Collision induced ultraviolet structure in nitrogen radar REMPI spectra

Journal Article · Sun Dec 28 00:00:00 EST 2014 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.4904261· OSTI ID:22415416

Miles, R. ^[1]

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1. Mechanical and Aerospace Engineering Department, Princeton University, Princeton, New Jersey 08544 (United States)

We present 2 + 2 radar REMPI measurements in molecular nitrogen under atmospheric conditions and observe a strong interference in the (1,0) vibrational band of the a{sup 1}Π{sub g} ← X{sup 1}Σ{sub g}{sup +} electronic manifold. The interference is suppressed by using circularly polarized light, permitting rotational analysis of the 2 + 2 radar REMPI spectrum. It is observed in pure nitrogen, though the structure varies with gas composition. The structure also varies with temperature and pressure. These results indicate that it is collision induced. We hypothesize that the source of the interference is a 3 + 1 REMPI process through the a{sup ″1}Σ{sub g}{sup +} electronic state.

• OSTI ID: 22415416
• Journal Information: Journal of Chemical Physics, Vol. 141, Issue 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTRONIC STRUCTURE
INTERFERENCE
MOLECULES
NITROGEN
PRESSURE DEPENDENCE
RADAR
TEMPERATURE DEPENDENCE
ULTRAVIOLET RADIATION
VIBRATIONAL STATES
VISIBLE RADIATION