Dissociation Energy and Ionization Potential of Silicon Monoxide

1969 ◽  
Vol 51 (2) ◽  
pp. 807-811 ◽  
Author(s):  
Donald L. Hildenbrand ◽  
Edmond Murad
Keyword(s):  
Ionization Potential ◽  
Dissociation Energy ◽  
Silicon Monoxide

The absorption spectra of the gaseous monoxides of silicon, germanium and tin in the Schumann region

1954 ◽  
Vol 224 (1158) ◽  
pp. 374-388 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Ionization Potential ◽  
Absorption Spectra ◽  
Latent Heat ◽  
Satisfactory Agreement ◽  
Silicon Germanium ◽  
Silicon Monoxide ◽  
Dissociation Energies

The absorption spectra of the molecules SiO, GeO and SnO have been examined in the region 1250 to 2000Å. A number of new band systems have been found, and vibrational analyses have been carried out. The determination of the dissociation enérgies of these molecules is discussed: the values derived spectroscopically for SiO, GeO and SnO are 185∙ 0 ±6∙ 8 , 155∙ 8 ±5∙ 3 and 126∙ 0 ±4∙ 9 kcal (0° K) respectively. The values for GeO and SnO are in satisfactory agreement with the results of thermochemical work, but the result for SiO suggests that the value of the latent heat of sublimation of silicon is higher than has been suggested, and indicates L si ⋍100 kcal. The correlation between the states of carbon monoxide and of silicon monoxide is briefly considered, and a provisional value for the ionization potential of SiO, 10∙5 1 eV, is derived.

scholarly journals On the Ionization Potential of Molecular Oxygen

1975 ◽  
Vol 53 (19) ◽  
pp. 1948-1952 ◽  
Author(s):  
James A. R. Samson ◽  
J. L. Gardner
Keyword(s):  
High Resolution ◽  
Ionization Potential ◽  
Molecular Oxygen ◽  
Dissociation Energy ◽  
Electron Spectroscopy ◽  
Rotational Structure ◽  
Appearance Potential ◽  
A Value ◽  
Vibrational Bands

The ionization potential of O2 has been measured by the technique of high resolution photo-electron spectroscopy taking into account the influence of rotational structure on the shape of the vibrational bands. A value of 12.071 ± 0.001 eV (1027.1 ± 0.1 Å) was found for the ionization potential. This value leads to a dissociation energy of D0(O2+X2Πg) = 6.661 ± 0.001 eV. A lowering of the ionization potential caused by a branch head when ΔN = −2 gave an appearance potential for ionization of 12.068 ± 0.001 eV (1027.4 ± 0.1 Å).

Emission Spectrum of the PO Molecule. Part II.2Σ–2Σ Transitions

1971 ◽  
Vol 49 (24) ◽  
pp. 3180-3200 ◽  
Author(s):  
R. D. Verma ◽  
M. N. Dixit ◽  
S. S. Jois ◽  
S. Nagaraj ◽  
S. R. Singhal
Keyword(s):  
Emission Spectrum ◽  
Ionization Potential ◽  
Dissociation Energy ◽  
Ground State ◽  
Rydberg States ◽  
Electronic States ◽  
Electronic Transitions ◽  
A Value ◽  
Upper Limit ◽  
First Ionization Potential

Rotational structure of emission bands of the PO molecule in the region 5300–3800 Å is analyzed. The spectrum is attributed to 5 electronic transitions A2Σ+–B2Σ+, F2Σ+–B2Σ+, G2Σ+–B2Σ+, H2Σ+–B2Σ+, and I2Σ+–B2Σ+, where F, G, H, and I are the new electronic states and A and B are the upper states of the well-known γ and β bands respectively. Practically all the new 2Σ states are found to be perturbed. A qualitative account of these perturbations together with a deperturbation of certain levels is given. A number of cases of predissociation are also observed. This predissociation is attributed to the presence of 4Πi, and A′2Σ+ states, which dissociate to the ground state atomic products. From this an upper limit of the dissociation energy of the ground state of PO is determined to be D0 = 49 536 cm−1. The A, D, E, G, H, and I states of this molecule are assigned as Rydberg states corresponding to the σ4s, π4p, δ3d, σ4p, σ3d, and σ5s orbitals, respectively. From them a value of 67 570 cm−1 is evaluated for the first ionization potential of PO. All the electronic states established for this molecule are described in terms of electron configurations.

NewO2+Bands. Dissociation Energy ofO2+and Ionization Potential ofO2

1933 ◽  
Vol 44 (9) ◽  
pp. 720-723 ◽  
Author(s):  
R. S. Mulliken ◽  
D. S. Stevens
Keyword(s):  
Ionization Potential ◽  
Dissociation Energy
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