Emission spectrum of rare gas dimers in the vacuum UV region. II. Rotational analysis of band system I of Ar2

1979 ◽  
Vol 71 (4) ◽  
pp. 1780-1793 ◽  
Author(s):  
D. E. Freeman ◽  
K. Yoshino ◽  
Y. Tanaka
Keyword(s):  
Emission Spectrum ◽  
Band System ◽  
Rare Gas ◽  
Rotational Analysis ◽  
Region Ii ◽  
Vacuum Uv

Spectrum of AsS. I. Analysis of the A′2Π3/2–X2Π3/2 Band System

1971 ◽  
Vol 49 (10) ◽  
pp. 1249-1254 ◽  
Author(s):  
Midori Shimauchi
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Ground State ◽  
Band System ◽  
Vibrational Analysis ◽  
Quartz Tube ◽  
Rotational Analysis ◽  
Vibrational Constants

The emission spectrum of the AsS radical, excited in a quartz tube by a 2450 MHz oscillator, was photographed on a high resolution spectrograph from 2450 to 6900 Å. Seven bands around 6000 Å showing clear rotational structures were chosen for the first rotational analysis of the AsS spectrum. The bands were found to arise from a 2Π3/2–2Π3/2 transition. The rotational and vibrational constants of the two states derived from the present work are consistent with the previous vibrational analysis of the A′2Π3/2–X2Π3/2 system. The constants of the upper doublet component of the ground state, X2Π3/2, are ωe = 562.40 cm−1, ωexe = 2.02 cm−1, re = 2.0216 Å; the constants of the A′2Π3/2 state are ΔG′(1/2) = 403.37 cm−1, ν0,0 = 18 621.21 cm−1, re = 2.2500 Å.

The rotational analysis of the A1Π–X1Σ+ system of Si130Te

1992 ◽  
Vol 70 (5) ◽  
pp. 291-294 ◽  
Author(s):  
Sheila Gopal ◽  
M. Singh ◽  
G. Lakshminarayana
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Microwave Discharge ◽  
Band System ◽  
Rotational Structure ◽  
Quartz Tube ◽  
Rotational Analysis ◽  
Rotational Constants

The emission spectrum of Si130Te was excited by microwave discharge (2450 MHz) in a sealed quartz tube. The A1Π–X1Σ+ band system (3100–3900 Å) (1 Å = 10−10 m) photographed under high resolution on a 10.6 m Ebert grating spectrograph. The rotational analysis of 32 bands was carried out, which led to the determination of the accurate vibrational and rotational constants. The rotational structure belonging to ν′ > 9 levels appear to be perturbed.

Emission spectrum of rare gas dimers in the vacuum UV regions. III. Ne2

1981 ◽  
Vol 74 (5) ◽  
pp. 2760-2768 ◽  
Author(s):  
Y. Tanaka ◽  
W. C. Walker
Keyword(s):  
Emission Spectrum ◽  
Rare Gas ◽  
Vacuum Uv

Isotope Shifts and Rotational Analysis of the As32S+A1Π–X1Σ Band System

1975 ◽  
Vol 53 (8) ◽  
pp. 831-840 ◽  
Author(s):  
Midori Shimauchi ◽  
Shiro Karasawa
Keyword(s):  
Emission Spectrum ◽  
Discharge Tube ◽  
Band System ◽  
Dissociation Limit ◽  
Rotational Analysis ◽  
Molecular Constants ◽  
Isotope Shifts ◽  
Dissociation Energies ◽  
Quantum Numbers

The emission spectrum of As32S+ and As34S+ has been excited in a quartz discharge tube by a 27 MHz oscillator. Vibrational isotope shifts have verified the vibrational quantum numbers of the upper and lower states. The 2–0, 1–0, 1–1, 0–1, 2–1, and 1–2 bands were chosen for the first rotational analysis of the As32S+ spectrum. The analysis has established that the transition is 1Π–1Σ. The principal molecular constants are as follows:[Formula: see text]Calculated dissociation energies based on the above constants and observed Tc suggest that X1Σ and A1Π have a common dissociation limit, As+(3P) + S(3P). In the upper state several perturbations have been found.

Emission spectrum of rare gas dimers in the vacuum uv region. I. Ar2

1979 ◽  
Vol 70 (1) ◽  
pp. 380 ◽  
Author(s):  
Y. Tanaka ◽  
W. C. Walker ◽  
K. Yoshino
Keyword(s):  
Emission Spectrum ◽  
Rare Gas ◽  
Region I ◽  
Vacuum Uv

The emission spectrum of the CO2+ ion: rovibronic analysis of the band system

1979 ◽  
Vol 57 (10) ◽  
pp. 1634-1649 ◽  
Author(s):  
D. Gauyacq ◽  
C. Larcher ◽  
J. Rostas
Keyword(s):  
Experimental Data ◽  
Emission Spectrum ◽  
Band System ◽  
Theoretical Models ◽  
Rotational Analysis ◽  
Molecular Constants ◽  
Bending Vibration ◽  
Triatomic Molecules ◽  
First Time ◽  
Accurate Experimental Data

The Renner–Teller structure of the [Formula: see text] and Ã2Πu states of the CO2+ ion has been studied thanks to the identification and rotational analysis of the vibronic bands of the [Formula: see text] and [Formula: see text] systems, associated with the first quantum of the bending vibration in the [Formula: see text], Ã, and [Formula: see text] states. The bending structure of the à state has been understood and the corresponding parameters ω2 and ε have been determined for the first time. The simultaneous analysis of the 12CO2+ and 13CO2+ appropriate bands has led us to revise our earlier value of the Renner parameter for the [Formula: see text] state, derived from the [Formula: see text] system. In addition, three bands of the main progression ν′00–000 (ν′ = 0, 1, and 2) have been reanalyzed in order to obtain a consistent set of molecular parameters. The main molecular constants (in cm−1; r0 in Å) are summarized below for 12CO2+:[Formula: see text]The accurate experimental data derived from the CO2+ spectrum are discussed in the framework of the most recent theoretical models of the rovibronic structure of linear triatomic molecules.

ROTATIONAL ANALYSIS OF THE β BANDS OF PHOSPHORUS MONOXIDE

1959 ◽  
Vol 37 (2) ◽  
pp. 136-143 ◽  
Author(s):  
Nand Lal Singh
Keyword(s):  
Ground State ◽  
Band System ◽  
Electronic States ◽  
Rotational Analysis ◽  
Rotational Constants ◽  
Fine Structures ◽  
Π State

The fine structures of three of the β bands of PO which occur near 3200 Å have been analyzed. The analysis shows that the upper state of this band system is a 2Σ and not a 2Π state as previously believed. The rotational constants of both electronic states have been determined and it is found that the ground state constants, previously determined from the γ bands, are incorrect.

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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