A heated absorption cell for studying infrared absorption bands

Area of Science:

• Spectroscopy
• Physical Chemistry

Background:

• High-temperature gas analysis requires specialized equipment.
• Conventional cells face challenges with thermal stress on window materials.

Purpose of the Study:

• To design and test a novel 1-meter absorption cell for high-temperature gas ir spectra.
• To investigate the ir absorption spectrum of hydrogen chloride-37 (HCl-37) above 800°C.

Main Methods:

• Development of a 1-m absorption cell with robust window material integration (e.g., NaCl, KBr).
• High-temperature spectroscopic analysis of HCl-37 gas.

Main Results:

• Successfully observed ir absorption spectra of gases at temperatures exceeding 800°C.
• Identified more than twenty-five previously unobserved spectral lines in the 1-0 band of HCl-37.
• Evaluated molecular constants for HCl-37.

Conclusions:

• The designed absorption cell is effective for high-temperature gas ir spectroscopy.
• New spectral data for HCl-37 advances molecular understanding.
• The cell's utility extends to other molecular research applications.