scholarly journals A Study of the Near‐Ultraviolet Spectrum of Vega

2005 ◽  
Vol 623 (1) ◽  
pp. 460-471 ◽  
Author(s):  
Alejandro Garcia‐Gil ◽  
Ramon J. Garcia Lopez ◽  
Carlos Allende Prieto ◽  
Ivan Hubeny
Keyword(s):  
Ultraviolet Spectrum ◽  
Near Ultraviolet

High-Field Stark Effects on the Near Ultraviolet Spectrum of the Hydroxyl Radical

1971 ◽  
Vol 49 (22) ◽  
pp. 2825-2832 ◽  
Author(s):  
Ethan A. Scarl ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Hydroxyl Radical ◽  
Electric Fields ◽  
High Field ◽  
Transition Probability ◽  
Ultraviolet Spectrum ◽  
Vibrational Transition ◽  
Near Ultraviolet ◽  
Stark Effects ◽  
Π State

Spectra due to the A2Σ+–X2Π transition of the hydroxyl radical in electric fields of over 300 000 V per cm have been obtained. The dipole moment of the A2Σ+ ν = 0 state of OH has been determined to be (1.98 ± 0.08) D. From the variation of the dipole moment with vibrational quantum number in the 2Π state, the transition probability for the pure vibrational transition ν = 1 →ν = 0 has been estimated to be A10 = 80s−1.

Near Ultraviolet Spectrum of Crystalline Hexachlorobenzene

1959 ◽  
Vol 30 (4) ◽  
pp. 868-873 ◽  
Author(s):  
O. Schnepp ◽  
R. Kopelman
Keyword(s):  
Ultraviolet Spectrum ◽  
Near Ultraviolet

Two New Band Systems in the Near Ultraviolet Spectrum of N2

1975 ◽  
Vol 53 (19) ◽  
pp. 2198-2209 ◽  
Author(s):  
P. K. Carroll ◽  
K. V. Subbaram
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Rydberg State ◽  
Molecular Nitrogen ◽  
Ultraviolet Spectrum ◽  
Dissociation Limit ◽  
Ultraviolet Emission ◽  
Weak Band ◽  
Near Ultraviolet ◽  
Unusual Type

Two new weak band systems have been identified under high resolution in the near ultraviolet emission spectrum of molecular nitrogen. They are found to arise from a transition from a hitherto unknown 1Πg state, which it is proposed to call k, to the a′ 1Σu− and w1Δu states. The upper state is interpreted as the 1ΠgRydberg state of configuration … (1πu)4 (3σg) 3dπg. Straightforward treatment of the data by conventional methods gives B0d = 1.906 cm−1, B1d = 1.824 cm−1, T0 = 113 630.87 cm−1, and ΔG1/2 = 2305.92 cm−1. Only the d levels, i.e., the levels corresponding to the 1Πg− component, are observed and the absence of the c levels is attributed to an unusual type of predissociation involving the predicted stable 1Σg+ state which goes to the dissociation limit 2D + 2D (14.522 eV) and the 3Σg− state which arises at the limit 4S + 2P (13.332 eV). A new level at 117 661.11 cm−1 with a Bd value of 1.695 cm−1 is identified as v = 2 of the y1Πg state. A strong homogeneous interaction is found to be occurring between the new k1Πg state and the y1Πg state. A deperturbation calculation is carried out and yields the following deperturbed constants: k1Πg: Be = 1.959 cm−1; αe = 0.031 cm−1; re = 1.109 Å; T0 = 113 723.58 cm−1; ΔG1/2 = 2182.32 cm−1, y1Πg: Be = 1.739 cm−1; αe = 0.017 cm−1; re = 1.177 Å; Te = 114 314.36 cm−1; ωe = 1906.43 cm−1; αexe = 37.51 cm−1.

The Near Ultraviolet Spectrum of ζ Tau

1976 ◽  
pp. 197-198 ◽  
Author(s):  
A. M. Delplace ◽  
K. A. van der Hucht
Keyword(s):  
Ultraviolet Spectrum ◽  
Near Ultraviolet

The near-ultraviolet spectrum of Markarian 205

1992 ◽  
Vol 398 ◽  
pp. 495 ◽  
Author(s):  
John N. Bahcall ◽  
Buell T. Jannuzi ◽  
Donald P. Schneider ◽  
George F. Hartig ◽  
Edward B. Jenkins
Keyword(s):  
Ultraviolet Spectrum ◽  
Near Ultraviolet

Ultraviolet Absorption Spectrum of Thionylimide (HNSO)

1972 ◽  
Vol 50 (4) ◽  
pp. 404-407 ◽  
Author(s):  
J. M. Allegretti ◽  
A. J. Merer
Keyword(s):  
Absorption Spectrum ◽  
Sulfur Atom ◽  
Extinction Coefficient ◽  
Electronic Excitation ◽  
Ultraviolet Spectrum ◽  
Ultraviolet Absorption ◽  
Ultraviolet Absorption Spectrum ◽  
Near Ultraviolet

Two regions of absorption have been discovered in the near ultraviolet spectrum of thionylimide (HNSO). These are a long series of diffuse bands between 2690 and 2387 Å, merging into a continuum with maximum extinction coefficient near 2170 Å, and a weak structureless absorption between 3250 and 3500 Å. The vibrational pattern of the 2690–2387 Å system is almost unchanged on deuteration, indicating that the electronic excitation is centered at the sulfur atom.

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