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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/064/02/0097-0110

    • Keywords

       

      Rotational Constant; Band System; Energy Level Diagram; Rotational Structure; Rotational Analysis

    • Abstract

       

      The singlet systems of NH have been excited in a mildly condensed transformer discharge through flowing ammonia gas. The 0-0 bands, 2530 Å ofd1Σ+c1Π and 3240 Å ofc1Πa1Δ systems, appear with considerable intensity compared to the 4502 Å band of thec1Πb1Σ+ system. Besides the 2530 Å bands, two weaker bands at 2683 Å and 2516 Å are also excited. They are photographed in the second order of a Jarrell Ash 3·4 m. grating spectrograph at a dispersion of 2·6 Å/mm. Rotational analysis of the two weaker bands show that they belong to thed1Σ+c1Π system and further supports their assignment as the 0–1 and 1-1 bands. The vibrational and rotational constants derived for thed1Σ+ andc1Π states are,

    • Author Affiliations

       

      N A Narasimham1 G Krishnamurty1

      1. Spectroscopy Division, Atomic Energy Establishment Trombay, 414A, Cadell Road, Bombay-28
    • Dates

       
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