FERMI DIAD 10°0 AND 02°0 OF NITROUS OXIDE

1956 ◽  
Vol 34 (11) ◽  
pp. 1147-1152 ◽  
Author(s):  
K. Narahari Rao ◽  
Harald H. Nielsen
Keyword(s):  
Nitrous Oxide ◽  
Fine Structure ◽  
Ground State ◽  
Molecular Constants

Measurement of the fine structure of the bands ν1 and 2ν20 of nitrous oxide has led to an evaluation of the centrifugal stretching constants of the Fermi diad 10°0 and 02°0. It was found that as compared to the value in the ground state, the change in the centrifugal stretching constant of the 02°0 level is much more than in the 10°0 level. This result has been discussed in relation to the theory of Nielsen, Amat, and Goldsmith (1956). The following revised values have been obtained for some of the molecular constants of N214O16:[Formula: see text]

Vibration-rotation bands of nitrous oxide

1951 ◽  
Vol 208 (1094) ◽  
pp. 326-331 ◽  
Keyword(s):  
Nitrous Oxide ◽  
Fine Structure ◽  
Ground State ◽  
Wave Length ◽  
The Other ◽  
Resolving Power ◽  
Microwave Measurements ◽  
Rotational Constants ◽  
Infra Red ◽  
Vibration Rotation

The infra-red absorption of nitrous oxide gas near 4·5 μ has been re-investigated using high resolving power. The rotational fine structure has been split up and shown to involve two vibrational transitions, one due to absorption of a fundamental from the ground state, and the other to a π → π transition from an excited vibrational level. The transitions have been analyzed theoretically and rotational constants obtained. The results serve to emphasize the importance of using more precise wave-length standards for infra-red measurements than have been used hitherto, if the rotational constants are to be obtained with accuracy com­parable to that achieved by microwave measurements. Excellent agreement with the latter has now been found.

BAND SPECTRUM AND STRUCTURE OF THE BCl MOLECULE

1941 ◽  
Vol 19a (11) ◽  
pp. 127-137 ◽  
Author(s):  
G. Herzberg ◽  
W. Hushley
Keyword(s):  
Fine Structure ◽  
Internuclear Distance ◽  
Ground State ◽  
Vibrational Structure ◽  
Sixth Order ◽  
Band Spectrum ◽  
Molecular Constants ◽  
Rotational Constants ◽  
New Formula

The 1Π−1Σ+ system of the BCl molecule has been photographed in the sixth order of a 20 ft. grating. The previous interpretation of the vibrational structure by Miescher (5) is slightly modified. The new formula for the Q heads of the B11Cl35 molecule is[Formula: see text]The fine structure of a number of bands has been measured and analysed, leading to the following accurate values for the rotational constants: B′e = 0.7054 cm.−1, α′e = 0.00820 cm.−1, B″e = 0.6838 cm.−1, α″e = 0.00646 cm.−1. The internuclear distance in the ground state is r″e = 1.716.10−8 cm. The molecular constants of BCl are compared with those of the iso-electronic molecules CS, PN, and SiO as well as with those of BBr, BCls, and BBr3.

Molecular Constants of the Ground State of the I2 Molecule

1951 ◽  
Vol 19 (9) ◽  
pp. 1210-1211 ◽  
Author(s):  
D. H. Rank ◽  
William. M. Baldwin
Keyword(s):  
Ground State ◽  
Molecular Constants

Refined molecular constants for the states of H2

1985 ◽  
Vol 63 (11) ◽  
pp. 1416-1417 ◽  
Author(s):  
Michel Larzillière ◽  
Françoise Launay ◽  
Jean-Yves Roncin
Keyword(s):  
Ground State ◽  
Molecular Constants

Refined molecular constants for the states C, D, D′, and D″ [Formula: see text] of H2 have been obtained using the best values of the ground-state constants derived recently by Dabrowski. A few high J values of C and D states are reassigned.

Rotational Analysis of the lΠ–XlΣ+ System of C80Se

1974 ◽  
Vol 52 (9) ◽  
pp. 813-820 ◽  
Author(s):  
René Stringat ◽  
Jean-Paul Bacci ◽  
Marie-Hélène Pischedda
Keyword(s):  
Emission Spectrum ◽  
Ground State ◽  
High Frequency ◽  
Rotational Analysis ◽  
Molecular Constants ◽  
High Frequency Discharge ◽  
Perturbed State ◽  
Simple Evaluation ◽  
Π State

The strongly perturbed 1Π–X1Σ+ system of C80Se has been observed in the emission spectrum of a high frequency discharge through selenium and carbon traces in a neon atmosphere. The analysis of five bands yields, for the molecular constants of the ground state, the values Be″ = 0.5750 cm−1, [Formula: see text], αe″ = 0.00379 cm−1, re″ = 1.676 Å, ΔG″(1/2) = 1025.64 cm−1, and ΔG″(3/2) = 1015.92 cm−1. The numerous perturbations in the 1Π state prohibit the simple evaluation of the constants of the perturbed state and of the perturbing ones.

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