scholarly journals ROTATIONAL ANALYSIS OF A NEW [15.05] Ω=0+ – X 3Σ(0+) ELECTRONIC TRANSITION OF TUNGSTEN SULFIDE (WS) IN THE 14,900 - 16,100 cm−1 REGION OBSERVED USING ILS-FTS

2021 ◽  
Author(s):  
Kristin Bales ◽  
Leah O'Brien ◽  
James O'Brien ◽  
Jack Harms
Keyword(s):  
Electronic Transition ◽  
Rotational Analysis ◽  
Tungsten Sulfide

The Resonance Fluorescence and Absorption Spectrum of Nitrogen Dioxide

1973 ◽  
Vol 51 (20) ◽  
pp. 2184-2188 ◽  
Author(s):  
J. C. D. Brand ◽  
J. L. Hardwick ◽  
R. J. Pirkle ◽  
C. J. Seliskar
Keyword(s):  
Absorption Spectrum ◽  
Nitrogen Dioxide ◽  
Electronic Transition ◽  
Parallel Structure ◽  
Rotational Analysis ◽  
Resonance Fluorescence ◽  
Strong Resonance ◽  
Ion Laser

A krypton ion laser operating at 6470 Å excites strong resonance fluorescence in nitrogen dioxide gas. The fluorescence bands have "parallel" structure (ΔK = 0) and are assigned to the electronically allowed subsystem of a 2B2–2A1 electronic transition. A partial rotational analysis is given for the upper state of the fluorescence bands, and their relationship to the absorption spectrum in the region 6000–11 500 Å is discussed.

Absorption spectrum of SiH in the vacuum ultraviolet

1969 ◽  
Vol 47 (18) ◽  
pp. 1889-1897 ◽  
Author(s):  
G. Herzberg ◽  
A. Lagerqvist ◽  
B. J. McKenzie
Keyword(s):  
Absorption Spectrum ◽  
Electronic Transition ◽  
Vacuum Ultraviolet ◽  
Rotational Analysis ◽  
Molecular Constants

A new electronic transition of SiH has been observed in absorption near 1907 Å in flash discharges through mixtures of SiH4 and H2. The rotational analysis shows this transition to be of the type 2Σ+−2Π. The corresponding transition of SiD has also been observed and analyzed. The D2Δ−X2Π transition near 2058 Å which was observed and analyzed by Verma in SiD has been measured here for SiH, where the lines are much broader on account of predissociation. The predissociation phenomena in SiH and SiD and the electron configurations are briefly discussed, and the presently known molecular constants of these molecules are summarized.

scholarly journals The spectrum of rubidium hydride, RbH I. Analysis

1939 ◽  
Vol 173 (952) ◽  
pp. 28-37 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Electronic Transition ◽  
Rotational Constant ◽  
Rotational Structure ◽  
Rotational Analysis ◽  
The Many ◽  
Sodium And Potassium ◽  
Line Type ◽  
Overlapping Bands

The spectra of the diatomic hydrides of lithium, sodium and potassium have been studied both in absorption and in emission by several authors, LiH by Nakamura (1930, 1931) and Crawford and Jorgensen (1935), NaH by Hori (1930, 1931) and Olsson (1935), KH by Almy and Hause (1932) and Hori (1933), and recently Almy and Rassweiler (1938) have published details of the absorption spectrum of caesium hydride. All these hydrides show spectra of the “ many-line” type consisting of numerous overlapping bands with open rotational structure and no obvious heads. A rotational analysis shows that they all have the same type of electronic transition, 1Σ → 1Σ ,and are very strongly degraded towards the red. These spectra are all anomalous in that the frequency, ω´ v , and the rotational constant, B'v,increase at first with increasing initial vibrational quantum numbe v `.

Rotational analysis of à 2A1↔X̃ 2E electronic transition of the jet‐cooled methylthio radical

1989 ◽  
Vol 90 (12) ◽  
pp. 6852-6857 ◽  
Author(s):  
Yen‐Chu Hsu ◽  
Xianming Liu ◽  
Terry A. Miller
Keyword(s):  
Electronic Transition ◽  
Rotational Analysis

Rotational Analysis of the C2Π → X2Σ+ Electronic Transition of LaO

1971 ◽  
Vol 49 (20) ◽  
pp. 2552-2564 ◽  
Author(s):  
David W. Green
Keyword(s):  
Unpaired Electron ◽  
Nuclear Spin ◽  
Electronic Transition ◽  
Rotational Level ◽  
Spectroscopic Constants ◽  
Rotational Analysis ◽  
Pure Case ◽  
X State ◽  
Π State

A rotational analysis of the 0–0 band of the LaO C2Πr → X2Σ+ transition near 4400 Å has revised the previously reported analysis. It is demonstrated that the C2Π state is also the upper state of previously analyzed bands near 6500 Å. It is shown that the X state of LaO is 2Σ+ and that an interaction between the unpaired electron and the La nuclear spin causes a doubling (0.51 cm−1) of each rotational level. This splitting appears to show a slight rotational dependence and a negligible vibrational dependence. The coupling of the X2Σ+ state is nearly pure case bβS. The C2Πr state exhibits a large Λ doubling. The 0–0 subband origins are at 22 839.61 for the C2Π3/2 → X2Σ+ and 22 618.87 cm−1 for the C2Π1/2 → X2Σ+. Rotational spectroscopic constants are reported.

Rotational Analysis of Bands of the Transition of PH2

1972 ◽  
Vol 50 (19) ◽  
pp. 2265-2276 ◽  
Author(s):  
J. M. Berthou ◽  
B. Pascat ◽  
H. Guenebaut ◽  
D. A. Ramsay
Keyword(s):  
Excited State ◽  
Ground State ◽  
Electronic Transition ◽  
Rotational Analysis ◽  
Empirical Formulas ◽  
Molecular Constants ◽  
Vibrational Levels

Rotational analyses have been carried out for the 0ν′20–000 bands of the [Formula: see text] electronic transition of PH2 with ν′2 = 1–8. Approximately 1000 lines have been assigned. The earlier analysis of the 000–000 band has been extended and improved molecular constants obtained. The Hamiltonian used for this band does not fit the excited state levels with [Formula: see text]. Term values are therefore given for all observed levels. Empirical formulas are presented which give approximate fits to the higher levels. Numerous rotational perturbations are found in the excited state. Perturbations up to 0.6 cm−1 are also found in the 000 level of the excited state. These latter perturbations can only be caused by the higher vibrational levels of the ground state.

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