Open AccessTHE PHOTODISSOCIATION DYNAMICS OF CYANAMIDE AT 193 nm
Author(s) -
Xie Xiao-xiang,
Ian A. McLaren,
Joshua B. Halpern,
William M. Jackson
Publication year - 1987
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.36.691
Subject(s) - photodissociation , materials science , laser , fluorescence , absorption (acoustics) , absorption cross section , population , laser induced fluorescence , atomic physics , photochemistry , analytical chemistry (journal) , cross section (physics) , optics , chemistry , physics , demography , chromatography , quantum mechanics , sociology , composite material
The photodissociation dynamics of cyanamide have been investigated. Laser-induced fluorescence (LIF) was used to study the formation of CN(X2∑+) radical in the photodissociation at. 193 nm. A very weak LIF signal from the CN(X) radical was detected at a laser intensity of 0.35 mJ/pulse and the rotational temperature is 1590±90 K. When the laser intensity is high, the LIF signal increased obviously and the population in the ν"= 2 level was observed. The absorption cross section we measured at 193 nm is less than 2.4±10-19cm2 at a temperature of 50℃. A secondary photolysis mechanism can be used to explain the experimental results.