Results 261 to 270 of about 4,533,614 (299)
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Shifts of Energy Levels with Pressure
1973As we have indicated in the introduction, a common effect of pressure is to shift the energy of one type of orbital with respect to another. Usually one measures the shift by optical absorption although other techniques, such as Mossbauer resonance, may give useful information.
H. G. Drickamer, C. W. Frank
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Surface core-level shift of lead sulfide
Physical Review B, 1990The results of a photoemission study of the surface core-level shift of the Pb 5d level in the semiconductor PbS are reported. We found no surface shift within an experimental error of \ifmmode\pm\else\textpm\fi{}0.1 eV. Since this compound is highly ionic, this result is inconsistent with the theory that ionicity determines surface core-level shifts ...
, Paolucci, , Prince
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Night Shift Work and Hormone Levels in Women
Cancer Epidemiology, Biomarkers & Prevention, 2012AbstractBackground: Night shift work may disrupt the normal nocturnal rise in melatonin, resulting in increased breast cancer risk, possibly through increased reproductive hormone levels. We investigated whether night shift work is associated with decreased levels of urinary 6-sulfatoxymelatonin, the primary metabolite of melatonin, and increased ...
Scott, Davis +3 more
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Perihelion shift and level ordering
Physics Letters A, 1984Abstract Properties of central potentials which determine a definite level ordering in quantum mechanics are shown to determine definite perihelion shifts of classical orbits. These properties are super- or subharmonicity of the potential off the origin, and convexity or concavity as a function of the radius squared.
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Psychophysiological Correlates of Shifting between Levels of Automation
Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 2007The main aim of this study was to investigate the effects on performance and workload of the shifting between levels of automation: from manual to automatic (forward shift) and from automatic to manual (backward shift). Three levels of difficulty of the Tetris game were implemented as task load conditions.
DI NOCERA, Francesco +2 more
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Solid State Communications, 1977
Abstract In a time-independent theory or in a Greens function formalism, the shift in energy of a k-wave electron state due to an impurity in a metal is not equal to the real part of the forward-scattering T-matrix, Re Tκκ, as often assumed.
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Abstract In a time-independent theory or in a Greens function formalism, the shift in energy of a k-wave electron state due to an impurity in a metal is not equal to the real part of the forward-scattering T-matrix, Re Tκκ, as often assumed.
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Identifying response shift statistically at the individual level
Quality of Life Research, 2008The purpose of this study was to explore whether a longitudinal comparison between reported and predicted health could be used as a method of identifying subjects who potentially experienced response shift.A response-shift model was developed using data from a longitudinal study of stroke in which measures of stroke impact were made at study entry and ...
Nancy E, Mayo +4 more
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Calculations of surface core-level shifts for the lanthanides
Physical Review B, 1990We report self-consistent surface electronic-structure calculations for metals across the lanthanide series. We have used the self-consistent-field linear muffin-tin orbital method with the atomic-sphere approximation in a supercell'' geometry. The calculations provide values of the surface core-level shifts (SCLS) on the (0001) face for all the hcp ...
, Begley +3 more
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Calphad, 1984
Abstract The binding energies of deep lying core electrons of closed inner atomic shells are sensitive to changes in chemical bonding. For metallic systems the shifts of core level binding energies as function of the alloy composition can be related to partial solution energies of the alloy and therefore these shifts can be used to determine the ...
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Abstract The binding energies of deep lying core electrons of closed inner atomic shells are sensitive to changes in chemical bonding. For metallic systems the shifts of core level binding energies as function of the alloy composition can be related to partial solution energies of the alloy and therefore these shifts can be used to determine the ...
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Core-level shifts, isomer shifts and the electron distribution of iron
Journal of Electron Spectroscopy and Related Phenomena, 1981Abstract The radial integrals of 1/r and 1/r3 have been calculated for a number of ion states of Fe. Correlations involving different inner-shell binding energies and atomic charges have been studied and a method for estimating effective valence-electron populations is discussed.
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