Abstract

Sodium lamps for street lighting have been produced by Philips for several decades. Continuing research has improved the quality of these lamps and modified them to meet the demands of professional users.

© 1983 Optical Society of America

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References

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  1. D. D. Konowalow, M. E. Rosenkrantz, M. L. Olson.
  2. B. C. Laskowski, S. R. Langhoff, J. R. Stallcop.
  3. L. Huwel, J. Maier, H. Pauly.

Huwel, L.

L. Huwel, J. Maier, H. Pauly.

Konowalow, D. D.

D. D. Konowalow, M. E. Rosenkrantz, M. L. Olson.

Langhoff, S. R.

B. C. Laskowski, S. R. Langhoff, J. R. Stallcop.

Laskowski, B. C.

B. C. Laskowski, S. R. Langhoff, J. R. Stallcop.

Maier, J.

L. Huwel, J. Maier, H. Pauly.

Olson, M. L.

D. D. Konowalow, M. E. Rosenkrantz, M. L. Olson.

Pauly, H.

L. Huwel, J. Maier, H. Pauly.

Rosenkrantz, M. E.

D. D. Konowalow, M. E. Rosenkrantz, M. L. Olson.

Stallcop, J. R.

B. C. Laskowski, S. R. Langhoff, J. R. Stallcop.

Other (3)

D. D. Konowalow, M. E. Rosenkrantz, M. L. Olson.

B. C. Laskowski, S. R. Langhoff, J. R. Stallcop.

L. Huwel, J. Maier, H. Pauly.

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Figures (2)

Fig. 1
Fig. 1

Part of the spectrum of a high-pressure lamp, (a) containing sodium alone, (b) containing a mixture of sodium and xenon. (The bands resulting from the interactions between sodium atoms, and between sodium and xenon atoms can be seen clearly), and (c) containing a mixture of sodium and mercury; the bands-originate from interaction between sodium and mercury atoms.

Fig. 2
Fig. 2

The energy E of the system of two atoms as a function of the distance between atoms R: (a) Ground state. (b) Excited state. ΔE1: Potential difference for atoms at a large distance from each other. This corresponds to the wavelength of a sharp spectral line. ΔE2: Potential difference close to a maximum in the vertical distance between the two curves. When the distance R between the atoms is varied, the potential difference remains almost the same as ΔE2. At higher pressures this maximum gives rise to a band in the spectrum.

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