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- Carlsson, J, et al.
(författare)
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Lifetimes and Transition-probabilities of the Boron Atom Calculated With the Active-space Multiconfiguration Hartree-fock Method
- 1994
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Ingår i: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 49:5, s. 3426-3431
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Tidskriftsartikel (refereegranskat)abstract
- Systematic multiconfiguration Hartree-Fock results are presented for the transition probabilities and excited-state lifetimes in the term system of the boron atom. Particularly, the interaction between the 1s(2)2s2p2 configuration and the 1s(2)2s2ns2S and 1s(2)2s2nd2D Rydberg series is considered. Term energies and transition-matrix elements are calculated to convergence using increasing active sets of s, p, d, f, and g orbitals.
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| 4. |
- Carlsson, J, et al.
(författare)
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Multiconfiguration Hartree-fock Calculations and Time-resolved Laser Spectroscopy Studies of Hyperfine-structure Constants In Sodium
- 1992
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Ingår i: Physica Scripta. Topical Issues. - : IOP Publishing. - 0281-1847. ; 46:5, s. 394-398
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Tidskriftsartikel (refereegranskat)abstract
- Hyperfine structure constants for the ground and first excited states of sodium are calculated using a newly written hyperfine structure program, which is part of the MCHF Atomic Structure Package. The calculated hyperfine structure constants are compared with the most reliable values obtained in other theoretical studies and in experiments. Also, a new accurate experimental determination of the 3p P-2(1/2) state hyperfine structure is presented.
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| 5. |
- Fischer, Charlotte, et al.
(författare)
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Mchf Calculations For Atomic Properties
- 1994
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Ingår i: Computer Physics Communications. - 0010-4655. ; 84:1-3, s. 37-58
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Tidskriftsartikel (refereegranskat)abstract
- A historical review of the early development of Hartree-Fock and Multiconfiguration Hartree-Fock theories is presented. After the underlying theory is summarized, some recent results from the application of these methods to the prediction of atomic properties are described. These include total energies, transition probabilities, autoionization rates, specific mass shifts, and hyperfine parameters. In each case, large-scale, systematic procedures are used to show the convergence of the theoretically predicted results.
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| 8. |
- Jiang, Z. K, et al.
(författare)
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Studies on radiative lifetimes in the 4d10ns2S and 4d10nd2D sequences of neutral silver
- 1990
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 17:1, s. 1-4
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Tidskriftsartikel (refereegranskat)abstract
- We have performed lifetime measurements in the sequences of2S1/2 and2D3/2 states for the alkali-like 4d10 ns,nd configurations of neutral silver. Selective stepwise excitations from the 4d10 5s2S1/2 ground state were performed using two pulsed dye lasers. Optical transients were recorded and evaluated with regard to the decay time. The lifetime results are compared with those of a theoretical study in which a model potential has been used to describe the polarisation of the 4d shell.
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- Johannesson, Magnus, et al.
(författare)
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Willingness to pay for lipid lowering: a health production function approach
- 1993
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Ingår i: Applied economics. - : Chapman & Hall Ltd. - 1466-4283 .- 0003-6846. ; 25:8, s. 1023-1031
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Tidskriftsartikel (refereegranskat)abstract
- This Paper reports the results of an experiment of measuring willingness to pay (WTP) for lipid lowering. WTP is derived from a theoretical model of health risk reductions, using a health production function approach. A survey of about 700 persons randomized into a lipid lowering trial in Sweden is used to estimate WTP. The willingness to give up time (WTGT) to take part in a lipid lowering programme is also measured in the survey, to assess its relationship to WTP. The response rates on the WTP and WTGT qusetions are 94% and 96%, respectively, and the patients are on average perpared to pay about Skr 350 per month or devote about 5 h of leisure time per week to get normal lipid levels. The Correlation of WTP and WTGT is 0.45 and highly significant. The results of regression of WTP and WTGT are in accordance with the theoretical predictions with a higher valuation for a greater perceived difference in health status with and without treatment. The income elasticity is also positive as expected.
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