+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

High-resolution spectroscopy and quantum-defect model for the gerade triplet np and nf Rydberg states of He2

, : High-resolution spectroscopy and quantum-defect model for the gerade triplet np and nf Rydberg states of He2. Journal of Chemical Physics 140(6): 064304-064304

Photoionization spectra and Rydberg-state-resolved threshold-ionization spectra of the gerade triplet np Rydberg states of (4)He2 located in the vicinity of the X(+) (2)Σ(u)(+) (ν(+) = 0) ionization threshold were recorded from the 2sσ a (3)Σ(u)(+) metastable state. An accuracy of 0.01 cm(-1) was achieved for the experimental term values of the observed Rydberg states. The data were combined with spectroscopic data on low-lying triplet np and nf Rydberg states from the literature to derive energy- and internuclear-distance-dependent eigenquantum-defect parameters of multichannel quantum-defect theory (MQDT). The MQDT calculations reproduce the experimental data within their experimental uncertainties and enabled the derivation of potential-energy curves for the lowest triplet p Rydberg states (n = 2-5) of He2. The eigenquantum-defect parameters describing the p -f interaction were found to be larger than 0.002 at the energies corresponding to the high-n Rydberg states, so that the p -f interaction plays an important role in the autoionization dynamics of np Rydberg states with v(+) = 0. By extrapolating the experimental term values of triplet np Rydberg states of (4)He2 in the range of principal quantum number n between 87 and 110, the positions of the (v(+) = 0, N(+) = 3) and (v(+) = 0, N(+) = 5) levels of the ground state of (4)He(+)(2) were determined to lie 70.937(3) cm(-1) and 198.369(6) cm(-1), respectively, above the (v(+) = 0, N(+) = 1) ground rotational level.


PMID: 24527912

DOI: 10.1063/1.4864002

Other references

Curran, P.; Williamson, H., 1987: GLAI estimation using measurements of red, near infrared, and middle infrared radiance. Photogrammetric engineering and remote sensing 53(2): 181-186

Haas, L.F.; Swedenborg, E., 1993: Emanuel Swedenborg (1688-1772). Journal of Neurology, Neurosurgery, and Psychiatry 56(4): 343-343

Nye, P.H., 1955: Some soil-forming processes in the humid tropics. IV. The action of the soil fauna. Soil-forming activities of soil fauna in a forest region of south-west Nigeria are described. Termites and ants are important and among them Macrotermes nigeriensis Sjost is the most active in bringing up earth from a depth. Its mounds are describ...

Eppe, G.; Focant, J-François.; Pirard, C.; Pauw, E.De., 2008: PTV-LV-GC/MS/MS as screening and complementary method to HRMS for the monitoring of dioxin levels in food and feed. Recent developments in trapping efficiency inside ion trap mass spectrometer permitted to lower instrument detection limit (IDL). An IDL of 200 fg micro l-1 injected with a signal-to-noise ratio of 5:1 for tetrachlorodibenzo-p-dioxin (TCDD) was ob...

Benumof, J.L.; Feroe, D., 1998: Swallowing topically administered 4% lidocaine results in nausea and vomiting. In preparing adult volunteers for insertion of an upper airway device, we observed a high incidence of nausea and vomiting in the first 16 consecutive volunteers who were allowed to swallow topically administered 4% lidocaine (50% and 31%, respect...

Ernould, L., 1951: The comparative variability of diploid, male sterile, and tetraploid sugar beets. Analyses were made of root weight and sugar content in (a) diploid sugar beets as represented by a commercial variety and the male sterile types, US 6101 and US 6114, and (b) two tetraploid lines comprising respectively 95% and 98% of tetraploids....

Butt W.R., 1984: Problems of iodination. Butt, W R (Ed ) Clinical And Biochemical Analysis, Vol 14 Practical Immunoassay: The State Of The Art Xi+318p Marcel Dekker, Inc : New York, N Y , Usa Illus 19-36

Donato, A.Sipkes., 2011: Nurse practitioners in Holland: Definition, preparation, and prescriptive authority. Journal of the American Academy of Nurse Practitioners 21(11): 585-587

Mashenkov, Vf, 1980: Main regularities of the increase of labor productivity in agriculture. Sbornik nauchnykh trudov Vsesoiuznyi nauchno issledovatel'skii institut ekonomiki sel'skogo khoziaistva: 2) 116-125

Anon, 1968: Imiphos the academy of sciences of the latvian ssr institute of organic synthesis. Imiphos The Academy Of Sciences Of The Latvian-Ssr Institute Of Organic Synthesis 218