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Computed energy curves for modelling the dissociation of helium trimer ions

✍ Scribed by E. Buonomo; F.A. Gianturco; F. Schneider; P. De Lara-Castells; G. Delgado-Barrio; S. Miret-Artés; P. Villarreal

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
459 KB
Volume
259
Category
Article
ISSN
0009-2614

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✦ Synopsis

Highly correlated calculations of the collinear, symmetric break-up of helium trimer ions are carried out using an MRD-CI expansion and over a broad range of fragment relative distances. The general features of the lower roots of Xg, ~o, IIg and IIu symmetries are analysed in relation to recent experimental findings and are found to provide an explanation for the observed behaviour of the experimental fragmentation peaks.

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Bimodal kinetic energy release distributions (KERDs) were obtained for the metastable ion reactions: CH~C(OH)=\*Ctl~ -L CHS + \*CH$O+ and CH3CH2C(OH)=CIIz ---I+ 4 C-H; + CH$O+-The biilodality is attributed to incomplete intmmolecular energy redistribution in the short-lived internlediate keto ions,