کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5372921 | 1504189 | 2016 | 8 صفحه PDF | دانلود رایگان |
We report the detection of the ethynyl (C2H) radical by (1 + 2) REMPI on the BÌ2Aâ²(T,Ka=0,1,2)âXÌ2Σ+(0,31,0) transition. One parallel, BÌ2Aâ²(T,Ka=1)âXÌ2Σ+(0,31,0) with EeV=37,946cm-1, and two perpendicular transitions, BÌ2Aâ²(T,Ka=0)âXÌ2Σ+(0,31,0) with EeV=37,927cm-1 and BÌ2Aâ²(T,Ka=2)âXÌ2Σ+(0,31,0) with EeV=38,002cm-1, are observed. The C2H radical was generated by the photodissociation of C2H2 at 193 nm. By employing REMPI spectroscopy, we also studied the collisional induced rotational relaxation of C2H and measured rotational relaxation rate constants for this radical. The measured rotational relaxation rate constants for several values of Jâ³ are (0.08-0.26)Ã10-9cm3molec-1s-1 and (0.75-1.92)Ã10-9cm3molec-1s-1 for nitrogen buffer gas and acetylene, respectively.
Journal: Chemical Physics - Volume 479, 10 November 2016, Pages 91-98