Measurement of gas temperature from the unresolved rotational structure of the first positive band system of nitrogen

1983 ◽  
Vol 39 (3) ◽  
pp. 999-1003 ◽  
Author(s):  
Yu. B. Golubovskii ◽  
V. M. Telezhko
Keyword(s):  
Band System ◽  
Rotational Structure ◽  
Gas Temperature ◽  
Positive Band

THE ABSORPTION SPECTRUM OF CF2

1967 ◽  
Vol 45 (7) ◽  
pp. 2355-2374 ◽  
Author(s):  
C. Weldon Mathews
Keyword(s):  
Absorption Spectrum ◽  
Electronic State ◽  
Ground State ◽  
Band System ◽  
Electronic States ◽  
Vibrational Structure ◽  
Rotational Structure ◽  
Transition Moment ◽  
High Dispersion ◽  
Parallel Type

The absorption spectrum of CF2 in the 2 500 Å region has been photographed at high dispersion, and the rotational structure of a number of bands has been analyzed. The analysis of the well-resolved subbands establishes that these are perpendicular- rather than parallel-type bands, as previously assigned. Further analysis shows that the upper and lower electronic states are of 1B1 and 1A1symmetries respectively, corresponding to a transition moment that is perpendicular to the plane of the molecule. In the upper electronic state, r0(CF) = 1.32 Å and [Formula: see text], while in the ground state, r0(CF) = 1.300 Å and [Formula: see text]. An investigation of the vibrational structure of the band system has shown that the vibrational numbering in ν2′ must be increased by one unit from earlier assignments, thus placing the 000–000 band near 2 687 Å (37 220 cm−1). A search between 1 300 and 8 500 Å showed two new band systems near 1 350 and 1 500 Å which have been assigned tentatively to the CF2 molecule.

scholarly journals UV Study of the Fourth Positive Band System of CO and Oi135.6 nm From Electron Impact on CO and CO2

2019 ◽  
Author(s):  
J. M. Ajello ◽  
C. P. Malone ◽  
J. S. Evans ◽  
G. M. Holsclaw ◽  
A. C. Hoskins ◽  
...  
Keyword(s):  
Electron Impact ◽  
Band System ◽  
Positive Band

STRUCTURE OF THE BAND SPECTRUM OF THE CuBr MOLECULE: I. ROTATIONAL STRUCTURE OF THE C SYSTEM OF 63Cu81Br

1967 ◽  
Vol 45 (8) ◽  
pp. 2805-2807 ◽  
Author(s):  
P. Ramakoteswara Rao ◽  
K. V. S. R. Apparao
Keyword(s):  
Fine Structure ◽  
High Resolution ◽  
Structure Analysis ◽  
Band System ◽  
Rotational Structure ◽  
Band Spectrum ◽  
Rotational Analysis ◽  
Molecular Constants ◽  
Fine Structure Analysis

The C band system of 63Cu81Br, lying in the region 3 900–4 600 Å, has been photographed in emission under high resolution and rotational analysis of the (2–0), (1–0), (0–0), (0–1), (0–2), and (1–3) bands carried out. The system is shown to involve a 1Σ(C1Σ)–1Σ(X1Σ) transition. The molecular constants of 63Cu81Br obtained from this fine-structure analysis are as follows:[Formula: see text]

Mechanism for production of the Fourth Positive Band System of CO by electron impact on CO2

1971 ◽  
Vol 76 (16) ◽  
pp. 3733-3737 ◽  
Author(s):  
M. Krauss ◽  
S. R. Mielczarek ◽  
D. Neumann ◽  
C. E. Kuyatt
Keyword(s):  
Electron Impact ◽  
Band System ◽  
Positive Band

The 240 nm band system of methylamine: a preliminary analysis of the rotational structure of the 0–0 band of CH3ND2

1982 ◽  
Vol 60 (6) ◽  
pp. 844-854 ◽  
Author(s):  
Masamichi Tsuboi ◽  
Akiko Y. Hirakawa
Keyword(s):  
Absorption Spectrum ◽  
Preliminary Analysis ◽  
Band System ◽  
Excited Electronic State ◽  
Moment Of Inertia ◽  
Rotational Structure ◽  
Ultraviolet Absorption Spectrum ◽  
Amino Group ◽  
Methyl Group ◽  
The Moment

The ultraviolet absorption spectrum of CH3ND2 has been observed in the 231–242 nm (43 300–41 300 cm−1) region with 10 m Eagle and 7.3 m Ebert vacuum spectrographs. An analysis has been made of the rotational structure in the 238.1–236.7 nm (42 000–42 240 cm−1) region. It has been shown that, in the excited electronic state, the methyl group is rotating freely with respect to the amino group around the C—N bond as axis. Here the moment of inertia of the methyl group was found to be 3.4054 Å2 amu around the molecular axis, and that of the deuterated amino group ND2 3.4081 Å2 amu. The sum 6.8135 Å2 amu is appreciably greater than IA = 6.6280 Å2 amu, the moment of inertia for the overall rotation of the molecule.

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