The rotational state populations of HCI ( u" = 0, 1, and 2) and the tine structure population of Cl( 'P,) produced in the UV photodissociation of vinyl chloride were measured in a molecular beam pump-and-probe experiment. Boltzmann-like distributions were observed for the rotational populations in v
Product state distributions of CN(X) produced in the photodissociation of C4N2 at 160 nm
β Scribed by M.J. Sabety-Dzvonik; R.J. Cody; W.M. Jackson
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 263 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The photolysis of dicyanoacetylenc (CaiUz) at 160 run produces CN(X * 23 mdlcals which arc rotationauy and vibra tionally cxcitcd. Laser-induced fh~orcscence of the CN(X) shows that the radicak are forrned primarily in the IJ = 0 dnd u = 1 vlbrationai levels with a relatlvc population ratio of No: NI : N2 = 0.76: 0.17 : 0.07. The rotational Iinc intensities ate tittcd by IIoltzmann distributions with temperatures of = 1400 K and = 12CO K for the u = 0 and u = 1 Icvck. recpccriveIy. The form of these rotational distributions arc qualitatively explained by a statistical prcdissociation of C4N2.
π SIMILAR VOLUMES
Laser photolysis of dicyanoacetylene at 193 nm and at 248 nm, leading to the production of CN, C, and (probably) &N, has been investigated. CN violet bands and Cz Swan bands were observed in absorption. Photolysis at 193 nm produces CN in both the X %+ and in the A 'II, manifolds, the latter -probab
The photodissociation of vinyl fluoride following electronic excitation at 157 nm has been studied using the techniques of mass-resolved photofragment time-of-flight spectroscopy. HF elimination has been observed as the main primary dissociation process. This channel has a translational energy distr
The photodissociation spectrum of N: from 270 to 310 nm is broad and structureless at 300 K, with the cross section diminishing by a factor of 10 towards shorter wavelengths. We have detected fluorescence from N:(g) excited state fragments having quantum yield < 0.01 and risetime < 10 ns. The thresh