Atlas and wavenumber tables for visible part of the rovibronic multiline emission spectrum of the $D_2$ molecule. II. Wavenumber range $18161 \div 14379$ cm$^{-1}$ measured with moderate resolution

TL;DR

This paper presents a detailed atlas of the visible emission spectrum of the D2 molecule, providing new wavenumber data for over 5400 spectral lines with moderate resolution, aiding spectral analysis.

Contribution

The study offers a comprehensive wavenumber atlas of the D2 molecule's visible spectrum with numerical deconvolution and calibration, expanding existing spectral line data.

Findings

New wavenumber values for 5445 spectral lines

High-resolution spectral atlas with detailed line assignments

Enhanced spectral data accuracy through numerical deconvolution

Abstract

The visible part ($\approx 550 \div 696$ nm) of the multiline electronic-vibro-rotational emission spectrum of the $D_2$ molecule was recorded with moderate resolution (line widths $\approx 0.013$ nm). The resolution was limited by Doppler broadening of spectral lines. After numerical deconvolution of the recorded intensity distributions and proper calibration of the spectrometer the new set of wavenumber values was obtained. The results are reported in the form of an atlas divided into 43 sections covering about 1.5 nm, containing pictures of images in the focal plane of the spectrometer, intensity distributions in linear and logarithmic scales and the table containing wavenumber and relative intensity values for 5445 spectral lines together with existing line assignments.