Matrix isolation electron spin resonance studies of sup 28,28 Si sub 2 sup + , sup 28,29 Si sub 2 sup + , sup 29,29 Si sub 2 sup + , Ge sub 2 sup + , and sup 73 Ge sub 2 sup + produced by pulsed laser vaporization. Comparison with theoretical calculations

Journal Article · Wed Apr 03 23:00:00 EST 1991 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100160a022· OSTI ID:5524683

Knight, Jr, L B; Herlong, J O; Babb, R; Earl, E; Hill, D W; Arrington, C A ^[1]

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1. Furman Univ., Greenville, SC (United States)

The Si{sub 2}{sup +} and Ge{sub 2}{sup +} cation radicals were generated by pulsed laser vaporization and isolated in rare-gas matrices at 4 K for electron spin resonance (ESR) investigations. The electronic ground states were established as X{sup 4}{Sigma} for both cations with the three unpaired electrons occupying predominantly valence p-type orbitals. In the case of {sup 29}Si{sub 2}{sup +}, the observed nuclear hyperfine interaction (A tensor) was compared with that computed in an ab initio configuration interaction type calculation. The dependence of the hyperfine parameters on internuclear distance was also investigated. For comparison purposes, all diatomic and triatomic cations studied in the gas phase and in rare-gas matrices at sufficiently high resolution to observe nuclear hyperfine interaction are listed. For {sup 29}Si{sub 2}{sup +} in neon, g{sub {perpendicular}} = 1.993 (1), {vert bar}A{sub {perpendicular}}{vert bar} = 52.4 (5) MHz, and D = 27.6 (8) GHz; for {sup 73}Ge{sub 2}{sup +}, g{sub {perpendicular}} = 1.939 (1) and {vert bar}A{sub {perpendicular}}{vert bar} = 10 (3) MHz.

• OSTI ID: 5524683
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 95:7; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
COMPUTER CALCULATIONS
DATA
ELECTROMAGNETIC RADIATION
ELECTRON SPIN RESONANCE
ELECTRONIC STRUCTURE
ENERGY LEVELS
EVAPORATION
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
GERMANIUM 73
GERMANIUM IONS
GERMANIUM ISOTOPES
GROUND STATES
HYPERFINE STRUCTURE
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
ISOTOPIC EXCHANGE
LASER RADIATION
LIGHT NUCLEI
MAGNETIC RESONANCE
MATRIX ISOLATION
MILLISEC LIVING RADIOISOTOPES
MOLECULAR STRUCTURE
NUCLEI
NUMERICAL DATA
PHASE TRANSFORMATIONS
RADIATIONS
RADICALS
RADIOISOTOPES
RESONANCE
SAMPLE PREPARATION
SECONDS LIVING RADIOISOTOPES
SILICON 28
SILICON 29
SILICON IONS
SILICON ISOTOPES
STABLE ISOTOPES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THEORETICAL DATA