Double-resonance spectroscopy of a complex resonance in molecular nitrogen

Journal Article · Wed Apr 01 04:00:00 EST 1992 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.45.4697· OSTI ID:7300919

McCormack, E. F. ^[1]; Pratt, Stephen T. ^[1]; Dehmer, Patricia M. ^[1]; Dehmer, Joseph L. ^[1]

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1. Argonne National Laboratory (ANL), Argonne, IL (United States)

Double-resonance spectroscopy via several rotational levels of the N₂ a ¹Π_g, v´=5 state has been used to probe the rotational structure of a complex autoionizing resonance observed just below the X ²Σ_g⁺, v⁺=1 threshold. A multichannel-quantum-defect-theory (MQDT) analysis confirms that the complex resonance is produced by the interaction of two interloping states with the np and nf Rydberg series converging to the X ²Σ_g⁺, v⁺=1 limit. The quantum defects of the interlopers and their interaction strengths with the two Rydberg series are determined from fits of the MQDT model to the energies of the peaks observed in the complex resonance. The experimentally determined interaction parameters and those available from ab initio calculations are in fair agreement. The present results complete the interpretation of the photoionization spectrum of N₂ in the energy region between the X ²Σ_g⁺, v⁺=0 and 1 thresholds.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Office of Health and Environmental Research; USDOE Office of Health and Environmental Research. Alexander Hollaender Program
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7300919
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 7 Vol. 45; ISSN 1050-2947; ISSN PLRAAN
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ALKALI METALS
AUTOIONIZATION
COUPLING
DATA
DOUBLE RESONANCE METHODS
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
INFORMATION
IONIZATION
METALS
MOLECULES
NUMERICAL DATA
RESONANCE ABSORPTION
ROTATIONAL STATES
RYDBERG STATES
SODIUM
SORPTION
THEORETICAL DATA
THRESHOLD ENERGY