High-resolution Auger-electron spectrum of HCl and DCl

Journal Article · Sun Oct 15 04:00:00 EDT 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.4369· OSTI ID:5355745

Svensson, S; Karlsson, L; Baltzer, P; Keane, M P; Wannberg, B ^[1]

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1. Department of Physics, Uppsala University, S-751 21 Uppsala, Sweden (SE)

The electron-impact excited high-resolution {ital L}{sub 2,3}VV Auger-electron spectra of HCl and DCl are presented. Four narrow bands are discerned that show a rich fine structure. Comparison between the HCl and DCl spectra shows this fine structure to be due to transitions to vibrational sublevels in the (2{pi}{sup {minus}2}){sup 3}{Sigma}{sup {minus}}, (2{pi}{sup {minus}2}){sup 1}{Delta}, and (2{pi}{sup {minus}2}){sup 1}{Sigma}{sup +} states of the doubly ionized molecule. By a Franck-Condon analysis the potential curves for all these doubly ionized states in the 2{pi}{sup {minus}2} configuration have been determined. The adiabatic double-ionization energies for the (2{pi}{sup {minus}2}){sup 3}{Sigma}{sup {minus}}, (2{pi}{sup {minus}2}){sup 1}{Delta}, and (2{pi}{sup {minus}2}){sup 1}{Sigma}{sup +} states were determined to be 35.68(5), 37.30(9), and 38.45(10) eV, respectively. The potential well is shallower than 1 eV for all these states, and dissociation occurs via a Coulomb-potential mechanism. The double-ionization energies are used to assign a number of lines in the x-ray-excited photoelectron spectrum of HCl.

• OSTI ID: 5355745
• Journal Information: Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:8; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AUGER EFFECT
COLLISIONS
DEUTERIUM COMPOUNDS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONIC STRUCTURE
ENERGY RANGE
ENERGY SPECTRA
FINE STRUCTURE
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONIZATION
ISOTOPE EFFECTS
KEV RANGE
KEV RANGE 01-10
L SHELL
MOLECULE COLLISIONS
SPECTRA