Improving metastable impact electron spectroscopy and ultraviolet photoelectron spectroscopy signals by means of a modified time-of-flight separation

The sepn. of UPS and metastable impact electron spectroscopy (MIES) is usually performed by a time-of-flight (ToF) sepn. using pre-set ToF for both types of signal. The authors present a new, improved ex situ signal sepn. method for the sepn. of MIES and UPS for every single measurement. Signal sepn. issues due to changes of system parameters can be overcome by changing the ToF sepn. and therefore allowing for the application of a wider range of measuring conditions. The method also enables to identify and achieve sepn. of the 2 signals without any time consuming calibration and the use of any special material for the calibration. Also, changes made to the discharge source are described that enable to operate an existing MIES/UPS source over a broader range of conditions. This allows for tuning of the yield of UV photons and metastable rare gas atoms leading to an improved signal to noise ratio. First results of this improved setup are well in agreement with spectra reported in literature and show increased resoln. and higher signal intensities for both MIE and UP spectra compared to the previous, nonoptimized setup. (c) 2012 American Institute of Physics. [on SciFinder(R)]     «

The sepn. of UPS and metastable impact electron spectroscopy (MIES) is usually performed by a time-of-flight (ToF) sepn. using pre-set ToF for both types of signal. The authors present a new, improved ex situ signal sepn. method for the sepn. of MIES and UPS for every single measurement. Signal sepn. issues due to changes of system parameters can be overcome by changing the ToF sepn. and therefore allowing for the application of a wider range of measuring conditions. The method also enables to i...     »

Metastable state Photoelectron spectrometers Time-of-flight mass spectrometers Time-of-flight mass spectrometry UV photoelectron spectra UV photoelectron spectroscopy (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn.) Fluoropolymers Role: TEM (Technical or engineered material use), USES (Uses) (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn. in app. contg.) Electron emission Electron emission spectroscopy Electron spectrometers (metastable impact improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn.) flight time detector electron spectroscopy UPS metastable impact     «

Metastable state Photoelectron spectrometers Time-of-flight mass spectrometers Time-of-flight mass spectrometry UV photoelectron spectra UV photoelectron spectroscopy (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn.) Fluoropolymers Role: TEM (Technical or engineered material use), USES (Uses) (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn. in app. contg.) Electron emission Ele...     »

CAN 156:189423 Optical, Electron, and Mass Spectroscopy and Other Related Properties 1309-48-4 (Magnesium monoxide); 7439-98-7 (Molybdenum) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn.); 7440-50-8 (Copper) Role: TEM (Technical or engineered material use), USES (Uses) (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn. in app. contg.); 7440-59-7 (Helium) Role: TEM (Technical or engineered material use), USES (Uses) (metastable; improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn. in app. contg.); 9002-84-0 (Teflon) Role: TEM (Technical or engineered material use), USES (Uses) (tube; improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn. in app. contg.)     «

CAN 156:189423 Optical, Electron, and Mass Spectroscopy and Other Related Properties 1309-48-4 (Magnesium monoxide); 7439-98-7 (Molybdenum) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process) (improving metastable impact electron spectroscopy and UPS signals by means of modified time-of-flight sepn.); 7440-50-8 (Copper) Role: TEM (Technical or engineered material use), USES (Uses) (improving metastable impact electron spectroscopy and UPS signals by means of...     »