| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2008: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2007: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
|
|---|
| Research Abstract |
Mid-infrared (MIR) absorption spectroscopy has been applied to the detection of the hydroperoxy (HO_2) radical in pulsed laser photolysis combined with a laser absorption kinetics reactor. Conventional detection of the HO_2 radical uses UV absorption in the range 220-230nm, which has strong cross-sections of σ〓10^<-18>cm^2 molecule^<-1>. This absorption band overlaps other species. Thus, the rovibrational absorption line is preferred for the detection of HO_2 in experimental studies of such reaction systems. The transition of the ν3 vibrational band around 1065cm^<-1> was probed with a quantum cascade laser (QCL). The detection limit of the present experimental setup with an absorption path length of 40 cm is estimated to be 4x10^<12>molecules cm^<-3>. MIR absorption detection of the HO_2 radical using a QCL as a spectroscopic light source is a powerful method in spectroscopic and kinetics studies of the HO_2 radical. Cavity ring-down spectroscopy has been also applied to the detection of the alkylperoxy (RO_2) radical in pulsed laser photolysis combined with a laser absorption kinetics reactor.
|
