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Photodetachment of Metastable Helium Molecules from the Surface of Helium Nanodroplets

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Abstract

Metastable triplet helium molecules, created in helium nanodroplets by electron bombardment, become trapped in surface states. Photo induced electronic transitions of a molecule result in its detachment from the cluster. It is subsequently detected when it emits a secondary electron upon reaching a nearby surface. We have found that there are two different characteristic energies with which the molecules are emitted, one thermal and one much larger. We have also found that the spectral lines are asymmetric, but the peaks are only slightly blue shifted from their values in the free molecule.

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  1. C. Kim

    Present address: Physics Department, Brown University, Providence, RI, 02912, USA

Authors and Affiliations

  1. Physics Department, University of Rhode Island, Kingston, R.I, 02881, USA.

    C. Kim, S. Yurgenson, C.-C. Hu & J. A. Northby

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  1. C. Kim
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  2. S. Yurgenson
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  3. C.-C. Hu
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  4. J. A. Northby
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Kim, C., Yurgenson, S., Hu, CC. et al. Photodetachment of Metastable Helium Molecules from the Surface of Helium Nanodroplets. Journal of Low Temperature Physics 113, 1097–1102 (1998). https://doi.org/10.1023/A:1022581123318

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  • DOI: https://doi.org/10.1023/A:1022581123318

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