Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series

Details Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confere03s&link_type=abstract

"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec

Physics

Radicals And Ions

Scientific paper

Metastable ^4He_2 molecules [a ^3Σ u^+ (v=0,N=1,3,5,7)] were produced in a supersonic expansion of neat helium atoms by striking a discharge at the orifice of a pulsed valve. Transitions to np Rydberg states (n up to 150) converging to the first rotational levels of the ground state of He_2^+ [ X^+ ^2Σ u^+ (v^+=0,N^+=1,3,5)] were recorded at a precision better than 10-3 cm-1 using the technique of Rydberg-state-resolved threshold ionization spectroscopy. The observed Rydberg series reveal strong perturbations caused by rotational channel interactions and the appearance of the spectra is strongly influenced by weak electric fields present in the excitation region. The extrapolation of the Rydberg series to their limits using multichannel quantum defect theory enabled the determination of the rotational structure of the helium dimer cation and of quantum defect parameters for the corresponding ionization channels. These results represent a benchmark for ab initio calculations on three-electron systems.
M. Raunhardt, M. Schäfer, N. Vanhaecke, and F. Merkt, J. Chem. Phys. 128, 164310 (2008)
R. Seiler, U. Hollenstein, G. M. Greetham, and F. Merkt, Chem. Phys. Lett. 346, 201 (2001)
A. Carrington, Ch. H. Pyne, and P. J. Knowles, J. Chem. Phys. 102, 5979 (1995)
J. Xie, B. Poirier, and G. I. Gellene, J. Chem. Phys. 122, 184310 (2005)

Affiliated with

Also associated with

No associations

Rating

Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of Rotational Levels of the Homonuclear Helium Dimer Cation BY\ Extrapolation of Rydberg Series will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1591816