Publication
Reference
Brith M., Schnepp O. (1965). The absorption spectra of solid CO and N2. Mol. Phys, 9, 473 - 489.
Names
  • M. Brith
  • O. Schnepp
Article and keywords
Title
The absorption spectra of solid CO and N2
Abstract
The absorption spectra of CO and N2 solids were investigated in the wavelength region 1600-1150 \ra at temperatures ranging from 10\textdegreek to 30\textdegreek. For CO two electronic transitions were observed: A 1II \textleftarrow X1 \ensuremath§igma+, 13 vibrational bands measured between 1570 \ra and 1250 \ra; d3 \ensuremathΔ \textleftarrow X1 \ensuremath§igma+, 7 vibrational bands measured between 1300 \ra and 1225 \ra. The spectra are simply related to the moleculartransitions and can be interpreted on the basis of existing theory of the excited states of molecular crystals of cubic symmetry. Davydov splitting has been clearly resolved for a number of bands of the A \textleftarrow X transition, and the experimental splitting energy can be quantitatively accounted for if the f-number of this transition is 0\textperiodcentered16. The observed relative intensities of the components are in agreement with theoretical prediction. For N2 also two electronic transitions have been observed: a1 IIg \textleftarrow X1 \ensuremath§igmag+, 8 vibrational bands measured between 1460 \ra and 1250 \ra; \ensuremathω1 \ensuremathΔ\ensuremathμ \textleftarrow X1 \ensuremath§igmag+, 11 bands measured between 1400 \ra and 1170 \ra. Here again Davydov splitting was observed but the theoretical interpretation of the splitting energy and the relative intensities of the components is complicated by the fact that the corresponding molecular transitions are dipole forbidden. The assignment of the lattentransition is confirmed.
Keywords
spectroscopy, VUV, ices, molecular solids, CO
Content
spectral data
Year
1965
Journal
Molecular Physics
Volume
9
Number
5
Pages
473 - 489
Document type
article
Publication state
published
Doi
10.1080/00268976500100641
Identifiers