Elektronisko pāreju uz zemāko tripleta stāvokli a3Sigma(+) reģistrācija un analīze RbCs un KCs molekulās
Date
2021
Authors
Krūmiņš, Valts
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Maģistra darbā tika pētītas pārejas no sajauktiem ierosinātiem elektroniskiem stāvokļiem uz a3Σ+ stāvokli RbCs un KCs molekulās. Pielietojot lāzeru inducētās fluorescences (LIF) augstas izšķirtspējas Furjē transformāciju spektroskopiju, RbCs molekulā ir novērotas un analizētas pārejas no A1Σ+~b3Π kompleksa uz a3Σ+, kas ļauj pārliecināties par aprēķināto A~b kompleksa viļņu funkciju precizitāti, kā arī pārbaudīt pārejas dipola momenta funkciju aprēķinu korektumu. KCs molekulā tika novērotas LIF pārejas no c3Σ+ stāvokļa uz a3Σ+ stāvokli. Tas ļāva noteikt c3Σ+ stāvokļa līmeņu enerģijas, kas nepieciešams šī stāvokļa potenciāla iegūšanai. Pāreja c3Σ+ → a3Σ+ tika izmantota arī spektru reģistrācijai uz a3Σ+ stāvokļa atgrūšanās daļu virs disociācijas robežas, kas dod informāciju par šī stāvokļa potenciālu šajā diapazonā.
Transitions from excited mixed electronic states to the state a3Σ+ in RbCs and KCs were investigated in this thesis. Laser-induced fluorescence (LIF) high resolution Fourier transformation spectroscopy was used in RbCs molecule to register and analyze transitions from A1Σ+~b3Π complex to a3Σ+. That allows to check accuracy of the calculated A~b complex wave functions as well as to check correctness of transition dipole moment calculations. LIF transitions from state c3Σ+ to state a3Σ+ were recorded in KCs molecule. That allowed finding out the energies of levels of the c3Σ+ state, that are necessary for construction of a potential for this state. Transition c3Σ+ → a3Σ+ was also used for registration of spectra to the repulsive part above the dissociation limit of the a3Σ+ state. That provides information about the potential of this state in this range.
Transitions from excited mixed electronic states to the state a3Σ+ in RbCs and KCs were investigated in this thesis. Laser-induced fluorescence (LIF) high resolution Fourier transformation spectroscopy was used in RbCs molecule to register and analyze transitions from A1Σ+~b3Π complex to a3Σ+. That allows to check accuracy of the calculated A~b complex wave functions as well as to check correctness of transition dipole moment calculations. LIF transitions from state c3Σ+ to state a3Σ+ were recorded in KCs molecule. That allowed finding out the energies of levels of the c3Σ+ state, that are necessary for construction of a potential for this state. Transition c3Σ+ → a3Σ+ was also used for registration of spectra to the repulsive part above the dissociation limit of the a3Σ+ state. That provides information about the potential of this state in this range.
Description
Keywords
Fizika , RbCs molekula , KCs molekula , A~b komplekss , a3S+ stāvoklis , c3S+ stāvoklis