Dissociative attachment from vibrationally and rotationally excited HCl and HF

Journal Article · Sun Feb 01 04:00:00 EST 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.441310· OSTI ID:6683357

Allan, M; Wong, S F

An electron impact mass spectrometer is used to study dissociative attachment in HCl, DCl, and HF at incident energies 0--4 eV. Target molecules in different excited nuclear states are prepared with an iridium oven source. The cross sections for Cl/sup -//HCl, Cl/sup -//DCl, and F/sup -//HF all show an order of magnitude increase with each increase of vibrational quantum (v=0, 1, and 2). In Cl/sup -//HCl the threshold cross section for the v=2 level at 0.1 eV reaches (7.8 +- 4.7) x 10/sup -15/ cm/sup 2/. Together, this large cross section and the recent potential-energy-curve calculations of HCl and HCl/sup -/ show that the conventional theory of dissociative attachment may not be applicable here. A new mechanism for dissociative attachment is suggested.

• Research Organization: Department of Engineering and Applied Science, Mason Laboratory, Yale University, New Haven, Connecticut 06520
• OSTI ID: 6683357
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:3; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
COLLISIONS
CROSS SECTIONS
DISSOCIATION
ELECTRON ATTACHMENT
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ENERGY LEVELS
EXCITED STATES
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MASS SPECTROSCOPY
MOLECULE COLLISIONS
SPECTROSCOPY