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First evidence for the two-proton decay of 45Fe

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Abstract:

Decays of five 45Fe atoms have been observed at the fragment separator of GSI. Whereas one event is consistent with the β-decay of 45Fe accompanied by the emission of a 10 MeV proton, four decays are consistent with the emission of particle(s) of total energy 1.1±0.1 MeV. This observation represents the first evidence for two-proton ground-state radioactivity, a decay mode predicted for 45Fe. The time distribution of the observed decay events corresponds to a half-life of 3.2+2.6 -1.0 ms.

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Authors and Affiliations

  1. Institute of Experimental Physics, Warsaw University, PL-00-681 Warszawa, Poland, , , , , , PL

    M. Pfützner, R. Grzywacz, Z. Janas & J. Kurcewicz

  2. GSI, Planckstrasse 1, D-64291 Darmstadt, Germany, , , , , , DE

    E. Badura, H. Geissel, L.V. Grigorenko, M. Hellström, C. Mazzocchi, I. Mukha, G. Münzenberg, C. Plettner, E. Roeckl & R.S. Simon

  3. Department of Physics and Astronomy, University of Tennessee, Knoxville 37996 TN, USA, , , , , , US

    C. Bingham

  4. CEN Bordeaux-Gradignan, F-33175 Gradignan Cedex, France, , , , , , FR

    B. Blank, J. Giovinazzo, A.S. Lalleman & J.-C. Thomas

  5. Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, L69 3BX, UK, , , , , , GB

    M. Chartier

  6. Physics Division, ORNL, Oak Ridge, TN 37831-6371, USA, , , , , , US

    K.P. Rykaczewski

  7. Department of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, UK, , , , , , GB

    K. Schmidt

  8. GANIL, BP 5027, F-14021 Caen Cedex, France, , , , , , FR

    M. Stanoiu

Authors
  1. M. Pfützner
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  2. E. Badura
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  3. C. Bingham
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  4. B. Blank
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  5. M. Chartier
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  6. H. Geissel
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  7. J. Giovinazzo
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  8. L.V. Grigorenko
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  9. R. Grzywacz
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  10. M. Hellström
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  11. Z. Janas
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  12. J. Kurcewicz
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  13. A.S. Lalleman
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  14. C. Mazzocchi
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  15. I. Mukha
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  16. G. Münzenberg
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  17. C. Plettner
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  18. E. Roeckl
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  19. K.P. Rykaczewski
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  20. K. Schmidt
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  21. R.S. Simon
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  22. M. Stanoiu
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  23. J.-C. Thomas
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Additional information

Received: 17 May 2002 / Accepted: 28 May 2002

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Pfützner, M., Badura, E., Bingham, C. et al. First evidence for the two-proton decay of 45Fe. Eur Phys J A 14, 279–285 (2002). https://doi.org/10.1140/epja/i2002-10033-9

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  • DOI: https://doi.org/10.1140/epja/i2002-10033-9

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