摘要
The multiphoton ionization (MPI) of diethylamine is first reported in this paper. Atime-of-flight mass spectrometer was used in the experiment under collision-free condition. MPImass spectra were measured in the region of 464 ～486 nm using a dye laser and at double fre-quency of a Nd:YAG laser. Molecular ion was created through resonance enhanced multiphotonionization (REMPI) via Rydberg states. Fragment, ion distribution was formed through “lladderswitching” process. The experimentai demonstration of the process is reported for the first timeby the discussion of dependence of ion relative, abundance on laser wavelength and energy. Thecompetition bet,ween further up-pumping and fragmentation of Parent ion also exists, and higherlaser intensity favors the former.
The multiphoton ionization (MPI) of diethylamine is first reported in this paper. Atime-of-flight mass spectrometer was used in the experiment under collision-free condition. MPImass spectra were measured in the region of 464 ～486 nm using a dye laser and at double fre-quency of a Nd:YAG laser. Molecular ion was created through resonance enhanced multiphotonionization (REMPI) via Rydberg states. Fragment, ion distribution was formed through “lladderswitching” process. The experimentai demonstration of the process is reported for the first timeby the discussion of dependence of ion relative, abundance on laser wavelength and energy. Thecompetition bet,ween further up-pumping and fragmentation of Parent ion also exists, and higherlaser intensity favors the former.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1998年第3期270-274,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
