| Zugriffsnummer | 17296 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | High precision description of the rovibronic structure of the I2 B-X spectrum |
| Autor(in); Institution |
Knöckel, Horst; Universität Hannover, Institut für Quantenoptik, Hannover, GERMANY
Bodermann, Bernd; 4.2, Bild- und Wellenoptik, PTB-Braunschweig
Tiemann, Eberhardt; Universität Hannover, Institut für Quantenoptik, Hannover, GERMANY
|
| Quelle/Jahr | The European Physical Journal D: 28 (2004), 2, 199 - 209 |
| ISSN | 1434-6060 |
| Verlag | Orsay: EDP Sciences |
| Freie Schlagworte | Rotation ; vibration ; vibration-rotation constants ; visible spectra ; interatomic potentials and forces |
| Zusammenfassung | A precise description of the B-X spectrum of the I2 molecule has been developped. All presently available high precision measurements on the B-X spectrum of the I2 molecule in the visible were introduced into a model based on molecular potentials for the two electronic states involved, the transition frequencies being the differences of the energy eigenvalues for the rovibrational levels in those potentials. This approach allows, depending on the quality of the input data, a prediction of iodine lines with a 2 σ uncertainty of less than 30 MHz from 815nm to 515nm of most bands in that range. In the range between 666nm to 526nm, where highly precise systematic measurements exist, a smaller 2 σ uncertainty of 3 MHz is achieved. Moreover, a precise local model description of selected bands of the B-X spectrum has been derived from high precision measurements of iodine lines in the near infrared between 778nm and 815nm. This approach by using a Dunham parameter description allows to predict lines of these bands with a 1 σ uncertainty of less than 200 kHz. A computer program, which in addition to these models also includes the model for the description of the hyperfine structure, can be used as a convenient tool in spectroscopic calibration tasks. |
