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Muon capture rates in233U,234U,235U,236U,238U, and237Np

  • Nuclear Structure and Reactions
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

The time spectra for muon induced fission of233U,234U,235U,236U,238U, and237Np were measured simultaneously, detecting both fragments in coincidence in a fast multi parallel plate avalanche detector. The observed mean lifetimes τ are 68.9 ± 0.3 ns, 70.6 ± 0.2 ns, 72.2 ±0.2 ns, 74.3 ± 0.3 ns, 77.0 ±0.4 ns, and 69.8 ±0.2 ns for the above isotopes, respectively. No second time component, tentatively ascribed to a possible fission isomer, was observed. The deduced total capture rates are compared with theoretical predictions.

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Author notes

  1. C. T. A. M. de Laat

    Present address: Physics Department, University of Utrecht, 3584, CC Utrecht, The Netherlands

  2. A. K. Sinha

    Present address: Nuclear Science Centre, J.N.U. Old Campus, Post Box 10502, 110067, New Delhi, India

Authors and Affiliations

  1. ISKP, Universität Bonn, Federal Republic of Germany

    H. Hänscheid, P. David, T. Mayer-Kuckuk, F. Risse, Ch. Rösel, W. Schrieder & A. K. Sinha

  2. NIKHEF-K, Amsterdam, The Netherlands

    J. Konijn, C. T. A. M. de Laat & A. Taal

  3. University of Warsaw, Bialystok, Poland

    T. Krogulski

  4. PSI, Villigen, Switzerland

    C. Petitjean & H. W. Reist

  5. GSI, Darmstadt, Federal Republic of Germany

    S. M. Polikanov

  6. Université de Fribourg, Switzerland

    L. A. Schaller & L. Schellenberg

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  1. H. Hänscheid
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Additional information

It is a pleasure to thank Prof. J.P. Blaser and his staff for their encouraging support and for the excellent working conditions at PSI. We thank Dr. J. Missimer and Dr. R. Rosenfelder for carefully discussing the manuscript. We are indepted to the following institutes or organizations for financial support: Bundesministerium für Forschung und Technologie der Bundesrepublik Deutschland contract number 06BN271 (PD, HH, TM-K, FR, CR, WS), Alexander von Humboldt Foundation (AKS), Foundation for Fundamental Research on Matter and the Netherlands Organization for the Advancement of Pure Research (JK, CTAMdL, AT), the University of Warsaw, Bialystok (TK), and the Schweizer Nationalfonds (LAS, LS).

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Hänscheid, H., David, P., Konijn, J. et al. Muon capture rates in233U,234U,235U,236U,238U, and237Np. Z. Physik A - Atomic Nuclei 335, 1–8 (1990). https://doi.org/10.1007/BF01289340

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