Department of Chemistry

Amy Instrumentation Facility Projects

Negative Ion PhotoElectron Spectrometer (NIPES)


This instrument, constructed for the Wenthold group, has no commercially available equivalent.  NIPES combines a pulsed ion source, a time-of-flight mass spectrometer, a frequency-multiplied YAG laser, and a time-of-flight electron energy analyzer.  In operation, ions are generated in the source and separated in the mass spectrometer; a chosen mass packet is irradiated with a laser pulse to detach electrons that are energy analyzed.  The difference between the photon energy and the kinetic energy of the electron yields the electron affinity of the ion.  Most of the electronics and hardware in the system were custom fabricated by the Amy Facility.

NIPES Publications

Wijeratne, N. R., M. Da Fonte, et al. (2009). "Photoelectron Spectroscopy of Chloro-Substituted Phenylnitrene Anions." J. Phys. Chem. A 113(34): 9467-9473.

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