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Spectroscopy of the 5H superheavy hydrogen isotope

  • Fields, Particles, and Nuclei
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Abstract

The formation of the 5H superheavy hydrogen isotope was experimentally sought in the reactions induced by stopped π− mesons absorbed by 9Be nuclei. Peaks in missing-mass spectra were observed in two reaction channels, 9Be(π−, pt)X and 9Be(π−, dd)X, and were attributed to the 5H resonance states. The lowest state has parameters Er=5.5±0.2 MeV and Г=5.4±0.5 MeV [E r is the resonance energy measured from the (triton + two neutrons) threshold]. Therefore, 5H is bound more weakly than 4H. Excited states of 5H were also observed. All three resonance levels (E 1r=10.6±0.3 MeV, Г1r=6.8±0.5 MeV; E 2r=18.5±0.4 MeV, Г2r=4.8±1.3 MeV; E 3r=26.7±0.4 MeV, Г3r=3.6±1.3 MeV) can decay into five free nucleons.

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Authors and Affiliations

  1. Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 115409, Russia

    M. G. Gornov, M. N. Ber, Yu. B. Gurov, S. V. Lapushkin, P. V. Morokhov, V. A. Pechkurov, N. O. Poroshin, M. V. Tel’kushev & B. A. Chernyshev

  2. Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia

    V. G. Sandukovsky

Authors
  1. M. G. Gornov
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  2. M. N. Ber
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  3. Yu. B. Gurov
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  4. S. V. Lapushkin
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  5. P. V. Morokhov
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  6. V. A. Pechkurov
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  7. N. O. Poroshin
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  8. V. G. Sandukovsky
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  9. M. V. Tel’kushev
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  10. B. A. Chernyshev
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Additional information

__________

Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 77, No. 7, 2003, pp. 412–416.

Original Russian Text Copyright © 2003 by Gornov, Ber, Gurov, Lapushkin, Morokhov, Pechkurov, Poroshin, Sandukovsky, Tel’kushev, Chernyshev.

Deceased.

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Gornov, M.G., Ber, M.N., Gurov, Y.B. et al. Spectroscopy of the 5H superheavy hydrogen isotope. Jetp Lett. 77, 344–348 (2003). https://doi.org/10.1134/1.1581957

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  • DOI: https://doi.org/10.1134/1.1581957

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