TY - JOUR
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
Y1 - 2007/1
N2 - 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.
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
UR - http://www.scopus.com/inward/record.url?scp=33845890262&partnerID=8YFLogxK
U2 - 10.1140/epjd/e2006-00200-6
DO - 10.1140/epjd/e2006-00200-6
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AN - SCOPUS:33845890262
SN - 1434-6060
VL - 41
SP - 103
EP - 111
JO - European Physical Journal D
JF - European Physical Journal D
IS - 1
ER -