Results 221 to 230 of about 75,849 (264)

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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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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Calculation of the Prompt Neutron Lifetime in the NBSR

Nuclear Science and Engineering, 2006
The prompt neutron lifetime was calculated for the NBSR, a heavy water-cooled and -moderated research reactor at the National Institute of Standards and Technology. The method is based on the fact that the decay of a pulse of fast neutrons is related to the prompt neutron lifetime (and the multiplication constant for the reactor and the delayed neutron
Albert L. Hanson, Hans Ludewig, David J. Diamond   +2 more
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Comment on the Calculation of Neutron Lifetime

Nuclear Science and Engineering, 1969
(1969). Comment on the Calculation of Neutron Lifetime. Nuclear Science and Engineering: Vol. 38, No. 2, pp. 178-179.
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Calculation of the lifetime of electrical busbar joints

European Transactions on Electrical Power, 1997
AbstractElectrical joints can be a weak points and with it endanger the reliability of electrical power‐transmission systems. On the example of Aluminium‐to‐Aluminium and Aluminium‐to‐Copper busbar joints is shown how one can get information about the principle ageing behaviour from long‐term test.
R. Bergmann, H. Löbl, H. Bohme, S. Großmann   +3 more
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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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Calculations of 2plifetimes in the Li sequence

Physical Review A, 1991
Lifetime predictions for the 2{ital p} {sup 2}{ital P}{sub 1/2} and 2{ital p} {sup 2}{ital P}{sub 3/2} levels in the lithium isoelectronic sequence have been computed for atomic numbers {ital Z}=3--92 using the semiempirical Coulomb approximation with a Hartree-Slater core.
, Theodosiou, , Curtis, , El-Mekki
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Calculation of the carrier lifetime in Hg1−xZnxTe

Infrared Physics, 1988
Abstract The carrier lifetimes in Hg 1− x Zn x Te for radiative and band-to-band Auger recombination are calculated for the temperature range 77–300 K and the composition range 0.10 ⩽ x ⩽ 0.24. The Auger rates are calculated according to Petersen-Casselman theory and Gelmont theory. Comparative study of these theories is made.
T. Niedziela, A. Rogalski, J. Piotrowski
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Multidimensional WKB approximation and the lifetime calculation

Physical Review A, 2001
A Wentzel-Kramers-Brillouin (WKB) approach for calculating the lifetime of the ground state of two coupled oscillators with the most probable escape path along one of the coordinate axes is suggested. The WKB approximation of the wave function in the neighborhood of this path is obtained by scaling the corresponding variable.
J. Zamastil, V. Špirko, J. Čížek, L. Skála, O. Bludský   +4 more
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The Calculation of Positron Lifetimes

1984
A recent admirable review by Drachman, 1 given on the occasion of the first conference in this series, contains a helpful section on lifetime calculations. Drachman reviews two interesting techniques for improving the accuracy of calculated lifetimes which are based not upon calculating better wave functions but rather upon operator transformations. In
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