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Multi‐electron‐capture processes by C 4+ from CH 4 , C 2 H 6 , C 3 H 8 and n ‐C 4 H 10 in the energy range 0.7–400 eV u −1
Author(s) -
Soejima K.,
Okuno K.,
Kaneko Y.
Publication year - 1993
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210280414
Subject(s) - range (aeronautics) , atomic physics , ion , electron , argon , mass spectrometry , electron capture , hydrocarbon , chemistry , tandem , energy (signal processing) , ion source , tandem accelerator , ion beam , nuclear physics , physics , materials science , organic chemistry , chromatography , quantum mechanics , composite material
Charge‐changing cross‐sections σ 43 , σ 42 and σ 41 of C 4+ injected into CH 4 , C 2 H 6 , C 3 H 8 and n ‐C 4 H 10 were measured in the energy range 0.7–400 eV u −1 . A tandem mass spectrometer system with an ion source of the EBIS type (Mini‐EBIS) and a collision cell consisting of an octupole ion beam guide was used. It is a significant feature that both the magnitude and energy dependence of the cross‐sections obtained showed very little target dependence for all the hydrocarbon targets studied. Another feature is that σ 41 is very close to σ 42 , and they become flat at low energy, in contrast to the case with an argon target which was studied as a reference. This implies that multi‐electron‐capture processes become dominant in low‐energy collisions with hydrocarbon molecules.