Laser induced gas-surface reaction of Cl 2 supersonic molecular beam with a nickel surface

Abstract

The supersonic molecular beam technique is used to study the dynamics of laser-induced reaction of Cl 2 with a Ni surface irradiated by 355 nm and 1064 nm laser photons. The mass and velocity distribution of reaction products are measured by time-resolved mass spectrometry. Results show that the genuine products generated by the irradiation at 355 nm are NiCl and NiCl 2, while only NiCl 2 is identified at 1064 nm. The reaction yield can be enhanced by increasing the translational energy of incident Cl 2 molecules and the laser fluence. The possible mechanisms for the laser-induced Cl 2Ni surface reaction at different laser wavelengths are discussed.