• G Krishnamurty

      Articles written in Proceedings – Section A

    • Thed1Σ+c1Π system of NH

      N A Narasimham G Krishnamurty

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      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,

    • Rotational analysis of the 0-0 band of the A3 inv-X3 system of ND

      G Krishnamurty N A Narasimham

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      The 0-0 band of the A3inv−X3 system of ND was excited in an electrodeless microwave oscillator (2450 Mc./s.) discharge and photographed on a 6·6 meter concave grating spectrograph in the second order at a dispersion of 0·56 A/mm. Twenty-five out of the predicted twenty-seven branches have been identified in the rotational structure of the 0-0 band. From a rotational analysis, the following rotational constants have been determined:

      (i)X3state

      (ii)A3inv state —

    • Rotational analysis of the1Π-X1Σ system of AsN

      M N Dixit G Krishnamurty N A Narasimham

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      The1Π-X1Σ bands of AsN were excited by means of radio-frequency discharge through nitrogen and helium and traces of arsenic. The 0-0 band (2784.25 Å) and the 0-1 band (2868.74 Å) were photographed in the third order of a 6.6 meter concave grating spectrograph at a dispersion of 0.38 Å/mm. and analysed for their rotational structure. Perturbations observed in the1Π state were studied in detail.

    • Emission spectrum of PrO

      T V Venkitachalam G Krishnamurty N A Narasimham

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      The bands of PrO at 8488.95 A and 7986.44 A of system I and at 7662.85 A of system III have been photographed on 6.6 meter concave grating spectrograph at a dispersion of 1.2 A/mm and their rotational structure analysed. They are assigned transitions fromv′ = 0 and 1 levels of A2 Δ5/2 andv′ = 0 level of B2 Δ5/2 to a commonv′’ = 0 level of the ground, X2 Π3/2 state.

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