EMISSION BAND SPECTRA OF NITROGEN: A STUDY OF SOME SINGLET SYSTEMS

1957 ◽  
Vol 35 (2) ◽  
pp. 216-234 ◽  
Author(s):  
Alf Lofthus
Keyword(s):  
Electronic Structure ◽  
High Resolution ◽  
Emission Band ◽  
Rotational Structure ◽  
Electron Configuration ◽  
Excitation Energies ◽  
Local Perturbations ◽  
Singlet States ◽  
Band Spectra ◽  
Vibrational Constants

Ten bands of Gaydon's and Herman's singlet systems and eight new bands have been photographed under high resolution and analyzed in detail. Two of the new transitions were shown to be [Formula: see text], the upper state being in one case identical with Watson's and Koontz's state g, and one new transition to be 1Δg—ω1Δu in type. It is proposed that the new state 1Δg has the same electron configuration as the [Formula: see text] state. Two bands in the red and one band in the ultraviolet could not be assigned with certainty. Local perturbations in the [Formula: see text] state were observed and shown to be caused by the ν = 1 level of the [Formula: see text] state. Observed pecularities in the rotational structure of most of the upper states are proposed to be indicative of a transition from case b′ to d′ coupling. In some cases pronounced decreases in branch intensities were observed, indicating predissociations probably caused by "forbidden" intercombination processes. Identification of the electronic structure of the higher singlet states in terms of Rydberg orbitals is discussed. Rotational and vibrational constants and excitation energies are presented.

Soft X-ray emission band spectra and electronic structure of non-dilute Al-Mg alloys

1972 ◽  
Vol 38 (5) ◽  
pp. 329-330 ◽  
Author(s):  
H. Neddermeyer
Keyword(s):  
Electronic Structure ◽  
Emission Band ◽  
Mg Alloys ◽  
X Ray ◽  
Band Spectra ◽  
Al Mg Alloys

HIGH RESOLUTION RAMAN SPECTROSCOPY OF GASES: XI. SPECTRA OF CS2 AND CO2

1958 ◽  
Vol 36 (2) ◽  
pp. 218-230 ◽  
Author(s):  
B. P. Stoicheff
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Raman Spectra ◽  
Rotational Structure ◽  
Rotational Spectrum ◽  
Vibrational Constants ◽  
Infrared Data

The vibrational Raman spectra of CS2, C12O2, and C13O2, consisting of the strong Fermi diad ν1, 2ν2 have been photographed with a 21 ft. grating. In the spectrum of CS2, 12 additional sharp Q branches were observed in the region of the diad; three are due to isotopic molecules and the remainder are "hot" bands. The rotational structure of the strong ν1 band was also obtained. These measurements together with infrared data are used to determine the vibrational constants ωi0 and xik of CS2. The pure rotational spectrum of CS2, with rotational lines up to J = 94, yields the constants B000 = 0.10910 ± 0.00005 cm−1, D000 = 1.0 × 10−8 cm−1, and r0(C=S) = 1.5545 ± 0.0003 Å. For C12O2, the rotational structure of the diad was analyzed and the results are in agreement with recent infrared data.

EMISSION BAND SPECTRA OF NITROGEN THE LYMAN-BIRGE-HOPFIELD SYSTEM

1956 ◽  
Vol 34 (8) ◽  
pp. 780-789 ◽  
Author(s):  
Alf Lofthus
Keyword(s):  
Raman Spectrum ◽  
High Resolution ◽  
Emission Spectrum ◽  
Ground State ◽  
Emission Band ◽  
Equilibrium Constants ◽  
Rotational Constants ◽  
Near Ultraviolet ◽  
Band Spectra

The near ultraviolet part of the emission spectrum of nitrogen has been photographed under high resolution. Thirteen bands of the [Formula: see text] system (Lyman–Birge–Hopfield) have been analyzed and new vibrational and rotational constants obtained. Combining the observed data with those obtained by Stoicheff from the Raman spectrum of nitrogen, refined equilibrium constants for the ground state were obtained. The predissociation in the α1Πg state was observed.

High resolution spectrum of GdO

1976 ◽  
Vol 54 (24) ◽  
pp. 2429-2434 ◽  
Author(s):  
B. R. Yadav ◽  
S. B. Rai ◽  
D. K. Rai
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Visible Emission ◽  
High Resolution Spectrum ◽  
First Order ◽  
Isotopic Shifts ◽  
Vibrational Constants ◽  
Dc Arc

The visible emission spectrum of the GdO molecule has been produced in a DC arc source and has been photographed in the first order of a 10.6 m grating spectrograph. Bands are shown to have a six-headed structure and improved vibrational constants have been obtained in this study. Isotopic shifts have been calculated for the various isotopic molecules. Tentative suggestions regarding the nature of the transition have been made.

scholarly journals The spectrum of thallium chloride

1938 ◽  
Vol 166 (925) ◽  
pp. 238-249 ◽  
Keyword(s):  
The Other ◽  
Electronic Transitions ◽  
Sufficient Information ◽  
Thallium Chloride ◽  
Band Spectra ◽  
Vibrational Constants

The results of a study of the spectrum of thallium fluoride (TIF) which have already been published (Howell 1937) contained so many points of unusual interest that it was considered desirable to extend the investigation to the other halides of thallium. In particular it was hoped to acquire sufficient information concerning the electronic transitions in TICI to enable a comparison to be made of the electronic levels of this molecule with those of TIF. Furthermore, certain of the vibrational constants of TICI, as listed in such reference works as Jevons' "Report on Band Spectra" (1932) and Sponer’s "Molekülspektren" (1936) seemed so abnormal as to justify a re-examination of this spectrum.

scholarly journals Realization of N-Type Semiconducting of Phosphorene through Surface Metal Doping and Work Function Study

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Haocheng Sun ◽  
Yuan Shang ◽  
Yanmei Yang ◽  
Meng Guo
Keyword(s):  
Electronic Structure ◽  
Work Function ◽  
Valence Electron ◽  
Electron Configuration ◽  
Impurity States ◽  
Cu Doping ◽  
Na Doping ◽  
Surface Metal ◽  
Structure Engineering ◽  
Surface Metal Atom

Phosphorene becomes an important member of the layered nanomaterials since its discovery for the fabrication of nanodevices. In the experiments, pristine phosphorene shows p-type semiconducting with no exception. To reach its full capability, n-type semiconducting is a necessity. Here, we report the electronic structure engineering of phosphorene by surface metal atom doping. Five metal elements, Cu, Ag, Au, Li, and Na, have been considered which could form stable adsorption on phosphorene. These elements show patterns in their electron configuration with one valence electron in their outermost s-orbital. Among three group 11 elements, Cu can induce n-type degenerate semiconducting, while Ag and Au can only introduce localized impurity states. The distinct ability of Cu, compared to Ag and Au, is mainly attributed to the electronegativity. Cu has smaller electronegativity and thus denotes its electron to phosphorene, upshifting the Fermi level towards conduction band, resulting in n-type semiconducting. Ag and Au have larger electronegativity and hardly transfer electrons to phosphorene. Parallel studies of Li and Na doping support these findings. In addition, Cu doping effectively regulates the work function of phosphorene, which gradually decreases upon increasing Cu concentration. It is also interesting that Au can hardly change the work function of phosphorene.

Re-analysis of the (100), (001), and (020) rotational structure of SO2 on the basis of high resolution FTIR spectra

2013 ◽  
Vol 130 ◽  
pp. 220-232 ◽  
Author(s):  
O.N. Ulenikov ◽  
G.A. Onopenko ◽  
O.V. Gromova ◽  
E.S. Bekhtereva ◽  
V.-M. Horneman
Keyword(s):  
High Resolution ◽  
Ftir Spectra ◽  
Rotational Structure

High resolution photoemission and Auger parameter studies of electronic structure of tin oxides

1995 ◽  
Vol 13 (3) ◽  
pp. 1382-1388 ◽  
Author(s):  
L. Kövér ◽  
G. Moretti ◽  
Zs. Kovács ◽  
R. Sanjinés ◽  
I. Cserny ◽  
...  
Keyword(s):  
Electronic Structure ◽  
High Resolution ◽  
Auger Parameter ◽  
Tin Oxides

THE LYMAN BANDS OF MOLECULAR HYDROGEN

1959 ◽  
Vol 37 (5) ◽  
pp. 636-659 ◽  
Author(s):  
G. Herzberg ◽  
L. L. Howe
Keyword(s):  
High Resolution ◽  
Vibrational Level ◽  
Ground State ◽  
Molecular Hydrogen ◽  
Equilibrium Constants ◽  
Dissociation Limit ◽  
Vibrational Levels ◽  
State Formula ◽  
Single Formula ◽  
Vibrational Constants

The Lyman bands of H2 have been investigated under high resolution with a view to improving the rotational and vibrational constants of H2 in its ground state. Precise Bv and ΔG values have been obtained for all vibrational levels of the ground state. One or two of the highest rotational levels of the last vibrational level (v = 14) lie above the dissociation limit. Both the [Formula: see text] and ΔG″ curves have a point of inflection at about v″ = 3. This makes it difficult to represent the whole course of each of these curves by a single formula and therefore makes the resulting equilibrium constants somewhat uncertain. This uncertainty is not very great for the rotational constants for which we find[Formula: see text]but is considerable for the vibrational constants ωe and ωexe for which three-, four-, five-, and six-term formulae give results diverging by ± 1 cm−1. The rotational and vibrational constants for the upper state [Formula: see text] of the Lyman bands are also determined. An appreciable correction to the position of the upper state is found.

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