Two-color studies of autoionizing states in small molecules

Conference · Fri Oct 20 04:00:00 EDT 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

DOI:https://doi.org/10.1063/1.38658· OSTI ID:6996858

Pratt, S T; O'Halloran, M A; Tomkins, F S; Dehmer, J L; Dehmer, P M ^[1]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (US)

Two-color resonantly enhanced multiphoton ionization (REMPI) is used to study rotational autoionization of molecular hydrogen and nitric oxide. In contrast to conventional, single-photon techniques, the REMPI technique can be used to study autoionizing levels of H{sub 2} that can decay only through very weak interactions such as {ital p}-{ital f} mixing and singlet-triplet mixing. In addition, rotational autoionization that occurs with that change in rotational quantum number greater than 2 can also be examined (i.e., {Delta}N{sup +}{gt}2). In homonuclear molecules, symmetry considerations require that {Delta}N{sup +} be even; in heteronuclear molecules, {Delta}N{sup +} may be even or odd. It is found, however, that NO is in some sense quasi-homonuclear, and that processes with {Delta}N{sup +} = even appear to be more efficient than processes with {Delta}N{sup +} = odd.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6996858
• Report Number(s): CONF-8810399--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 191:1
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CHALCOGENIDES
ELEMENTS
ENERGY LEVELS
EXCITED STATES
HYDROGEN
IONIZATION
MULTI-PHOTON PROCESSES
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOIONIZATION
ROTATIONAL STATES