Evolutions in Photoelectric Cross Section Calculations and Their Validation

The LIII subshell photoelectric cross section, jump ratio, jump factor, and Davisson–Kirchner ratio of iridium have been determined by mass attenuation coefficients. The measurements have been performed using the X-ray attenuation method in narrow beam geometry. The obtained results have been compared with the tabulated values of XCOM (Berger et al. XCOM: Photon cross section database (version 1.3). NIST. Available at http://physics.nist.gov/xcom . 2005) and FFAST (Chantler et al. X-ray form factor, attenuation and scattering tables (version 2.1). NIST. Available at http://physics.nist.gov/ffast . 2005).

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LOW ENERGY PHOTOELECTRIC CROSS SECTION CALCULATIONS. VOLUME II. PROGRAM DESCRIPTION

10.21236/ad0840382 ◽

1967 ◽

Cited By ~ 12

Author(s):

Henry Brysk ◽

Arnold Glick

Keyword(s):

Cross Section ◽

Low Energy ◽

Photoelectric Cross Section ◽

Program Description

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Interpretation of wireline log and core data from a mid-Jurassic sand/shale sequence

Clay Minerals ◽

10.1180/claymin.1984.019.3.15 ◽

1984 ◽

Vol 19 (3) ◽

pp. 483-505 ◽

Cited By ~ 9

Author(s):

R. C. A. Peveraro ◽

K. J. Russell

Keyword(s):

Bulk Density ◽

Mineral Composition ◽

Cross Section ◽

Atomic Number ◽

Clay Content ◽

Single Factor ◽

Reservoir Rocks ◽

Wireline Logs ◽

Photoelectric Cross Section ◽

Source Of Information

AbstractInterpretation of downhole wireline logs is generally a major source of information used to build up a picture of the quality and distribution of reservoir rocks. Logging tools respond to a number of variables and comparison of a suite of different logs is usually required to isolate and identify the response due to a single factor, e.g. porosity or clay content. A new tool, the litho-density tool (LDT), has been used along with conventional logging tools in a mid-Jurassic sand/shale sequence. The LDT simultaneously measures Pe (effective photoelectric cross-section) and ρa (apparent bulk density). Pe is a function of atomic number which in turn reflects lithology or mineral composition. By using cross-plots derived from the LDT and other logs, patterns of mineral abundance are indicated.

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Total-to-K-shell photoelectric cross-section ratios in some rare-earth and high-Z elements

Canadian Journal of Physics ◽

10.1139/p89-022 ◽

1989 ◽

Vol 67 (2-3) ◽

pp. 139-142 ◽

Cited By ~ 1

Author(s):

S. Chandra Lingam ◽

K. Suresh Babu ◽

V. Prakash Kumar ◽

D. V. Krishna Reddy

Keyword(s):

Rare Earth ◽

Cross Section ◽

Atomic Number ◽

Cross Sections ◽

Cross Section Ratio ◽

Section Ratio ◽

Photoelectric Cross Section ◽

Normal Transmission ◽

Experimental Values ◽

Good Agreement

The total photoelectric cross-sections in the elements gadolinium, dysprosium, erbium, lutetium, tantalum, tungsten, gold, and lead have been obtained by using the normal transmission experiments, and the results are reported. Using these total photoelectric cross sections, we have found the K-shell photoelectric cross sections, the K-jump ratios, and the total-to-K-shell photoelectric cross-section ratios at the K edges for the above elements. These values are compared with the available theoretical and experimental values. The results are in good agreement with the Storm and Israel results and the Scofield theoretical values, within the limits of experimental uncertainties. Furthermore, the variation of the total-to-K-shell photoelectric cross-section ratio with energy and atomic number is discussed.

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