The production of I('P,,\*) m the photolysls of CHzIz has been studled optoncoustlally at cvcilahon wrvelcngths hctwccn 365 5 and 247.5 nm Bands found at 32200 and 47000 cm-' corrchtc with I(\*Ps,~) whilst those at 34700 md 40100 cm-', which correhtc with I(2P1p), give fml 2P3p/2P1p ratios of 1.75 a
Tunable laser photodissociation: quantum yield of I★(2P12) from Ch2I2
✍ Scribed by J.Brooke Koffend; Stephen R. Leone
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 566 KB
- Volume
- 81
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Tunable laser I*(zPI/2) quantum-yield measurements are presented for CH 2 I 2 in the wavelen,$h range 248-340 nm. The results suggest that a curve-crossing mechanism is operative in the dissociation_
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The quantum yields for production of I(2P3,2) and I\*('P& at 248 nm are reported for a variety of alkyl and substituted-alkyl iodides using the technique of two-photon atomic laser-induced fluorescence. These results are combined with those of others to provide quantum yields over a wide range of ra
Excited iodine atoms :(\*PI/~) are formed by laser irradiation of C2FS I at 2950 A. The mczm radiative lifetime T of these metastsble atoms and their bimolecular rate constant k2 for deactivation in collisions with C2 F5 I were measured to be: T = 108 +-10 ms; k2 = (1.8 i 0.1) X 10-l' cm3/molec s. \
The angle-velocity distribution of I(2P3/2) and I(2131/2) from photodissociation of (CH3I) n clusters was measured at 266 and 304 nm. For the monomer (n = 1), the angular distribution is very anisotropic and the translational energy spectrum is sharply peaked at high energy. For clusters (predominan
Laser photolysis of chlorine-containing molecules at 1= 248 and 3 5 I nm has been performed using time-resolved laser magnetic resonance to detect Cl(2P,,2) and Cl(2P312) chlorine atoms. Relative yields of spin-orbit excited chlorine atoms, /J'= ~~~~z~,,,~l/~I~~~2~,,,~l+~~~~z~,,~~lJ, h ave been meas