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An experimental and theoretical study of the negatively charged helium dimer, He2−

✍ Scribed by Vidhya Krishnamurthy; D. Mathur

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
346 KB
Volume
167
Category
Article
ISSN
0009-2614

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✦ Synopsis

Translational

energy spectrometry measurements have been made on Hei ions resulting from 3 keV double-electron capture collisions between He: and Ns. The endoergic energy defect for this reaction is measured to be 43 eV. Potential energy curves have been computed for He: (X Ix+), HeF(Z*)

and He$(Z+) in order to elucidate the negative ion formation mechanism. The vertical electron affinity for Hel' is determined to be +0.15 eV, and a lower limit on its lifetime is measured to be 1.6 us.

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