Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11016044 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2019 | 17 Pages |
Abstract
Ro-vibrational spectra of different electronic states of molecules are often used as absolute wavelength or frequency standards. These standards are also used to mitigate any slow drift of laser frequency during an experiment. In the precision experiment, the two most commonly used molecular standards are iodine and tellurium, both are homo-nuclear diatomic molecules. The former is mostly used as standard for the long wavelength (600-900â¯nm) region, while the tellurium spectrum is widely used in short wavelength (400-550â¯nm) including near ultraviolet. A comprehensive data on tellurium spectra can be obtained from the tellurium atlas [1]. However near the 455â¯nm range where a number of important atomic resonance line, the atlas provides no significant data. We have performed high resolution modulation transfer spectroscopy (MTS) on tellurium molecule in a hot cell in the region close to 455â¯nm wavelength thereby obtained more than 100 new spectral lines which were not observed before. The linewidth of each of these peaks is about a few tens of MHz, making them suitable for laser frequency locking.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
T. Dutta, M. Mukherjee,