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          Institute: MPI für Kernphysik     Collection: Physics of Quantum Dynamics in Atomic Fragmentation     Display Documents



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ID: 280899.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Direct evidence of a strong isomer effect in electron-impact double ionization of C3H4
Authors:Scully, S. W. J.; Senthil, V.; Wyer, J. A.; Shah, M. B.; Montenegro, E. C.; Kimura, M.; Tawara, H.
Language:English
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Volume:72
Issue / Number:3
Start Page:1
End Page:4
Sequence Number of Article:030701
Copyright:©2005 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:The electron-impact double ionization of two isomers of C3H4 (allene and propyne) between 25 and 1000 eV has been investigated using time-of-flight mass spectrometry. Unambiguous differences in the partial double-ionization spectra of these isomers are observed over the entire energy range. These isomer effects have been observed in C3H4 through the recording of target product channels and, in particular, when hard collisions involving the transfer of a large amount of energy is involved. Measurements of double-ionization events which fragment through Coulomb explosion are also reported. Coincidences between the charged fragment ions and protons were measured and shown to only exhibit isomer effects in the channel involving production of H++CH2+
Classification / Thesaurus:34.80.Gs
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group J. Ullrich/Electron Collisions (A. Dorn)
Identifiers:URL:http://link.aps.org/abstract/PRA/v72/e030701
DOI:10.1103/PhysRevA.72.030701
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