Results 211 to 220 of about 73,179 (247)

Calculation of Auger Lifetimes in HgCdTe

Journal of Electronic Materials, 2011
Band-to-band Auger recombination mechanisms in HgCdTe are investigated as functions of temperature in the small modulation limit by using realistic electronic structures obtained by empirical pseudopotential calculations and their corresponding wavevector-dependent dielectric functions. The calculated Auger lifetimes are compared with the semiempirical
BERTAZZI, FRANCESCO, GOANO, MICHELE, Bellotti E.   +2 more
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Lifetime calculations in Yb II

Journal of Physics B: Atomic, Molecular and Optical Physics, 1998
Oscillator strengths and lifetime values for Yb II levels have been calculated within the framework of a pseudo-relativistic Hartree-Fock (HFR) approximation combined with a least-squares fitting of the calculated eigenvalues to the observed energy levels.
E Biémont, J-F Dutrieux, I Martin, P Quinet   +3 more
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Positronium lifetime calculation

Physical Review D, 1993
A new approach to a positronium lifetime calculation is proposed. The method is completely relativistic and gauge invariant. The full positronium width is determined through several parameters connected with a dynamics of forming the bound state. These parameters play the same role as structure functions in the case of inclusive deep-inelastic lepton ...
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Calculation of the lifetimes for intermediate Rydberg states

Physical Review B, 1989
Using a model we have previously developed, we have investigated the lifetime of the first five members of the Rydberg series that can exist in the vicinity of a metallic surface. We found that we enter quickly into the asymptotic regime, the whole process scaling finally as 1/n/sup 3/ and allowing one in principle to resolve the entire series.
, de Andres PL, , Echenique, , Flores
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Lifetime Calculations Relative to Maximum Bubble Pressure Measurements

Journal of Colloid and Interface Science, 1998
The theoretical description of maximum bubble pressure experiments needs to consider inertial properties of the gas and liquid. On the basis of an analysis of the time-dependent pressure gradient inside the capillary, bubble lifetime and bubble deadtime are estimated.
Koval'chuk, V., Dukhin, S., Fainerman, V., Miller, R.   +3 more
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Constancy of Calculation Procedure for Radiation Lifetimes

Proceedings of Petersburg Transport University, 2022
Purpose: Radiation lifetimes of atom and ion energy levels refer to fundamental physical constants which knowledge of is necessary in many fields of both, fundamental or applied science. The knowledge of these values is necessary at search of active medias for optical generators, for plasma both laboratory or astrophysical and other diagnostics.
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Lifetime measurements and calculated transition probabilities in W III

Physica Scripta, 2008
New experimental lifetimes for two levels in doubly ionized tungsten, W III, have been obtained using the time-resolved laser-induced-fluorescence technique. Theoretical oscillator strengths obtained from a HFR calculation including the effects of core-polarization are reported for all transitions from levels below E 2, thus greatly extending our ...
Palmeri, P., Quinet, Pascal, Fivet, V., Biémont, Emile, Nilsson, H., Engström, L., Lundberg, H.   +6 more
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First-principles calculation of positron lifetimes in solids

Physical Review B, 1991
We present a first-principles approach for calculating the positron lifetime in metals. Convenient expressions are provided for the electron-positron correlation function and the enhancement factor. Calculations on a wide range of elemental metals and some monovacancies are found to be in excellent agreement with experiment. The approximations inherent
, Sterne, , Kaiser
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Calculating Spin Lifetime

2017
We have extended a lattice independent code to integrate the Thomas-BMT equation over 2 hours of beam time in the presence of two orthogonal Siberian snakes. In tandem to this we have recast the Thomas-BMT equation in the presences of longitudinal dynamics, into the parametric resonance formalism recently developed to understand overlapping spin ...
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LIFETIME COSTS OF BIRTH DEFECTS CALCULATED

Pediatrics, 1995
Coinvestigators at the University of Utah and the University of California, Davis and Berkeley, estimated the indirect mortality and morbidity costs, as well as the direct costs of medical care, developmental services, and special education over the entire lifespan of those born with each birth defect in California in 1988.
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