Elastic scattering phenomena in mass analyzers with tandem fields

1970 ◽  
Vol 48 (14) ◽  
pp. 1735-1742 ◽  
Author(s):  
D. Ioanoviciu
Keyword(s):  
Elastic Scattering ◽  
Mass Spectrometer ◽  
Current Distribution ◽  
Mass Spectra ◽  
Ion Beam ◽  
Field Mass ◽  
Beam Path ◽  
Double Focusing

The elastic scattering in the tandem field mass analyzing systems is considered. The analysis includes deflecting electrostatic and magnetic converging, dispersing, diverging fields, and also the fields of quadrupoles. The influence of slits located on the ion beam path is indicated. An example illustrates the effect of slits on the elastically scattered current distribution in a double focusing mass spectrometer. Another example gives an idea about the influence of the diverging field on the peak tails in mass spectra.

The Decomposition of Benzene and Deuterated Benzenes under Electron Impact

1967 ◽  
Vol 22 (4) ◽  
pp. 454-459 ◽  
Author(s):  
K. R. Jennings
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Mass Spectra ◽  
Charged Species ◽  
Decomposition Reactions ◽  
Fragment Ions ◽  
Double Focusing ◽  
Doubly Charged

Metastable transitions have been observed in the mass spectra of benzene, hexadeutero-benzene, 1,4-dideuterobenzene and 1,3,5-trideuterobenzene using a double-focusing mass spectrometer. Decomposition maps have been obtained for each substance and decomposition reactions leading to the production of all significant fragment ions have been suggested. Metastable transitions of several doubly-charged species were found. Loss if identity by the H and D atoms of the partly-deuterated benzenes was observed in metastable transitions in their mass spectra, indicating that rapid isomerization occurs before fragmentation.

Electron impact studies. LVI. The fluorenyl and phenalenyl cations. The application of metastable characteristics

1970 ◽  
Vol 23 (7) ◽  
pp. 1431 ◽  
Author(s):  
JH Bowie ◽  
TK Bradshaw
Keyword(s):  
Electron Impact ◽  
Mass Spectrometer ◽  
Mass Spectra ◽  
Impact Studies ◽  
Double Focusing

A study of the abundances of certain metastable peaks formed by the de- composition of ions in the first and second field-free regions of a double-focusing mass spectrometer has shown that the M-1 ions (m/e 165) in the mass spectra of fluorene and phenalene have different structures. Correlations based on these structures have been obtained for C13H9+ species formed from different systems.

A novel double-focusing time-of-flight mass spectrometer for absolute recoil ion cross sections measurements

2016 ◽  
Vol 87 (8) ◽  
pp. 083112 ◽  
Author(s):  
L. Sigaud ◽  
V. L. B. de Jesus ◽  
Natalia Ferreira ◽  
E. C. Montenegro
Keyword(s):  
Mass Spectrometer ◽  
Cross Sections ◽  
Time Of Flight ◽  
Flight Mass Spectrometer ◽  
Double Focusing
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