Formation of negative hydrogen ions in 7-keV OH++Ar and OH ++acetone collisions: A general process for H-bearing molecular species

Zoltán Juhász, Béla Sulik, Jimmy Rangama, Erika Bene, Burcu Sorgunlu-Frankland, François Frémont, Jean Yves Chesnel

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11 Citations (Scopus)


We demonstrate that the formation of negative hydrogen ions (H-) occurs in a wide class of atomic and molecular collisions. In our experiments, H- emission from hydroxyl cations and acetone molecules was observed in keV-energy collisions. We show that hydride (H-) anions are formed via direct collisional fragmentation of molecules, followed by electron grabbing by fast hydrogen fragments. Such general mechanism in hydrogen-containing molecules may significantly influence reaction networks in planetary atmospheres and astrophysical media and new reaction pathways may have to be added in radiolysis studies.

Original languageEnglish
Article number032718
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
Publication statusPublished - Mar 29 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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