Ion kinetic energy spectroscopy of the doubly charged ion of carbon monoxide

1984 ◽  
Vol 80 (3) ◽  
pp. 1150-1161 ◽  
Author(s):  
J. M. Curtis ◽  
R. K. Boyd
Keyword(s):  
Carbon Monoxide ◽  
Kinetic Energy ◽  
Ion Kinetic Energy ◽  
Doubly Charged

scholarly journals A Study of Ion Kinetic Energy Spectrometry of Ferrocene Doubly Charged Ions in Gas Phase

1992 ◽  
Vol 8 (01) ◽  
pp. 117-122
Author(s):  
Fu Bing ◽  
◽  
Lin Chui ◽  
Huang Cheng-Yi ◽  
Liu Shu-Ying
Keyword(s):  
Kinetic Energy ◽  
Gas Phase ◽  
Doubly Charged Ions ◽  
Ion Kinetic Energy ◽  
Doubly Charged ◽  
Charged Ions

Low-Fluence Laser Induced Fragmentation and Desorption of 3,4,9,10-Perylenetetracarboxylic Dianhydride (PTCDA) Thin Film

2013 ◽  
Vol 543 ◽  
pp. 30-34 ◽  
Author(s):  
Aljona Ramonova ◽  
Tengiz Butkhuzi ◽  
Viktorija Abaeva ◽  
I.V. Tvauri ◽  
Soslan Khubezhov ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Kinetic Energy ◽  
Atomic Oxygen ◽  
Laser Light ◽  
Pulsed Laser ◽  
Molecular Fragmentation ◽  
Irradiation Pulse ◽  
Main Effect

Laser-induced fragmentation and desorption of fragments of PTCDA films vacuum-deposited on GaAs (100) substrate has been studied by time-of-flight (TOF) mass spectroscopy. The main effect caused by pulsed laser light irradiation (pulse duration: 10 ns, photon energy: 2.34 eV and laser fluence ranging from 0.5 to 7 mJ/cm2) is PTCDA molecular fragmentation and desorption of the fragments formed, whereas no desorption of intact PTCDA molecule was detected. Fragments formed are perylene core C20H8, its half C10H4, carbon dioxide, carbon monoxide and atomic oxygen. All desorbing fragments have essentially different kinetic energy. The mechanism of photoinduced molecular fragmentation and desorption is discussed.

Ion Kinetic Energy Determinations in Radio-Frequency Glow Discharge Mass Spectrometry

1995 ◽  
Vol 49 (7) ◽  
pp. 917-926 ◽  
Author(s):  
Paula R. Cable ◽  
R. Kenneth Marcus
Keyword(s):  
Kinetic Energy ◽  
Glow Discharge ◽  
Radio Frequency ◽  
Source Region ◽  
Potential Method ◽  
Operating Conditions ◽  
Atmospheric Plasma ◽  
Radio Frequency Glow Discharge ◽  
Ion Trajectory ◽  
Ion Kinetic Energy

Radio-frequency glow discharge (rf-GD) sources produce an abundance of both atoms and ions. For the mass spectrometric application of the glow discharge technique, knowledge of the ion kinetic energies is required to optimize extraction and focusing of ions from the source region into the analyzer. This paper details kinetic energies experimentally determined with the use of the “retarding potential” method. For this study, the analyzer quadrupole of a double-quadrupole mass spectrometer was positively biased to act as a repeller. Ion kinetic energies (IKEs) determined for a variety of discharge and analyzer operating conditions ranged from 12.5 eV to 25.0 eV for 63Cu+. Kinetic energy measurements were confirmed from ion trajectory simulations and follow closely the experimental values for identical analyzer conditions and initial IKEs. Results of this study indicate that the conditions under which ions are formed (plasma conditions) affect IKEs and energy spreads to a greater extent than analyzer parameter variations. Different from atmospheric plasma sources, IKEs for rf-GD species do not vary as a function of ion mass/identity. Evidence is also given in support of a slight mass biasing owing to the transmission properties of double-quadrupole analyzers. The findings detailed herein demonstrate the effects of rf modulation on both ion kinetic energy values and distributions.

Application of mass-analysed ion kinetic energy spectrometry (MIKES) to the determination of the structures of unknown compounds

The Analyst ◽  
1978 ◽  
Vol 103 (1227) ◽  
pp. 613 ◽  
Author(s):  
M. H. Bozorgzadeh ◽  
R. P. Morgan ◽  
J. H. Beynon
Keyword(s):  
Kinetic Energy ◽  
Ion Kinetic Energy

STM studies of island nucleation during hyperthermal atom deposition

2002 ◽  
Vol 749 ◽  
Author(s):  
Joshua M. Pomeroy ◽  
Joel D. Brock
Keyword(s):  
Kinetic Energy ◽  
Ion Beam ◽  
Mean Field ◽  
Scaling Exponent ◽  
Island Nucleation ◽  
Precise Control ◽  
Ion Kinetic Energy ◽  
The Mean ◽  
Sputter Erosion ◽  
Hyperthermal Energy

ABSTRACTWe report fundamental changes in island nucleation dynamics as the kinetic energy of the constituent particles used for film grown is increased. A hyperthermal energy ion beam-line with precise control over ion kinetic energy was used to grow copper islands on a Cu(100) substrate. Dramatic increases in island densities were observed with increasing kinetic energy from thermal energies to 150 eV. We find that sputter erosion and the formation of adatom-vacancy pairs contribute to this increase. In addition, variations in flux and temperature suggest that the mean-field scaling exponent is sensitive to atomistic mechanisms activated by the ion beam.

Sign in / Sign up

Export Citation Format

Share Document