Method for recording ion-cyclotron-resonance mass spectra and mass spectrometer designed for carrying out the method
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Two-dimensional Fourier transform (2D FT) spectroscopy was applied to ion-cyclotron resonance (ICR) to obtain direct evidence for mass transfer due to ion-mol. collisions. The 2D FT ICR expt., which is closely analogous to 2D exchange NMR spectroscopy (NOE ...
Predissocn. spectra were detd. for SF6-Ar clusters in a mol. beam by monitoring the decrease in a specific mass spectrometer signals induced by a tunable continuous-wave CO2 laser. A red shift occurs downstream from the nozzle as the gas expands and the cl ...
The time-resolved fluxes of negative polysilicon hydride ions from a power-modulated rf silane plasma have been measured by quadrupole mass spectrometry and modeled using a simple polymerization scheme. Experiments were performed with plasma parameters sui ...
New low-energy electron injection systems based on indirectly heated dispenser cathodes facilitate electron capture dissocn. (ECD) in Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. In this joint report, details are presented of the de ...
Two-dimensional (2D) Fourier transform ion cyclotron resonance (2D FT-ICR) allows one to obtain direct evidence for the occurrence of ion-mol. reactions. In 2D FT-ICR spectra, one observes resonances with 2 distinct frequency coordinates w1 and w2 that cor ...
Negative ions have been clearly identified in silane rf plasmas used for the deposition of amorphous silicon. Mass spectra were measured for monosilicon up to pentasilicon negative ion radical groups in power-modulated plasmas by means of a mass spectromet ...