時間分解フーリエ変換赤外分光法の開発と星間化学研究への応用

抄録

By using a high-resolution spectrometer, a time-resolved Fourier transform infrared spectroscopic method has been developed with the help of a microcontroller SX and/or FPGA, where a maximum of 64 time-resolved data are recorded with a preset time interval in a single scan of the interferometer. This method has been applied to ob-servations of infrared emission spectra from pulsed discharge products such as CN, He₂, H⁺₃, HNC/HCN. He₂ in Rydberg states with higher energy than the b³II state was found to be produced efficiently in afterglow plasma, and the quantum defect theory was applied to identification of each line in electronic states originated from 5f and 6f orbitals. From the observed timeprofiles of emission lines of the H⁺₃ v2 band, the rate constant for recombination reaction of H⁺₃ and electon has been estimated. The time-resolved sytem was also applied for emission lines from laser ablation products by using a high repetition rate Nd: YLF laser.