KieferW. and BernsteinH. J., Appl. Spectrosc.25, 500 (1971).
2.
KieferW. and BernsteinH. J., Appl. Spectrosc.25, 609 (1971).
3.
KoningsteinJ. A. and GächterB. F., J. Opt. Soc. Am.63, 892 (1973).
4.
ZimmererN. and KieferW., Appl. Spectrosc.28, 279 (1974).
5.
The same principle underlies the “flow cell” method recommended for colored solutions and liquids, e.g., see WoodruffW. H. and SpiroT. G., Appl. Spectrosc.28, 576 (1974).
6.
EyselH. H., Spectrochim. Acta27A, 173 (1971).
7.
The diameter of the point focused beam is given by the formula (see Ref. 2) 2r = 4λ f/πd where λ and d are the wavelength and the diameter of the nonfocused laser beam, f is the focal length of the focusing length. Thus, for λ = 488.0 nm, f = 20 cm and d = 0.3 cm, the focused beam diameter 2r ∼ 41 μ.
8.
KieferW. and BernsteinH. J., Mol. Phys.23, 835 (1972).