2020, Sandukovsky, V. G., Chernyshev, B., Gurov, Y. B., Lapushkin, S. V., Leonova, T. I., Schurenkova, T., Telkushev, M. V., Чернышев, Борис Андреевич, Гуров, Юрий Борисович, Леонова, Татьяна Игоревна, Щуренкова, Татьяна Дмитриевна

© Published under licence by IOP Publishing Ltd.The formation of the 10He states was studied in the reaction of stopped pion absorption 14C(π-, p 3He)X. Measurements were carried out using two-Arm multilayer semiconductor spectrometer and "radioactive"target consisting of 76% 14C and 23% 12C. The contribution of uncontrolled impurities in the target was ≤ 1%. In order to determine the contribution of the 12C impurity measurements were performed on an isotope pure carbon 12C target. An indication on the excitation state with Ex ∼ 6 MeV (Er ∼ 7 MeV) was observed in missing mass spectrum of 14C(π-, p 3He)X reaction. Comparison with theoretical and experimental results obtained by other authors was performed.

2019, Chernyshev, B., Gurov, Y., Lapushkin, S., Karpukhin, V., Sandukovsky, V., Schurenkova, T., Чернышев, Борис Андреевич, Гуров, Юрий Борисович, Щуренкова, Татьяна Дмитриевна

© Published under licence by IOP Publishing Ltd.The production of the 7He states was studied in the reactions of stopped pion absorption by carbon isotopes: 12C(π-, p4He)7He, 12C(π-, d3He)7He and 14C(π-, t4He)7He. Measurements were performed using two-arm multilayer semiconductor spectrometer. The ground and excited states were observed in all three reactions. Narrow (Γ < 2 MB) state with the high excitation energy ≈ 16 MeV was observed in the 14C(π-, t4He)7He reaction.