摘要
The NH(a^1Δ)+CO(X^1Σ+) product channel for the photodissociation of isocyanic acid(HNCO) on the first excited singlet state S1 has been investigated by means of time-sliced ionvelocity map imaging technique at photolysis wavelengths around 201 nm. The CO productwas detected through (2+1) resonance enhanced multiphoton ionization (REMPI). Imageswere obtained for CO products formed in the ground and vibrational excited state (v=0 and v=1). The energy distributions and product angular distributions were obtained from the CO velocity imaging. The correlated NH(a^1Δ) rovibrational state distributions were determined.The vibrational branching ratio of 1NH (v=1/v=0) increases as the rotational state of CO(v=0) increases initially and decreases afterwards, which indicates a special state-tostate correlation between the 1NH and CO products. About half of the available energy was partitioned into the translational degree of freedom. The negative anisotropy parameter indicates that it is a vertical direct dissociation process.
基金
supported by the National Science Foundation of Anhui Province(No.1608085QA19)
the National Science Foundation of China(No.11604052)
the Natural Science Research Project of Education Department of Anhui Province(No.2014KJ020)
the PhD Research Startup Foundation of Fuyang Normal University(No.FSB201501005)
the Quality Engineering Project of Anhui Province(No.2017jyxm0277)
the Open Foundation of State Key Laboratory(Nos.SKLMRD-K201611,SKLMRD-K201711 and SKLMRD-K201810)
