Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/pram/031/06/0493-0504

Perturbations; configuration; molecular constants; rotational analysis; vibrational assignments

The ultraviolet bands ofA¹Π-X¹Σ⁺ system of As¹⁴N and its isotopic species As¹⁵N were excited in a quartz tube containing specpure nitrogen and traces of AsCl₃ vapour, using a microwave discharge (2450 MHz). Bands of As¹⁵N were obtained using¹⁵N₂ enriched to 95.5%. Rotational structure of several bands of As¹⁴N and As¹⁵N photographed under high dispersion (0.14 Å/mm) was reanalysed. Detailed studies of the observed perturbations in the levels ofν′ = 0 to 4 led to the identification of two³Σ⁻ and aC¹Σ⁻ states. Molecular parametersT_e, ω_e, ω_ex_e, B_eandα_ewere determined for all the electronic states studied. Vibrational assignments of the perturbing levels were made using the isotope shift studies.

P Saraswathy¹ G Krishnamurty¹

1. Spectroscopy Division, Bhabha Atomic Research Centre, Trombay, Bombay - 400 085, India

Published

December 1988

Manuscript received

14 December 1987

Manuscript revised

29 August 1988