| 1. |
- Johansson, S. G, et al.
(författare)
-
Comparison of New Experimental and Astrophysical F-values For Some Ru-ii Lines, Observed In Hst Spectra of Chi-lupi
- 1994
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 421:2, s. 809-815
-
Tidskriftsartikel (refereegranskat)abstract
- We report on experimental absolute oscillator strengths for 18 UV lines of Ru II, obtained by combining laser-induced fluorescence measurements of radiative lifetimes and branching fractions from line intensities in a calibrated Fourier-transform spectrum. HST/GHRS observations of the spectrum of the sharp-lined B star chi Lupi contain six of these lines, for which ''astrophysical'' relative f-values have been determined. The agreement is within 0.10 dex for a Ru abundance of log N(Ru)/N(H) = -7.90, which is 2.3 dex above the solar abundance.
|
|
| 2. |
- Åkeby, Hans, et al.
(författare)
-
ELECTRONIC AND GEOMETRIC STRUCTURE OF THE CUN CLUSTER ANIONS (N-LESS-THAN-OR-EQUAL-TO-10)
- 1990
-
Ingår i: Journal of Physical Chemistry. - 0022-3654. ; 94:14, s. 5471-5477
-
Tidskriftsartikel (refereegranskat)abstract
- The structures of the anionic Cu, clusters with n I 10 have been investigated by using correlated wave functions includingthe effects of core (3d)-valence correlation through a model operator. The Cu core orbitals (including 3d) are describedby an effective core potential (ECP). The accuracy of both the ECP description and the treatment of corevalence correlationeffects is established by comparing with all-electron calculations for the smaller clusters. Recent experimental data for theelectron detachment energy (EDE) and HOMO-LUMO separations is combined with the computed total energies to establishthe structure of the observed Cui clusters. The EDE's are found to be strongly structure dependent, which is used to determinewhich of the low-lying structures is observed experimentally.
|
|
| 3. |
|
|
| 4. |
- Jansson, Magnus, et al.
(författare)
-
Efficient Implementation of a Submodel for Composite Materials to be Combined with the FDTD-Algorithm
- 1994
-
Ingår i: IEEE Transactions on Magnetics. - : IEEE Magnetics Society. - 0018-9464 .- 1941-0069. ; 30:5, s. 3188-3191
-
Tidskriftsartikel (refereegranskat)abstract
- A submodel to be used for thin sheets of semiconducting materials in combination with the finite difference time domain algorithm for solving Maxwell's equations is derived. Emphasis is concentrated on accomplishing an efficient and robust algorithm. Stability properties of the combined model are also investigated
|
|
