New sets of experimental wavenumber values for triplet-triplet rovibronic transitions of $H_2$ and $D_2$

TL;DR

This paper presents new, highly accurate experimental wavenumber data for triplet-triplet rovibronic transitions in hydrogen molecules, achieved through digital deconvolution and precise calibration, expanding spectral data in the visible range.

Contribution

It provides the first high-precision wavenumber measurements for these transitions, improving accuracy and enabling better spectral analysis of $H_2$ and $D_2$.

Findings

Achieved measurement accuracy of 0.006 to 0.05 cm$^{-1}$.

Line centers determined with an accuracy of less than 0.0006 nm.

Expanded spectral data for triplet-triplet transitions in the visible range.

Abstract

New sets of experimental wavenumber values for triplet-triplet rovibronic transitions of $H_2$ and $D_2$ for visible part of spectrum ($400 \div 700$ nm) have been obtained. The digital intensity registration providing a linear response of the detector gave us the opportunity of digital deconvolution of the recorded line profiles. For line centers that made it possible to reach an accuracy ($< 0.0006$ nm) limited only by selfconsistency of various wavenumber standards. New sets of wavenumber values were obtained with accuracy $0.006 \div 0.05$ cm$^{-1}$.