Abstract
Experimental searches for the superheavy hydrogen isotope 7H were performed in reactions involving the absorption of stopped π − mesons on 9Be and 11B nuclei. In the reaction 9Be(π −, pp)X, the missing-mass spectrum shows evidence for the formation of 7H states, that of E r = 16 ± 1 MeV and Γ ≅ 2 MeV and that of E r = 21 ± 1 MeV and Γ ≅ 5 MeV (E r is the resonance energy with respect to breakup into a trition and four neutrons, and Γ is the observed level width).
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Original Russian Text © Yu.B. Gurov, D.V. Aleshkin, S.V. Lapushkin, I.V. Laukhin, V.A. Pechkurov, N.O. Poroshin, V.G. Sandukovsky, M.V. Tel’kushev, B.A. Chernyshev, 2006, published in Yadernaya Fizika, 2006, Vol. 69, No. 9, pp. 1483–1487.
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Gurov, Y.B., Aleshkin, D.V., Lapushkin, S.V. et al. Searches for the superheavy hydrogen isotope 7H in the absorption of stopped π − mesons. Phys. Atom. Nuclei 69, 1448–1452 (2006). https://doi.org/10.1134/S106377880609002X
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DOI: https://doi.org/10.1134/S106377880609002X