Electron-impact dissociation and transient properties of a stored LiH 2 - beam

L. Lammich; S. Altevogt; H. Buhr; H. Kreckel; S. Krohn; M. Lange; D. Strasser; R. Repnow; M. Grieser; R. Schinke; Z. W. Qu; H. Zhu; D. Schwalm; D. Zajfman; A. Wolf

doi:10.1140/epjd/e2006-00200-6

Electron-impact dissociation and transient properties of a stored LiH ₂ ^- beam

L. Lammich^*, S. Altevogt, H. Buhr, H. Kreckel, S. Krohn, M. Lange, D. Strasser, R. Repnow, M. Grieser, R. Schinke, Z. W. Qu, H. Zhu, D. Schwalm, D. Zajfman, A. Wolf

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The fragmentation of LiH₂ ^- anions after electron impact was investigated at the heavy-ion storage ring TSR. The main reaction channel was found to be electron detachment followed by a breakup into LiH + H. In the first ms after production of the molecular ions in a cesium sputtering ion source, additional contributions were observed in the Li + H₂ and Li^- + H₂ channels, hinting at an initial population of a short-lived state of the anion. To gain a better understanding of the mechanisms underlying the observed behavior of the system, ab initio calculations of relevant potential energy surfaces were performed at selected geometries. The experimental findings are discussed in the light of these calculations.

Original language	English
Pages (from-to)	103-111
Number of pages	9
Journal	European Physical Journal D
Volume	41
Issue number	1
DOIs	https://doi.org/10.1140/epjd/e2006-00200-6
State	Published - Jan 2007
Externally published	Yes

Keywords

34.20.Mq Potential energy surfaces for collisions
34.50.Gb Electronic excitation and ionization of molecules; intermediate molecular states (including lifetimes, state mixing, etc.)
34.80.Ht Dissociation and dissociative attachment by electron impact

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Access to Document

10.1140/epjd/e2006-00200-6

Cite this

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title = "Electron-impact dissociation and transient properties of a stored LiH 2 - beam",

abstract = "The fragmentation of LiH2 - anions after electron impact was investigated at the heavy-ion storage ring TSR. The main reaction channel was found to be electron detachment followed by a breakup into LiH + H. In the first ms after production of the molecular ions in a cesium sputtering ion source, additional contributions were observed in the Li + H2 and Li- + H2 channels, hinting at an initial population of a short-lived state of the anion. To gain a better understanding of the mechanisms underlying the observed behavior of the system, ab initio calculations of relevant potential energy surfaces were performed at selected geometries. The experimental findings are discussed in the light of these calculations.",

keywords = "34.20.Mq Potential energy surfaces for collisions, 34.50.Gb Electronic excitation and ionization of molecules; intermediate molecular states (including lifetimes, state mixing, etc.), 34.80.Ht Dissociation and dissociative attachment by electron impact",

author = "L. Lammich and S. Altevogt and H. Buhr and H. Kreckel and S. Krohn and M. Lange and D. Strasser and R. Repnow and M. Grieser and R. Schinke and Qu, {Z. W.} and H. Zhu and D. Schwalm and D. Zajfman and A. Wolf",

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T1 - Electron-impact dissociation and transient properties of a stored LiH 2 - beam

AU - Lammich, L.

AU - Altevogt, S.

AU - Buhr, H.

AU - Kreckel, H.

AU - Krohn, S.

AU - Lange, M.

AU - Strasser, D.

AU - Repnow, R.

AU - Grieser, M.

AU - Schinke, R.

AU - Qu, Z. W.

AU - Zhu, H.

AU - Schwalm, D.

AU - Zajfman, D.

AU - Wolf, A.

PY - 2007/1

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AB - The fragmentation of LiH2 - anions after electron impact was investigated at the heavy-ion storage ring TSR. The main reaction channel was found to be electron detachment followed by a breakup into LiH + H. In the first ms after production of the molecular ions in a cesium sputtering ion source, additional contributions were observed in the Li + H2 and Li- + H2 channels, hinting at an initial population of a short-lived state of the anion. To gain a better understanding of the mechanisms underlying the observed behavior of the system, ab initio calculations of relevant potential energy surfaces were performed at selected geometries. The experimental findings are discussed in the light of these calculations.

KW - 34.20.Mq Potential energy surfaces for collisions

KW - 34.50.Gb Electronic excitation and ionization of molecules; intermediate molecular states (including lifetimes, state mixing, etc.)

KW - 34.80.Ht Dissociation and dissociative attachment by electron impact

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