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He2 is it possible

  1. Jul 3, 2011 #1
    Could you make a diatomic helium molecule?

    Say you passed ionizing radiation through helium would these ions join to form He2 . I'm not sure wether this would produce an unstable balance of charges in the molecule?
    Last edited: Jul 3, 2011
  2. jcsd
  3. Jul 3, 2011 #2


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    You can make a bound molecule of He2+. You can also make He2*, where * indicates an electronically excited state, but as far as I know you can only make that molecule in condensed phases, or perhaps in the warm part of a JT expansion.

    Neutral He2 exists as a van der Waals molecule in very low temperature molecular beams. It is a very exotic molecule, with an extremely weak bond, and an average interatomic spacing of tens of Angstroms.
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