Abstract
A STUDY of the photoionization of 3,4-benzpyrene in boric acid glass has shown that two-photon ionization occurs in this system. The glass was prepared in the usual way1, formed into a strip and placed in the focal plane of a quartz spectrograph. The glass was irradiated with light from a high-pressure mercury lamp for periods, of several hours. The variation of ionization density with exciting wave-length was determined by measuring the optical absorption in a region where the ion alone absorbs (≍ 18,000 cm−1 (ref, 2)) and correcting for the intensity distribution of the exciting light3. The expected short-wave-length region of ionization was found with a low-energy cut off of 4.9 eV, together with a second region of considerably lower density extending from 4.1 to 3.0 eV. In the region 4.9–4.1 eV the density was too low to be measured and corresponds to a region of low exciting intensity.
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References
Evans, D. F., Nature, 176, 777 (1955).
Bennema, P., Hoijtink, G. J., Lupinski, J. H., Oosterhof, L. J., Selier, P., and van Voorst, J. D. W., Mol. Phys., 2, 431 (1959).
Melhuish, W. H., J. Opt. Soc. Amer., 52, 1256 (1962).
Buck, H. M., Van der Lugt, W. Th. A. M., and Oosterhof, L. J., Tetrahedron, 19, Supp. 2, 173 (1963).
Meyer, W. C., and Albrecht, A. C., J. Phys. Chem., 66, 1168 (1962).
Muel, B., and Hubart-Habart, M., J. Chem. Phys., 55, 377 (1958).
Joussot-Dubien, J., and Lesclaux, R., C.R. Acad. Sci., Paris, 258, 4260 (1964).
Birks, J. B., and Slifkin, M. A., Nature, 191, 761 (1962).
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RAY, J., HAMILTON, T. Two-photon Ionization of 3,4-Benzpyrene in Boric Acid Glass. Nature 206, 1040–1041 (1965). https://doi.org/10.1038/2061040b0
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DOI: https://doi.org/10.1038/2061040b0
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