Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Measurement of L and M shell x-ray production cross-sections by 6 keV photon (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 14 (1985), S. 195-198 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The cross-sections for the production of L and M shell x-rays in some elements by 5.959 keV photons have been measured in order to provide data for use in photon-induced x-ray fluorescence analysis. An attempt has been made to interpret the experimental data in terms of the theoretical sub-shell photoionization cross-sections, fluorescence and Coster-Kronig yields wherever available. In general, an agreement between the experimental and calculated values was found for the L shell. However, for the M shell, sufficient data for comparison were not available.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300140412
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Quantitative analysis of binary mixtures using a simple x-ray fluorescence technique (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 16 (1987), S. 37-39 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method is described for the quantitative analysis of binary mixtures using a simple x-ray fluorescence technique. It requires neither special preparation of thin samples nor corrections for absorption and enhancement effects. Enhancement effects are avoided using selective excitation and absorption is estimated in terms of intensities of the measured x-rays. Linear calibrations requiring the use of only two standards are obtained. The application of the method is illustrated with six different binary mixtures.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300160109
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Ll, Lα, Lβ and Lγ X-Ray Production Cross-Sections in Elements 57 ≤ Z ≤ 92 by 8-50 ke V Photons (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 23 (1994), S. 208-217 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Cross-sections for the production of Ll, Lα, Lβ and Lγ x-rays in 22 elements (57 ≤ Z ≤ 92) by photons of 13 different energies in the range 8-50 ke V are reported. The experimental values of the cross-sections were determined by measuring the absolute yield of L subshell x-rays emitted from a target of a given element and thickness when it was bombarded with a known flux of photons of given energy. The theoretical values of the cross-sections were calculated from the theoretical/semi-empirical values of subshell photoionization cross-sections, fluorescence yields, Coster-Kronig transition probabilities, intra-shell transition probabilities and radiative decay rates. The present and previous measured and calculated values of the cross-sections are tabulated to bring out the existing status of L x-ray production cross-sections.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300230505
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Investigation of M x-ray emission following photoionization of L and M shell electrons in high-Z-elements (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 24 (1995), S. 9-12 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The cross-sections of M x-ray emission following photoionization of L and M shell electrons in Au, Pb, Th and U by 59.57 ke V gamma rays were measured. The experimental values of cross-sections were found to be higher than those calculated from the theoretical values of L and M shell photoionization cross-sections, the Li subshell to M shell vacancy transfer probabilities and M shell average fluorescence yields. The transfer of vacancies from the Li subshell to the M shell was found to play a significant role in M x-ray emission. The present status of the experimental and calculated values of the cross-sections is discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300240104
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Sample analysis using gamma ray induced fluorescent x-ray emission (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 12 (1983), S. 19-22 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A non-destructive method for the analysis of materials using gamma ray-induced fluorescent x-ray emission has been developed. In this method, special preparation of very thin samples in which the absorption of the incident gamma rays and the emitted fluorescent x-rays is negligible, is not needed, and the absorption correction is determined experimentally. A suitable choice of the incident gamma ray energies is made to minimise enhancement effects through selective photoionization of the elements in the sample. The method is applied to the analysis of a typical sample of the soldering material using 279 keV and 59.5 keV gamma rays from 203Hg and 241Am radioactive sources respectively. The results of the analysis are found to agree well with those obtained from the chemical analysis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300120106
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Determination of potassium and calcium in vegetables by x-ray fluorescence spectrometry (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 22 (1993), S. 413-417 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: A method based on XRF was used for the determination of the total concentration of potassium and calcium, in the presence of each other and irrespective of the nature of their chemical compounds, in the roots and leaves of spinach and radish plants. The enhancement of potassium K x-rays due to K x-rays of calcium present in the samples was avoided by selective excitation of the sample with external conversion calcium K x-rays in a compact triaxial double reflection geometry set-up. The absorption of calcium and potassium K x-rays in the samples was taken care of in terms of counts under K x-ray peaks only. The overlapping of the calcium K x-ray photopeak with the potassium K x-ray photopeak due to the limited resolution of the Si(Li) spectrometer was estimated and counts under the calcium K x-ray photopeak were corrected accordingly. The results for whole plants of spinach and radish agreed with those normally quoted in nutrition books.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300220609
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...