Photon cross sections and effective atomic numbers in some alloys

1985 ◽  
Vol 63 (11) ◽  
pp. 1421-1424 ◽  
Author(s):  
D. V. Krishna Reddy ◽  
K. Suresh Babu ◽  
S. Chandra Lingam
Keyword(s):  
Stainless Steel ◽  
Cross Sections ◽  
Scintillation Detectors ◽  
Medium Energy ◽  
Subtraction Method ◽  
Scattering Cross ◽  
Effective Atomic Numbers ◽  
Scattering Cross Sections ◽  
Good Agreement

The total photon cross sections in five nickle-based alloys, viz., Superimphy, Inconel, Nimonic-90, Invar, and stainless steel, are measured at photon energies of 32.1, 52.0, 72.1, 84.3, 145.4, 279.2, 320.0, and 661.6 keV in a good geometric setup using two NaI(Tl) scintillation detectors for low- and medium-energy photons. Experimental total photon cross sections are compared with the theoretical values of Storm and Israel and good agreement is found. Using the subtraction method, we obtain photoelectric and scattering cross sections at appropriate photon energies and compare them with the available theoretical values. The total and partial effective atomic numbers are obtained and presented.

Gamma-ray cross sections and effective atomic numbers in some alloys in the energy range 32 to 662 keV

1984 ◽  
Vol 62 (2) ◽  
pp. 178-182 ◽  
Author(s):  
K. Suresh Babu ◽  
S. Chandra Lingam ◽  
D. V. Krishna Reddy
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Experimental Error ◽  
Gamma Ray ◽  
Scintillation Detectors ◽  
Medium Energy ◽  
Subtraction Method ◽  
Total Attenuation ◽  
Effective Atomic Numbers ◽  
Scattering Cross Sections

Total attenuation cross sections in four alloys, telphy, dilver P, anhyster DS, and anhyster M, at 32.1, 52, 72.1, 84.3, 145.4, 279.2, and 661.6-keV photon energies are measured in a good geometry setup using two NaI(Tl) scintillation detectors for low and medium energy photons. Experimental total attenuation cross sections are compared with the theoretical values of Storm and Israel and found to be within experimental error. Using the subtraction method, photoelectric and scattering cross sections are obtained at appropriate photon energies and compared with theoretical values. The effective atomic numbers for photoelectric and total gamma-ray interactions are derived and their variation with energy is discussed.

Calculation of gas-kinetic radius and van der Waals coefficient from electron scattering cross-sections

2021 ◽  
pp. 82-86
Author(s):  
Akash Kumar ◽  
Biplab Goswami
Keyword(s):  
Gas Phase ◽  
Electron Impact ◽  
Electron Scattering ◽  
Cross Sections ◽  
Analytical Approach ◽  
Van Der Waals ◽  
Scattering Cross ◽  
Environmentally Sensitive ◽  
Scattering Cross Sections ◽  
Good Agreement

The gas-kinetic radius (r) and van der Waals coefficient (b) are two usable quantities for characterizing the motion of any molecules in the gas phase. In this article, comprehensive calculations of r and b of various environmentally sensitive molecules like SF6, NF3, GeF4, Si2H6 and Cl2O are reported. In the present study, an analytical approach for calculations of r and b was used from the electron impact cross-sections data of these molecules. In general, the reported values of r and b shows good agreement with the previous theories and experiments.

Absolute inner-shell cross section determination for EELS analysis

1988 ◽  
Vol 46 ◽  
pp. 534-535
Author(s):  
P.A. Crozier
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Absolute Cross Section ◽  
Specimen Thickness ◽  
Mass Thickness ◽  
Scattering Cross ◽  
Before And After ◽  
Estimated Error ◽  
Scattering Cross Sections ◽  
Electron Microscopist

Absolute inelastic scattering cross sections or mean free paths are often used in EELS analysis for determining elemental concentrations and specimen thickness. In most instances, theoretical values must be used because there have been few attempts to determine experimental scattering cross sections from solids under the conditions of interest to electron microscopist. In addition to providing data for spectral quantitation, absolute cross section measurements yields useful information on many of the approximations which are frequently involved in EELS analysis procedures. In this paper, experimental cross sections are presented for some inner-shell edges of Al, Cu, Ag and Au.Uniform thin films of the previously mentioned materials were prepared by vacuum evaporation onto microscope cover slips. The cover slips were weighed before and after evaporation to determine the mass thickness of the films. The estimated error in this method of determining mass thickness was ±7 x 107g/cm2. The films were floated off in water and mounted on Cu grids.

scholarly journals Towards fully nonperturbative computations of inelastic ℓN scattering cross sections from lattice QCD

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
Hidenori Fukaya ◽  
Shoji Hashimoto ◽  
Takashi Kaneko ◽  
Hiroshi Ohki
Keyword(s):  
Lattice Qcd ◽  
Cross Sections ◽  
Scattering Cross ◽  
Scattering Cross Sections

scholarly journals Combining ADF-EDX scattering cross-sections for elemental quantification of nanostructures

2021 ◽  
Vol 27 (S1) ◽  
pp. 600-602
Author(s):  
Zezhong Zhang ◽  
Annick De Backer ◽  
Ivan Lobato ◽  
Sandra Van Aert ◽  
Peter Nellist
Keyword(s):  
Cross Sections ◽  
Scattering Cross ◽  
Scattering Cross Sections

Total electron scattering cross-sections for carbon monoxide at low electron energies

Pramana ◽  
1998 ◽  
Vol 51 (3-4) ◽  
pp. 453-461 ◽  
Author(s):  
P. Rawat ◽  
K. P. Subramanian ◽  
Vijay Kumar
Keyword(s):  
Carbon Monoxide ◽  
Electron Scattering ◽  
Cross Sections ◽  
Total Electron ◽  
Scattering Cross ◽  
Scattering Cross Sections
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