Results 121 to 130 of about 170,202 (163)

Systematic atomic number effects in complexes exhibiting ligand luminescence

Spectrochimica Acta Part A: Molecular Spectroscopy, 1973
Abstract A thorough examination has been made of the room temperature emission properties of a large number of diamagnetic closed shell metal complexes exhibiting luminescence localized in the ligand. The data reported are for 8-quinolinolates and include absorption spectra, emission spectra, excitation spectra, quantum yields and luminescence ...
F.E. Lytle, D.R. Storey, M.E. Juricich
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Effective atomic numbers for some calcium–strontium-borate glasses

Annals of Nuclear Energy, 2012
Abstract Effective atomic number acts as a fundamental property of compounds and mixtures and it plays a vital role in the computation of various dosimetric parameters such as buildup factor, effective dose and heat generation. Effective atomic numbers have been computed in the energy range from 1 keV to 100 GeV for different chemical compositions of
Renu Sharma, Vandana Sharma, Parjit S. Singh, Tejbir Singh   +3 more
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Systematic atomic number effects in complexes exhibiting ligand luminescence

Analytica Chimica Acta, 1979
Abstract The room-temperature fluorescence properties of Group IIIA metal complexes with salicylidene- o -aminophenol (S o AP) in aqueous 20% methanol are reported. The data include absorption, emission and excitation maxima, quantum yields and luminescence lifetimes.
T.L. Craven, F.E. Lytle
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Effective atomic numbers for CoCuNi alloys using transmission experiments

Journal of Quantitative Spectroscopy and Radiative Transfer, 2005
Abstract Effective atomic numbers for CuCoNi alloys against changing Ni contents were measured in the X-ray energy range from 15.746 to 40.930 keV. The gamma rays emitted a 241 Am point source have been send on absorbers to be used transmission arrangement. The X-rays were counted by a Si(Li) detector with a resolution of 160 eV at 5.9 keV.
Karahan, IH, Erzeneoglu, Salih Zeki, Icelli, O, Cankaya, G   +3 more
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Odd-even effects for number of atoms in antiferromagnetic atomic chains on ferromagnetic substrate

Physics of the Solid State, 2010
The ground state of an antiferromagnetic atomic chain on a ferromagnetic substrate has been studied taking into account the single-ion anisotropy energy. Qualitatively different behavior of even and odd atomic chains has been demonstrated. A phase diagram in terms of chain length-ferromagnet exchange field has been constructed.
A. A. Berzin, A. I. Morosov, A. S. Sigov
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Determination of effective atomic numbers, effective electrons numbers, total atomic cross-sections and buildup factor of some compounds for different radiation sources

Radiation Physics and Chemistry, 2017
Abstract The photon interaction parameters such as mass attenuation coefficient, effective atomic number, effective electron density, buildup factor have been measured for Fe(NO3)3, V4O2, NaCO3·H2O, C6H5FeO7·H2O and CuCI compounds using 137Ba, 157Gd and 241Am γ-rays sources in stable geometry.
Levet, Aytaç, Özdemir, Yüksel
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Effective atomic number rule to exchange energy

1995
This chapter assesses the effective atomic number rule. The effective atomic number rule applies to molecules where covalent bonding is strong and all the valence orbitals are being used in either homo- and hetero-polar covalent bonds or are occupied by non-binding electron-pairs.
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Effective Atomic Numbers of Low-Z Compounds for Photon Interaction

Nuclear Science and Engineering, 1997
Effective atomic numbers are derived for the low-Z compounds polyethylene, polycarbonate, Teflon, Mylar, polystyrene, and polyvinyl chloride for total photon interaction in the 10- to 20000-keV energy region. The number generally decreases and then increases with increasing energy.
S. Guru Prasad, K. Parthasaradhi, W. D. Bloomer   +2 more
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Photon attenuation coefficient and effective atomic number study of cements

Applied Radiation and Isotopes, 1993
Abstract The mass attenuation coefficients μ c ρ and the effective atomic numbers of four different cements have been calculated for total and partial photon interaction processes in the energy range 0.001–100,000 MeV. Small variations were noted in the mass attenuation coefficients due to chemical composition of cements for total and ...
G.S. Bhandal, K. Singh
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Effective density and atomic number determined from diffraction profiles

SPIE Proceedings, 2006
X-ray diffraction (XRD) profiles are conventionally used to determine lattice spacings via Bragg's law in order to characterize crystalline materials. It does not appear to be widely known that they also permit compositional information, such as effective atomic number and a density descriptor, to be determined from materials having little or no ...
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