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The search for 7H

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Abstract.

This work focuses on the experimental search and characterisation of the super-heavy 7H, using a one-proton transfer reaction 12C(8He,7H)13N. A 8He primary beam at 15.4 A MeV was delivered by the GANIL-SPIRAL facility and impinged on a gaseous carbon target, the active target MAYA, where 7H was produced and detected. 7H was observed as a resonance 0.57+0.42-0.21 MeV above the 3H+4n subsystem mass, with an associated width of 0.09+0.94-0.06 MeV. The differential cross-section of 7H production for the 12C(8He,7H)13N reaction yields 40.1+58.0-30.6 μb/sr. This experiment demonstrates the advantage of using the active target technique particularly well suited for the detection of low energy residues.

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Authors and Affiliations

  1. Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain

    M. Caamaño & D. Cortina-Gil

  2. GANIL, Bd Henri Becquerel, BP. 55027, 14076, Caen Cedex 05, France

    W. Mittig, H. Savajols, C. E. Demonchy, B. Jurado, F. Rejmund, M. Rejmund & P. Roussel-Chomaz

  3. University of Liverpool, Liverpool, L69 7ZE, UK

    M. Chartier, B. Fernández & M. B. Gómez-Hornillos

  4. CEA/DSM/DAPNIA, CEA Saclay, 91191, Gif-sur-Yvette Cedex, France

    A. Gillibert & A. Obertelli

  5. Institute of Nuclear Chemistry, University of Mainz, 55128, Mainz, Germany

    O. Kiselev

  6. CCLRC Daresbury Laboratory, Daresbury Warrington Cheshire, WA4 4AD, UK

    R. Lemmon

  7. The Henryk Niewodniczański Institute of Nuclear Physics, PAN, Kraków, Poland

    R. Wolski

Authors
  1. M. Caamaño
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  2. D. Cortina-Gil
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  3. W. Mittig
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  4. H. Savajols
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  5. M. Chartier
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  6. C. E. Demonchy
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  7. B. Fernández
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  8. A. Gillibert
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  9. M. B. Gómez-Hornillos
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  10. B. Jurado
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  11. O. Kiselev
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  12. R. Lemmon
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  13. A. Obertelli
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  14. F. Rejmund
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  15. M. Rejmund
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  16. P. Roussel-Chomaz
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  17. R. Wolski
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Caamaño, M., Cortina-Gil, D., Mittig, W. et al. The search for 7H. Eur. Phys. J. Spec. Top. 150, 9–12 (2007). https://doi.org/10.1140/epjst/e2007-00252-2

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  • DOI: https://doi.org/10.1140/epjst/e2007-00252-2

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