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Isotopic Anomalies In A Uranium Cluster Formed By Lais

Author

Listed:
  • J. VAN DE WALLE

    (Laboratoire de Physique des Solides, Université Paris–Sud, 91405 Orsay, France)

  • R. J. TARENTO

    (Laboratoire de Physique des Solides, Université Paris–Sud, 91405 Orsay, France)

  • P. JOYES

    (Laboratoire de Physique des Solides, Université Paris–Sud, 91405 Orsay, France)

Abstract

A study of a Au–U liquid alloy ion source (LAIS) where uranium is enriched in its lighter element (20%235U, 80%238U) has been performed by high resolution mass spectrometry. Monoatomic species Au+, Au2+, U2+, U3+and polyatomic species${\rm Au}^+_n$,${\rm U}^{p+}_n$,AunU+are observed. The monoatomic results are well explained by the Kingham postionization process.${\rm Au}^+_n$andAunU+species present an interesting odd–even effect characteristic of monovalent elements. The main result of this preliminary letter is a heteroisotope anomaly which appears in${\rm U}^+_2$,${\rm U}^+_3$and${\rm U}^{4+}_3$emission where only homoisotopes are detected. A similar phenomenon was reported for${\rm Cu}^+_2$and${\rm Ge}^+_2$in a previous work and was attributed to a higher state of excitation of emitted heteroisotope aggregates which explode as they fly to the collector.1,2

Suggested Citation

  • J. Van De Walle & R. J. Tarento & P. Joyes, 1999. "Isotopic Anomalies In A Uranium Cluster Formed By Lais," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 6(03n04), pages 307-312.
    • Handle: RePEc:wsi:srlxxx:v:06:y:1999:i:03n04:n:s0218625x99000299
    DOI: 10.1142/S0218625X99000299
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