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Effect of the unexcited vapour region inside a heatpipe on the observation of UV diffuse bands in 337.1 nm excitation of Na2

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Abstract

We report on some interesting aspects of the strong influence of the unexcited vapour zone inside a heatpipe on the observation of 366.6 and 380.0 nm UV diffuse bands of sodium. For a smaller unexcited sodium vapor zone, only the 366.6 nm band is observed, while for larger unexcited volumes, both 366.6 and 380.0 nm bands can be identified. Partial reabsorption of the 366.6 nm band leading to Stokes emission as 380.0 nm band appears most likely. Reduced power dependences observed for the 366.6 nm band, an indication of the Amplified Spontaneous Emission (ASE) nature of the emission, support this analysis. A simple kinetic for the system is discussed. The results are quite general and suggest some caution in the interpretation of the data from a number of Laser-Induced Fluorescence (LIF) experiments currently being reported.

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Authors and Affiliations

  1. Postgraduate Centre for Electro-Optics, P.O. Box 83401, Tripoli, Libya

    S. Shahdin, M. A. Mgheder, F. A. Elmaghor, S. M. Sharada & A. T. Bouzed

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  1. S. Shahdin
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  2. M. A. Mgheder
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  3. F. A. Elmaghor
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  4. S. M. Sharada
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  5. A. T. Bouzed
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Shahdin, S., Mgheder, M.A., Elmaghor, F.A. et al. Effect of the unexcited vapour region inside a heatpipe on the observation of UV diffuse bands in 337.1 nm excitation of Na2 . Appl. Phys. B 62, 319–322 (1996). https://doi.org/10.1007/BF01080963

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  • DOI: https://doi.org/10.1007/BF01080963

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