Negative ion states of sulfur hexafluoride

Journal Article · Fri Apr 15 04:00:00 EDT 1988 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.454710· OSTI ID:5437731

Chen, E C.M.; Shuie, L; Desai D'sa, E; Batten, C F; Wentworth, W E

The reaction of SF/sub 6/ with thermal electrons has been studied in a Ni-63 atmospheric pressure ionization source for a quadrupole mass spectrometer (API/MS). The major ions that are observed are the parent negative ion (SF/sup -//sub 6/) and the parent minus a fluorine atom (SF/sup -//sub 5/). The ratio of (SF/sup -//sub 5/)/(SF/sup -//sub 6/) is highly temperature dependent above 500 K. The dissociation energy of the ground state negative ion into SF/sup -//sub 5/ and F has been determined to be 1.35 +- 0.1 eV. This gives values of 3.8 +- 0.15 eV for the electron affinity of SF/sub 5/ and 1.15 +- 0.15 eV for the electron affinity of SF/sub 6/. The negative ion states of sulfur hexafluoride have been described by ''pseudo-two-dimensional'' Morse potentials calculated using experimental data.

• Research Organization: School of Science and Applied Science, University of Houston, Clear Lake, Houston, Texas 77058
• OSTI ID: 5437731
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 88:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
CHARGED PARTICLES
COLLISIONS
ELECTRON ATTACHMENT
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IONS
MOLECULE COLLISIONS
MORSE POTENTIAL
POTENTIALS
SULFUR COMPOUNDS
SULFUR FLUORIDES