| 1. |
- Jansons, M, et al.
(författare)
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Quasi-resonant Energy-transfer In Collisions - Na2(a(1)sigma(u)(+))+k(4s)
- 1994
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 31:1-2, s. 55-59
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Tidskriftsartikel (refereegranskat)abstract
- Cross sections for electron energy transfer from the initial rotational state J' of the two lowest vibrational levels upsilon' = 0 and upsilon' = 1 of excited dimers Na2(A) to potassium atoms as described by Na2(A1Sigma(u)+, upsilon'J') + K(4S) --> Na2 (X1Sigma(g)+, upsilon''J'')+K(4P)+DeltaE have been examined by laser-induced fluorescence. A strong increase of the cross section by as much as an order of magnitude has been observed for those dimer upsilon'J'-levels for which the dipole transitions are close to resonance of the 4S-4P transitions in the atom (DeltaE < 4 cm-1). The absolute cross sections for energy transfer have been calculated by the Rabitz approximation of first-order perturbation theory. In the case of closest energy resonance (DeltaE = 0.9 cm-1) the cross section is Q = 7.8 x 10(-13) cm2.
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| 2. |
- Zerne, R, et al.
(författare)
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Determination of Radiative Lifetimes In the 3d(10)4snpp-1(1) Sequence of Neutral Zinc By Time-resolved Vuv Laser Spectroscopy
- 1994
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 32:3, s. 187-189
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Tidskriftsartikel (refereegranskat)abstract
- Time resolved laser spectroscopy in the VUV spectral region is applied to investigate the (n=5-8) 3d(10) 4snp P-1(1) series of neutral zinc. The natural lifetimes of this series were measured by time-resolved laser-induced fluorescence. We find tau(n=5)=11.7(9) ns, tau(n=6)=80(8) ns, tau(n=7)=179(20) ns and tau(n=8)=356 (35) ns. These results are compared with a theoretical calculation.
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| 3. |
- Zerne, R, et al.
(författare)
-
Radiative Lifetimes In Neutral Tellurium Measured By Time-resolved Laser Spectroscopy
- 1994
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 32:1-2, s. 31-34
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Tidskriftsartikel (refereegranskat)abstract
- Measurements of natural radiative lifetimes in atomic tellurium in the 5 p(3)7p configuration are reported. Two-step laser excitation was applied on tellurium vapour in a cell that was differentially heated and pumped through a capillary. The decay of the fluorescence signal was recorded at different vapour pressures. The following four radiative lifetime values were obtained: 7p P-5(1): 128(11) ns, 7p P-5(2): 99(8) ns, 7p P-3(1): 82(10) ns and 7p P-3(2): 124(8) ns.
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