title: The electronic spectrum of adenine by electron impact methods.
abstract: The electron energy loss spectrum of adenine has been recorded over an excitation energy range of approximately 3-22 eV for scattering angles of 3 degrees and 6 degrees. In addition to reporting accurate vapor phase peak positions, the present work supports the long-held contention that the group of peaks in the 6- to 10-eV range belong to transitions that originate from valence pi orbitals. In the vapor phase spectrum, a Rydberg transition corresponding to an n----3s excitation is readily observed with a term value of 3.45 eV relative to the first long-pair ionization potential.
authors.affiliation: Argonne National Laboratory, Illinois 60439.
authors.forename: M A
authors.initials: MA
authors.lastname: Dillon
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: D
authors.initials: D
authors.lastname: Spence
mesh_terms: D000225:Adenine; D004583:Electrons; D013057:Spectrum Analysis / Q000379:methods
chemical_list: D000225:Adenine