The 3A2 state of thiocarbonyl difluoride

1970 ◽  
Vol 48 (16) ◽  
pp. 2623-2625 ◽  
Author(s):  
D. C. Moule
Keyword(s):  
High Resolution ◽  
Potential Function ◽  
Electronic Transition ◽  
Band System ◽  
Out Of Plane

The 4500 Å band system of thiocarbonyl difluoride F2CS has been photographed under conditions of moderately high resolution and has been assigned to the activity of the v1, v2, v3, and v4 modes arising from the 3A2 ← 1A1 electronic transition. The out-of-plane wagging levels were found to be strongly anharmonic, the observed inversion doubling indicating that the maximum in the potential function was greater than 3100 cm−1.

The 3300 Å band system of cyclobutanone

1969 ◽  
Vol 47 (11) ◽  
pp. 1235-1236 ◽  
Author(s):  
D. C. Moule
Keyword(s):  
High Resolution ◽  
Electronic State ◽  
Potential Function ◽  
Band System ◽  
Ultraviolet Spectrum ◽  
Vibrational Levels ◽  
Minimum Potential

The ultraviolet spectrum of cyclobutanone vapor has been recorded under conditions of high resolution. The oxygen wagging vibrational levels have been found to be strongly anharmonic in the 1A2 electronic state and have been fitted to a double minimum potential function.

THE 1600 Å BAND SYSTEM OF AMMONIA

1961 ◽  
Vol 39 (4) ◽  
pp. 479-501 ◽  
Author(s):  
A. E. Douglas ◽  
J. M. Hollas
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Electronic State ◽  
Band System ◽  
Excited Electronic State ◽  
Degenerate State ◽  
Coriolis Interaction ◽  
Plane Vibration ◽  
Vibrational Levels ◽  
Out Of Plane

The progression of ammonia bands which extends from 1689 to 1400 Å has been photographed in absorption at high resolution. Six bands have been analyzed and found to be of the perpendicular type. The analysis shows that the molecule is planar in the excited state and that vibrational levels observed in the progression are those of the out-of-plane vibration. The excited electronic state is of the E′′ type. In addition to the normal Coriolis interaction of the degenerate levels, a second effect has been observed which behaves like the Coriolis interaction recently described as 'giant l-type doubling' by Garing, Nielsen, and Rao. No clear evidence has been found for any distortion of the degenerate state from D3h symmetry.

STRUCTURE OF THE BAND SPECTRUM OF CuCl MOLECULE: II. ROTATIONAL STRUCTURE OF THE F–X BAND SYSTEM OF Cu65Cl35

1962 ◽  
Vol 40 (4) ◽  
pp. 412-422 ◽  
Author(s):  
P. Ramakoteswara Rao ◽  
R. K. Asundi ◽  
J. K. Brody
Keyword(s):  
High Resolution ◽  
Electronic Transition ◽  
Band System ◽  
Rotational Structure ◽  
Band Spectrum ◽  
Rotational Analysis ◽  
Molecular Constants ◽  
X Band ◽  
Π State

The F–X band system of Cu65Cl35 extending from 3700 to 4200 Å has been photographed in emission under high resolution. Rotational analysis of the (3,0), (2,0), (1,0), (0,0), (0,1), and (0,2) bands of the system has been made. The electronic transition involved is found to be 1Π–1Σ. The Λ-type doubling in the 1Π state is negligible. The principal molecular constants obtained are as follows (cm−1 units)[Formula: see text]

The A–X system of the CuCl molecule

1981 ◽  
Vol 59 (2) ◽  
pp. 289-297 ◽  
Author(s):  
G. P. Mishra ◽  
S. B. Rai ◽  
K. N. Upadhya
Keyword(s):  
High Resolution ◽  
Ground State ◽  
Electronic Transition ◽  
Band System ◽  
Rotational Structure ◽  
Molecular Constants ◽  
X Band ◽  
Standard Deviations ◽  
Concave Grating ◽  
Π State

The A–X band system of CuCl has been photographed in emission under high resolution in the 2nd order of a 10.6 m concave grating spectrograph. Rotational structure in four bands, viz. (1,0), (0,0), (0,1), and (1,2) has been analysed. The present analysis confirms that in the A–X system the electronic transition involved is 1Π–1Σ where 1Σ is the ground state of the molecule. The Λ-type doubling in the 1Π state is found to be appreciable. The molecular constants for the excited A state of 63Cu35Cl are (with standard deviations in parentheses): Be = 0.168432(7) cm−1; αe = 0.001067(7); De = 0.1134(11) × 10−6; q = 0.000871(9); qD = 0.85(18) × 10−8; ν10 = 19 500.271(8); ν00 = 18 999.104(7); ν01 = 18 579.735(10); and ν12 = 18 574.745(11).

STRUCTURE OF THE BAND SPECTRUM OF THE CuI MOLECULE: I. ROTATIONAL STRUCTURE OF THE E SYSTEM OF 63Cu127I

1966 ◽  
Vol 44 (10) ◽  
pp. 2241-2245 ◽  
Author(s):  
P. Ramakoteswara Rao ◽  
K. V. S. R. Apparao
Keyword(s):  
High Resolution ◽  
Electronic Transition ◽  
Band System ◽  
Rotational Structure ◽  
Band Spectrum ◽  
Rotational Analysis ◽  
Rotational Constants

The E band system of 63Cu127I, lying in the region 3 700 to 4 700 Å, has been photographed in emission under high resolution. Rotational analysis of the (0–4), (0–3), (0–2), (0–1), (0–0), (1–1), (1–0), (2–0), and (3–2) bands has been made. The electronic transition involved is found to be 1Σ (E1Σ)–1Σ(X1Σ). The rotational constants obtained are as follows:[Formula: see text]

The b1Σ+–X3Σ− band system of SO

1968 ◽  
Vol 46 (13) ◽  
pp. 1539-1546 ◽  
Author(s):  
R. Colin
Keyword(s):  
High Resolution ◽  
Microwave Discharge ◽  
Band System ◽  
Rotational Constants

The 0–0, 1–1, 2–2, and 0–1 bands of the b1Σ+–X3Σ− transition of the SO molecule have been observed in the afterglow produced when COS + O2 is pumped rapidly through a microwave discharge. The two strongest bands, 0–0 and 1–1, which lie respectively at 9549.08 and 9626.13 Å, have been photographed at high resolution and have been analyzed. Using the known X3Σ− rotational constants, the vibrational and rotational constants of the 1Σ+ state (Tc = 10 509.97 cm−1) have been determined: ωc′ = 1067.66 cm−1, Bc′ = 0.70262 cm−1, and rc′ = 1.5005 Å. Rotational intensity distributions for 1Σ+–3Σ− transitions are discussed. The a1Δ state of SO is predicted to lie at T ~ 6350 cm−1.

Vibrational Analysis of the 2800 Å Band System of para-Dibromobenzene

1972 ◽  
Vol 50 (12) ◽  
pp. 1402-1408 ◽  
Author(s):  
S. M. Japar
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Ground State ◽  
Band System ◽  
Vibrational Analysis ◽  
Type A ◽  
Strong Type ◽  
Type B ◽  
Sequence Structure ◽  
Extensive Sequence

The 2800 Å band system of p-dibromobenzene has been photographed under high resolution and an extended vibrational analysis has been carried out. The analysis is not inconsistent with the assignment of the system to a 1B2u ← 1Ag transition, by analogy with other p-dihalogenated benzenes. The observed spectrum can be explained in terms of a number of strong type-B vibronic bands and a considerably smaller number of type-A vibronic bands. The extensive sequence structure is adequately accounted for, and can be related to observations on other halogenated benzene molecules. Thirteen ground state and nine excited state fundamental vibrational frequencies have been assigned.

High-Resolution Spectroscopy of the A4Πr→ X4Σ-Band System of MoN

2000 ◽  
Vol 62 (5) ◽  
pp. 417-424
Author(s):  
Nils Andersson ◽  
Boris Minaev
Keyword(s):  
High Resolution ◽  
Band System ◽  
High Resolution Spectroscopy

A Chemical and Structural Study of the AlN-Si Interface

1997 ◽  
Vol 468 ◽  
Author(s):  
R. Beye ◽  
T. George
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Chemical Interaction ◽  
Interfacial Phenomena ◽  
Peak Shape ◽  
Transmission Electron ◽  
Nitride Formation ◽  
Out Of Plane ◽  
Electron Energy Loss

AbstractSamples of AlN grown on silicon [111] substrates were examined using electron energy loss spectroscopy (EELS) and selected area diffraction (SAD) with high-resolution transmission electron microscopy (TEM) to determine the source of out-of-plane tilts and in-plane rotations of the AlN crystallites at the Si interface. SAD results indicate that the interfacial crystallites are sheared along vertical planes, with random, intercrystalline rotation. The interfacial phenomena are believed to be the result of Si-Al-N interaction. Analytical experiments show no evidence of silicon nitride formation, witnessed by nitrogen-K peak shape, up to the Si interface. No evidence of substrate-epilayer interdiffusion was observed. Chemical interaction within one monolayer of the interface is therefore suspected as the cause of the epilayer tilts and rotations.

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