Multiphoton ionization mass spectroscopic detection of ammonia clusters
作者： H Shinohara , N Nishi
DOI: 10.1016/0009-2614(82)83178-3
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摘要: Abstract Ammonia cluster ions (NH3)n−2NH+4 (n = 2−8), havevbeen detected by multiphoton ionization (MPI) mass spectroscopy, incorporating both a supersonic nozzle source and an ArB excimer laser. The MPI method reveals that the intensity ratio of NH+4/NH+3 is more than order magnitude greater in electron impact spectrum.
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