Abstract

The level structure of superheavy hydrogen and heavy helium isotopes with A = 5, 6, 7 was studied in stopped pion absorption by light nuclei. The measurements were performed at low energy pion channel of LANL with two-arm multilayer semiconductor spectrometer. Excited states of the 5-7H and 5-7He were observed in several reaction channels on the 9Be and 10,11B nuclei. Several excited levels were found only in our measurements. Candidate on isobar-analog state of the 6H ground states with Er ∼ 5.5 MeV was observed in the reaction 10B(π−,pt)X.

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