Electron impact study of the energy levels of trans-1,3-butadiene: II. Detailed analysis of valence and Rydberg transitions. [9. 5 to 49 eV]

Journal Article · Wed Oct 15 04:00:00 EDT 1980 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.440587· OSTI ID:5002323

Doering, J P; McDiarmid, R

In this electron energy loss investigation of the electronic states of trans-1,3-butadiene, high energy resolution (25 meV) and a wide range of incident energies (9.5 to 49 eV) have been employed to locate and assign valence and Rydberg transitions in the typically congested 5--9 eV (2500 to 1400 A) region of the spectrum of a polyatomic molecule. Comparisons of the observed relative differential scattering cross sections (DCS) of various features in the lower energy (5.0 to 6.8 eV) region with the unambiguous assignments of these features from optical absorption and multiphoton ionization spectra allowed certain conclusions to be drawn regarding the typical DCS of Rydberg and valence singlet--singlet transitions. These ''rules'' have been applied to the congested 7--9 eV energy loss region of the butadiene spectrum. A diffuse process near 7.3 eV has been assigned as a forbidden valence transition, probably /sup 1/A/sub g/reverse arrow/sup 1/A/sub g/, on the basis of its relative DCS. The identification of the 7.07 and 8.00 eV transitions as successive members of the same Rydberg series is supported, and both transitions are demonstrated to contain considerable valence component.

• Research Organization: Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218
• OSTI ID: 5002323
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 73:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
BUTADIENE
COLLISIONS
CORRECTIONS
CROSS SECTIONS
DIENES
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY LEVELS
ENERGY LOSSES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
HYDROCARBONS
INELASTIC SCATTERING
LOSSES
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
POLYENES
RYDBERG CORRECTION
SCATTERING
SPECTRA
ULTRAVIOLET SPECTRA
VALENCE