The Continuous Absorption Spectrum of Bromine: A New Interpretation
| Autor: | R. G. Aickin, N. S. Bayliss, A. P. Acton |
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| Rok vydání: | 1936 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 4:474-479 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1749887 |
| Popis: | The continuous absorption spectrum of bromine was investigated quantitatively at six temperatures from 293°K to 906°K, and the contributions of the vibrational levels v″ = 0 and v″ = 1 to the total continuum were deduced from the variation of the absorption coefficients with temperature. Contrary to expectation, the absorption from the level v″ = 1 has three maxima and not two, and the absorption from v″ = 0 has a decided hump on the long wavelength side of the maximum. These results can be explained if the bromine continuum is composed of two overlapping continua, the stronger one (A) with its maximum at λ4150, and the weaker (B) with its maximum at λ4950. Although it is possible to assign A to the transition 3Π0+u←1Σg+, and B to 3Π1u←1Σg+, better agreement with the Franck‐Condon principle is obtained if A is assigned to 1Πu←1Σg+, and B to 3Π0+u←1Σg+. The latter interpretation is also correlated with what is known of the chlorine and iodine continua. On either assumption, the value of re for 3Π1u of brom... |
| Databáze: | OpenAIRE |
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