화학공학소재연구정보센터
Applied Surface Science, Vol.197, 246-250, 2002
Emission spectra of the species ablated from a solid target submerged in liquid: vibrational temperature of C-2 molecules in water-confined geometry
Emission spectra of C-2 molecules produced at the water(-)raphite interface by pulsed laser irradiation were obtained at various delay times from the irradiation. Vibrational temperature was determined by the Boltzmann plot based on the vibrational bands in Deltav = -1 branch of the Swan system. The results show that it was ca. 5000 K and did not change significantly with the delay time. With increasing the delay time up to ca. 500 ns the signal from the Swan band disappeared before the decrease of the vibrational temperature. The results were explained by the formation of a gas cavity and its collapse at several hundreds of nanoseconds from the laser pulse. (C) 2002 Elsevier Science B.V All rights reserved.