Tunneling Splitting of Energy Levels and Rotational Constants in the Vinyl Radical C2H3†

2006 ◽  
Vol 110 (16) ◽  
pp. 5430-5435 ◽  
Author(s):  
Gennady V. Mil'nikov ◽  
Toshimasa Ishida ◽  
Hiroki Nakamura
Keyword(s):  
Energy Levels ◽  
Rotational Constants ◽  
Tunneling Splitting ◽  
Vinyl Radical

A New Method for Band Contour Analysis with Application to the Spectrum of Pyridine-4-d1

1973 ◽  
Vol 51 (10) ◽  
pp. 1031-1038 ◽  
Author(s):  
F. W. Birss ◽  
S. D. Colson ◽  
D. A. Ramsay
Keyword(s):  
Excited State ◽  
Ground State ◽  
Energy Levels ◽  
New Method ◽  
Contour Analysis ◽  
Rotational Constants ◽  
Near Ultraviolet ◽  
Asymmetric Rotor ◽  
Band Contour ◽  
Molecular Dimensions

A new method for generating band contours is described which is both rapid and accurate. One contour is generated from another using the differentials of the energy levels with respect to the rotational constants, thus avoiding the need for repeated diagonalization of the asymmetric rotor matrices.The method is applied to two C-type bands in the near ultraviolet π*–n transition of pyridine-4-d1. For the 0–0 band the following constants are obtained: A′ = 0.19843 ± 0.00008 cm−1, B′ = 0.17957 ± 0.00008 cm−1, C′ = 0.09426 ± 0.00020 cm−1, ν0 = 34 800.31 cm−1. These constants are slightly smaller than the ground state constants, indicating a very small increase in the molecular dimensions in the excited state.

Vibration-rotation bands of methyl fluoride and methyl fluoride- d 3

1966 ◽  
Vol 290 (1423) ◽  
pp. 490-507 ◽  
Keyword(s):  
Energy Levels ◽  
Molecular Constants ◽  
Methyl Halides ◽  
Methyl Fluoride ◽  
Rotational Constants ◽  
Vibrational Levels ◽  
Vibration Rotation ◽  
Two Sides ◽  
Unusual Type

Four parallel vibration-rotation bands of CD 3 F have been measured, and much of their fine structure has been resolved. In some of these bands, the K splitting of the central Q branches has been measured, and in one case the P and B lines of the subbands, corresponding to different K values, have been analysed. Eight perpendicular type bands of CD 3 F have been measured, and seven have been analysed. One of these, v 4 , shows much P-R structure of the subbands. Values have been derived for the rotational constants, Coriolis coefficients, and the α values which relate the rotational constants in different vibrational levels. The value found for A o is 2.56 1 cm -1 . One parallel and two perpendicular bands of methyl fluoride have been analysed, and the results have been considered with previous data on this molecule to estimate the molecular constants. The band v 5 shows an unusual type of perturbation which appears to affect the two sides of the band in different ways. The value found for A 0 is 5.08 1 cm -1 . The results show again, as found with other methyl halides, that interactions between energy levels often lead to perturbations which complicate the determination of the molecular constants.

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

Low-lying energy levels of the FeH molecule

1999 ◽  
Vol 97 (1) ◽  
pp. 93-103 ◽  
Author(s):  
DANIEL F. HULLAH, RICHARD F. BARROW, JOHN
Keyword(s):  
Energy Levels

Do Atomic Spectra Determine Energy Levels?

1995 ◽  
Vol 5 (8) ◽  
pp. 949-961 ◽  
Author(s):  
C. Billionnet
Keyword(s):  
Energy Levels ◽  
Atomic Spectra

Energy levels of neutral platinum (Pt I)

1992 ◽  
Vol 2 (4) ◽  
pp. 947-957 ◽  
Author(s):  
J. Blaise ◽  
J. Vergès ◽  
J.-F. Wyart ◽  
R. Engleman
Keyword(s):  
Energy Levels

Energy Levels and Electromagnetic Transition of 90-94mo Nuclei Using Ibm-1

2020 ◽  
pp. 149-152
Keyword(s):  
Experimental Data ◽  
Transition Probability ◽  
Energy Levels ◽  
Dynamical Symmetry ◽  
Interacting Boson Model ◽  
Excitation Energies ◽  
Electromagnetic Transition ◽  
Boson Model ◽  
Energy States ◽  
Good Agreement

The energy states for the J , b , ɤ bands and electromagnetic transitions B (E2) values for even – even molybdenum 90 – 94 Mo nuclei are calculated in the present work of "the interacting boson model (IBM-1)" . The parameters of the equation of IBM-1 Hamiltonian are determined which yield the best excellent suit the experimental energy states . The positive parity of energy states are obtained by using IBS1. for program for even 90 – 94 Mo isotopes with bosons number 5 , 4 and 5 respectively. The" reduced transition probability B(E2)" of these neuclei are calculated and compared with the experimental data . The ratio of the excitation energies of the 41+ to 21+ states ( R4/2) are also calculated . The calculated and experimental (R4/2) values showed that the 90 – 94 Mo nuclei have the vibrational dynamical symmetry U(5). Good agreement was found from comparison between the calculated energy states and electric quadruple probabilities B(E2) transition of the 90–94Mo isotopes with the experimental data .

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