The formation of the superheavy hydrogen isotope H-6 in the absorption of stopped pi(-)-mesons by nuclei

An experimental search for the superheavy hydrogen isotope H-6 was conducted through studying the absorption of stopped pi(-)-mesons by Be-9 and B-11 nuclei. A structure in the missing mass spectrum caused by the resonance states of H-6 was observed in three reaction channels, namely, Be-9(pi(-), pd)X, B-11(pi(-), d(3)He)X, and B-11(pi(-), p(4)He)X. The parameters of the lowest state E-r = 6.6 +/- 0.7 MeV and Gamma = 5.5 +/- 2.0 MeV (E-r is the resonance energy with respect to the disintegration into the triton and three neutrons) are evidence that H-6 is a more weakly bound system than H-4 and H-5. Three excited states of H-6 were observed. Their resonance levels (E-1r = 10.7 +/- 0.7 MeV, Gamma(1r) = 4 +/- 2 MeV, E-2r = 15.3 +/- 0.7 MeV, Gamma(2r) = 3 +/- 2 MeV, and E-3r = 21.3 +/- 0.4 MeV, Gamma(3r) = 3.5 +/- 1.0 MeV) are energetically capable of disintegrating into six free nucleons. (C) 2003 MAIK "Nauka / Interperiodica"

The formation of the superheavy hydrogen isotope H-6 in the absorption of stopped pi(-)-mesons by nuclei

An experimental search for the superheavy hydrogen isotope H-6 was conducted through studying the absorption of stopped pi(-)-mesons by Be-9 and B-11 nuclei. A structure in the missing mass spectrum caused by the resonance states of H-6 was observed in three reaction channels, namely, Be-9(pi(-), pd)X, B-11(pi(-), d(3)He)X, and B-11(pi(-), p(4)He)X. The parameters of the lowest state E-r = 6.6 +/- 0.7 MeV and Gamma = 5.5 +/- 2.0 MeV (E-r is the resonance energy with respect to the disintegration into the triton and three neutrons) are evidence that H-6 is a more weakly bound system than H-4 and H-5. Three excited states of H-6 were observed. Their resonance levels (E-1r = 10.7 +/- 0.7 MeV, Gamma(1r) = 4 +/- 2 MeV, E-2r = 15.3 +/- 0.7 MeV, Gamma(2r) = 3 +/- 2 MeV, and E-3r = 21.3 +/- 0.4 MeV, Gamma(3r) = 3.5 +/- 1.0 MeV) are energetically capable of disintegrating into six free nucleons. (C) 2003 MAIK "Nauka / Interperiodica"