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Studies Of Metastably Excited Helium Clusters

Author

Listed:
  • T. JIANG

    (Physics Department, University of Rhode Island, Kingston, RI 02881, USA)

  • C. KIM

    (Physics Department, University of Rhode Island, Kingston, RI 02881, USA)

  • J.A. NORTHBY

    (Physics Department, University of Rhode Island, Kingston, RI 02881, USA)

Abstract

Helium clusters containing long-lived metastably excited helium molecules are produced by electron impact and formed into a beam. The delayed release of excited molecules from clusters after a long flight path is measured. The release rate can be enhanced by an intersecting monochromatic infrared light beam. The frequency dependence of the light-induced signal allows us to identify the excitation as the ground-state triplet helium${\rm He}_2^*$molecule$\left(a^3 \sum_u^+\right)$. The rotational structure of thea→btransition is noticeably different from the same line in bulk helium, and may provide information about the nature of the cluster in the future.

Suggested Citation

  • T. Jiang & C. Kim & J.A. Northby, 1996. "Studies Of Metastably Excited Helium Clusters," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 377-381.
    • Handle: RePEc:wsi:srlxxx:v:03:y:1996:i:01:n:s0218625x96000681
    DOI: 10.1142/S0218625X96000681
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