a modified cary 81 (1973)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 1 (1973), S. 321-323 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250010402
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  • 10
    Electronic Resource
    Electronic Resource
    Automation techniques for Raman spectroscopy (1974)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 2 (1974), S. 53-69 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: This paper is concerned with the automation and control of grating spectrometers by digital techniques. The methods outlined include: a simple manually operated digital control; a dedicated logic system with data storage; data acquisition and control systems run by a computer in real-time and time-sharing modes. The performance of these methods is evaluated. A basic spectrometer control unit is described; this unit forms a module around which more general spectrometer control systems may be constructed.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250020105
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