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Climbing the Bending Vibrational Ladder in D13C15N by Hot Gas Emission Spectroscopy
1Mathematisches Institut, Universität Leipzig, Augustus-Platz, Leipzig, D-04109, Germany
High-temperature emission spectroscopy precisely measured the D13C15N isotopomer. This study reports detailed spectroscopic constants for various vibrational states, advancing molecular spectroscopy understanding.
Area of Science:
- Molecular Spectroscopy
- Quantum Chemistry
- High-Resolution Infrared Spectroscopy
Background:
- Accurate molecular parameters are crucial for understanding chemical processes and interstellar medium composition.
- Previous studies on HCN isotopomers provided foundational data but lacked high-temperature measurements for specific isotopes.
Purpose of the Study:
- To precisely measure the high-temperature rovibrational emission spectrum of the D13C15N isotopomer.
- To determine accurate spectroscopic constants for various vibrational and combination states of D13C15N.
- To validate spectral assignments using room temperature absorption data and theoretical intensity patterns.
Main Methods:
- Utilized a newly constructed Fourier transform emission apparatus for measurements at 1370 K.
- Covered the spectral range from 450 to 700 cm-1.
- Performed a comprehensive least-squares fit of approximately 2700 rovibrational lines for D13C15N.
Main Results:
- Successfully assigned hot bands with upper states up to v2 = 12.
- Assignments verified for states up to v2 = 5 against existing room temperature absorption data.
- Reported spectroscopic constants for bending states (v2 = 1-12) and combination states of D13C15N.
- Obtained spectroscopic constants for DCN, D13C14N, and D12C15N from absorption measurements.
Conclusions:
- The high-temperature emission spectrum provided detailed rovibrational data for D13C15N.
- The determined spectroscopic constants enhance the understanding of molecular structure and dynamics.
- This work contributes valuable data for astrophysical and chemical applications.
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