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Metastable fragmentation of Ne+4 cluster ion initiated by excimer decay

✍ Scribed by M. Foltin; T.D. Märk

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
347 KB
Volume
180
Category
Article
ISSN
0009-2614

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✦ Synopsis

A new metastable decay reaction of the Ne: cluster ion produced by electron-impact ionization has been studied with a doublefocusing sector tield mass spectrometer. Appearance energy measurements ofthis decay reaction Ne$ +Ne: + 2Ne provide quantitative support in favour of the suggested decay model, i.e. the radiative decay of an excimer dimer embedded in the ram-gas cluster ion is the origin of this new, unusual metastable fragmentation channel leading to delayed ejection of more than one monomer. Moreover, the dependence of the metastable fraction on the time interval between ionization and fragmentation obtained supports this model qualitatively.

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✍ D. Margreiter; G. Walder; Z. Herman; T.D. Märk 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 511 KB

The stability of ( 02); ions produced by electron attachment to a neutral cluster beam has been studied with a double-focusing sector field mass spectrometer. Besides monomer evaporation via metastable dissociation reactions (Oz);\*-(Oi);?, t O2 it was possible to observe for the fint time metastabl