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Broadening of the sodium 568.8, 589, 615.4 and 819.4 nm lines by atomic hydrogen
| Content Provider | Scilit |
|---|---|
| Author | Leininger, T. Gadéa, F. X. Dickinson, A. S. |
| Copyright Year | 2000 |
| Description | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Linewidths and shifts have been calculated in the impact approximation for atomic hydrogen broadening of the Na resonance and 3d-3p, 4d-3p and 5s-3p lines. The S-matrix elements required have been calculated in a time-dependent close-coupling approximation with straight-line paths for each Na term, including fine structure. The NaH potentials were determined using ab initio methods. Allowance was made for possible distant non-adiabatic transitions associated with ionic-covalent avoided crossings in$ ^{1}Σ^{+}$ symmetry. Our result for the width of the resonance line at 5000 K is somewhat below the observed value, although the calculated shift coefficient is consistent with experiment. The shift coefficient for the 615.4 nm (5s-3p) lines is found to be comparable with the broadening coefficient, primarily due to unusual behaviour in the long-range 5s $Σ^{+}$ potentials. The 819.4 nm (3d-3p) lines are found to have a larger broadening coefficient than the 568.8 nm (4d-3p) lines. For all the multiplets considered the different components of each line have widths differing by no more than a few per cent. Simple empirical fits are provided to the width coefficients of each multiplet. |
| Related Links | http://iopscience.iop.org/article/10.1088/0953-4075/33/9/310/pdf |
| Ending Page | 1817 |
| Page Count | 13 |
| Starting Page | 1805 |
| ISSN | 09534075 |
| e-ISSN | 13616455 |
| DOI | 10.1088/0953-4075/33/9/310 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Issue Number | 9 |
| Volume Number | 33 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2000-04-27 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Atomic, Molecular and Chemical Physics Broadening Coefficient Shift Coefficient |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics |
