Multi-electron-capture processes by C4+ from CH4, C2H6, C3H8 and n-C4H10 in the energy range 0.7–400 eV u−1

✍ Scribed by K. Soejima; K. Okuno; Y. Kaneko

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 360 KB
• Volume: 28
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210280414

✦ Synopsis

Charge-changing cross-sections u43, u42 and u4, of C4+ injected into CH, , C2H,, C,H, and n-C4H,, were measured in the energy range 0.7-400 eV u-'. 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 u41 is very close to 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 multielectron-capture processes become dominant in lowenergy collisions with hydrocarbon molecules.