Results 101 to 110 of about 170,202 (163)

Calculations of effective atomic number

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
We will present and discuss effective atomic number (Zeff) obtained by different methods of calculations. There is no unique relation between computed values. This observation led us to the conclusion that any Zeff is valid only for given process. We will compare Zeff obtained by following methods: 1. Variational method (Slater), 2.
Kaliman, Zoran   +2 more
openaire   +4 more sources

The effective atomic number of mix D

The British Journal of Radiology, 1979
It is well known that mix D, which was introduced by Jones and Raine (1949), has been widely used as a phantom material for photons and electrons in radiotherapy. By adding fillers of magnesium oxide and tianium dioxide to wax, they made an improvement for mix D compared with wax alone in terms of mechanical properties and the attenuation ...
T, Hiraoka, K, Kawashima
openaire   +2 more sources

The effective atomic number of dosimetric gels

Australasian Physics & Engineering Sciences in Medicine, 2008
Radiological properties of gel dosimeters and phantom materials are often compared against each other and against water or tissue by consideration parameters including their effective atomic number, Zeff. Effective atomic numbers have been calculated for a range of ferrous-sulphate and polymeric gel dosimeters using mass attenuation coefficient data ...
Taylor, M   +3 more
openaire   +3 more sources

X-ray energies for effective atomic number determination

Neuroradiology, 1976
The measurement of the effective atomic number of a piece of material in vivo can be achieved using computed tomography. The precision of measurement of this parameter depends on the precision of measurement of the X-ray absorption coefficient at two energies and the separation of these energies.
R A, Rutherford   +2 more
openaire   +2 more sources

Determination of atomic cross-sections and effective atomic numbers for some alloys

Annals of Nuclear Energy, 2000
Abstract The transmission of gamma-rays at the energies, 81, 356, 511, 662, 835, 1274 and 1332 keV has been studied on the alloys brass, bronze, steel, aluminum–silicon and lead–antimony. The mass absorption coefficients have been measured. The total interaction cross-sections and effective atomic numbers have been determined on the basis of mixture ...
A.H. El-Kateb   +2 more
openaire   +1 more source

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