Time-resolved fluorescence investigation of the collisional quenching of Mg(3 sup 3 P sub J ) at elevated temperatures with halogenated methanes following pulsed dye laser excitation

Journal Article · Thu Apr 19 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100371a018· OSTI ID:6835633

Beitia, F; Castano, F ^[1]; Husain, D ^[2]

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1. Universidad del pais Vasco, Bilbao (Spain)
2. Univ. of Cambridge (England)

The authors present a kinetic study of the collisional behavior of electronically excited magnesium atoms, Mg(3s3p({sup 3}P{sub J})), 2.712 eV above the 3s{sup 2}({sup 1}s{sub 0}) ground state, with the halogenated methanes CF{sub 4}, CF{sub 3}H, CF{sub 2}H{sub 2}, CH{sub 3}F, CH{sub 3}Cl, and CH{sub 3}Br at elevated temperatures. The collisional quenching of Mg(3{sup 3}P{sub J}) by CF{sub 4} and CF{sub 3}H was studied over the temperature ranges of 680-905 and 710-905 K, respectively, and demonstrated significant temperature dependences expressed by the Arrhenius forms k{sub CF{sub 4}} = (4.3{sup +1.7}{sub {minus}1.3}) {times} 10{sup {minus}11} exp({minus}49.7 {plus minus} 2.1 kJ mol{sup {minus}1}/RT) and k{sub CF{sub 3}H} = (2.9{sup +0.9}{sub {minus}0.8}) {times} 10{sup {minus}10} exp({minus}36.4 {plus minus} 2.1 kJ mol{sup {minus}1}/RT) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}.

• OSTI ID: 6835633
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:8; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400200* -- Inorganic
Organic
& Physical Chemistry
ALKALINE EARTH METALS
ALKANES
CHEMICAL REACTION KINETICS
DATA
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
KINETICS
LASER RADIATION
MAGNESIUM
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
METHANE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
RADIATIONS
REACTION KINETICS
SPECTROSCOPY