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Identification of neutron-deficient isotopes226,227Np

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Zeitschrift für Physik A Atomic Nuclei

Abstract

The neutron-deficient isotopes226Np and227Np were produced in the bombardment of a 380μg/cm2 209Bi target with22Ne projectiles at an incident beam energy of 5.5 MeV/u. They were identified using the α-α time-correlation method /1/.226Np was found to decay with Eα=(8044±20) keV andT 1/2=(31±8) ms. For227Np two α-lines were observed at (7650±20) keV and (7677±20) keV with a half-life of (510±60) ms. The gas-filled separator NASE installed at GSI Darmstadt was used to separate the evaporation residues inflight.

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Authors and Affiliations

  1. GSI Darmstadt, Postfach 110541, D-6100, Darmstadt, Germany

    V. Ninov, F. P. Heßberger, P. Armbruster, S. Hofmann & G. Münzenberg

  2. University of Helsinki, Finland

    M. Leino

  3. University of Osaka, Japan

    Y. Fujita

  4. TH Darmstadt, Germany

    D. Ackermann & W. Morawek

  5. Universität Bonn, Germany

    A. Lüttgen

Authors
  1. V. Ninov
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  2. F. P. Heßberger
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  3. P. Armbruster
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  4. S. Hofmann
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  5. G. Münzenberg
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  6. M. Leino
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  7. Y. Fujita
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  8. D. Ackermann
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  9. W. Morawek
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  10. A. Lüttgen
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Ninov, V., Heßberger, F.P., Armbruster, P. et al. Identification of neutron-deficient isotopes226,227Np. Z. Physik A - Atomic Nuclei 336, 473–474 (1990). https://doi.org/10.1007/BF01294121

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  • DOI: https://doi.org/10.1007/BF01294121

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