Digitale Medien
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
97 (1992), S. 908-926
ISSN:
1089-7690
Quelle:
AIP Digital Archive
Thema:
Physik
,
Chemie und Pharmazie
Notizen:
We investigate the singlet gerade Rydberg series with low total angular momentum J=0,1,2 of molecular hydrogen near the ionization threshold. They are excited by starting at selected rotational levels of the B 1Σ+u (v'=0) state. The spectra show Rydberg series converging at the different rovibrational levels of the X 2Σ+g electronic ground state of H+2 with the Rydberg electron in an s or d-electronic orbital. An identification of the final states is done with the help of a model multichannel quantum defect theory (MQDT) calculation, which is also used to calculate quantum defects from a small set of parameters. Nearly n-independent quantum defects are derived from the experiment for the different Rydberg series with the Rydberg electron in the s-orbital. In the d-Rydberg series perturbations through l-uncoupling are small. An electronic s–d interaction between Rydberg series is present, which is partly induced by the doubly excited gerade configuration (1σu)2. Decay processes of the Rydberg states through autoionization, predissociation, or electric field ionization are found in the excitation spectra.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.463195
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