Abstract
THE so-called ultraviolet bands of water vapour, which must probably be attributed to the OH-molecule1, have been the object of an extensive study. Heurlinger2 succeeded in arranging almost all the lines of the band 3064 into 12 branches which he called P1k, Q1k, R1k, P2k, Q2k, R2k (k = 1, 2). But it was not possible to give a theoretical interpretation of the bands, and to decide to which quantum states of the molecule the lines belong.3 Recently, Watson 1 measured the band 2811 and showed that it has exactly the same structure as the band 3064. These measurements, combined with those of Grebe and Holtz of the band 3064, enable us to get a complete insight into the structure of these bands. With the aid of the combination principle it is possible to get the relative values of the rotational terms without any theoretical assumption about the structure of the molecule. The results obtained are summarised below. (Details will be published in the Proc. Roy. Acad. Amsterdam.)
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References
W. W. Watson, Astroph. Journal, 60, p. 145 (1924).
T. Heurlinger, "Untersuchungen über die Struktur der Bandenspektra", Lund, 1918.
Cf. A. Sommerfeld, "Atombau und Spektrallinien", 3rd ed. p. 527.
H. A. Kramers and W. Pauli, Zeit. f. Phys., 13, p. 351 (1923).
A. Kratzer, Zeit. f. Phys., 23, p. 298 (1924).
R. Fortrat, Journal de Phys., 5, p. 20 (1924).
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DIEKE, G. The Structure of the so-called Ultraviolet Bands of Water Vapour. Nature 115, 194 (1925). https://doi.org/10.1038/115194a0
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DOI: https://doi.org/10.1038/115194a0
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