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The 4(3)Pig and 6(3)Pig States of Na2: Observation and Assignment
Journal of Molecular Spectroscopy
|December 16, 1998
Summary
Researchers identified two 3Pig states in sodium dimer (Na2) using pulsed perturbation facilitated optical-optical double resonance (PFOODR) spectroscopy. These states, the 5dpi and 6dpi, were precisely located in the 35,000-38,000 cm-1 energy range.
Area of Science:
- Atomic and Molecular Physics
- Spectroscopy
- Quantum Chemistry
Background:
- The electronic structure of diatomic molecules like sodium dimer (Na2) is crucial for understanding chemical bonding and reactivity.
- Rydberg states, characterized by a highly excited electron, play a significant role in molecular spectroscopy and photochemistry.
Purpose of the Study:
- To investigate and characterize previously unobserved 3Pig states in the Na2 molecule.
- To determine the precise energy levels and properties of these Rydberg states.
Main Methods:
- Utilizing pulsed perturbation facilitated optical-optical double resonance (PFOODR) fluorescence excitation spectroscopy.
- Analyzing spectral data to assign observed states and derive molecular constants.
Main Results:
- Observation of two distinct 3Pig states in Na2 within the 35,000-38,000 cm-1 energy region.
- Assignment of these states to the 5dpi and 6dpi Rydberg states based on their energy rank.
- Reporting of molecular constants and RKR (Rydberg-Klein-Rees) potential curves for the identified states.
Conclusions:
- The study successfully identified and characterized two new 3Pig Rydberg states in Na2.
- The reported molecular constants and potential curves provide valuable data for theoretical and experimental studies of Na2 electronic structure.
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