Abstract

The multiple photoionization of CH4 and NH3 molecules was investigated using monochromated synchrotron radiation and applying time-of-flight mass spectrometry in a multi-coincidence mode. Ion mass spectra were recorded in the photon energy range of 200 to 600 eV, including the C 1s and N 1s edges. Three electron-ion coincidence techniques (PEPICO, PE2PICO, and PE3PICO) were used to in order understand the fragmentation mechanisms of highly excited molecular ions produced following the absorption of a X-Ray photon.

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