The structure of levels of the ⁸He heavy helium isotope has been studied in the ⁹Be\(({{\pi }^{ - }},p)X\) and ¹⁰B\(({{\pi }^{ - }},pp)X\) stopped pion absorption reactions. Measurements have been performed with a two-arm multilayer semiconductor spectrometer at the LANL. Indications to the existence of a soft dipole mode at the excitation energy \({{E}_{x}} \approx 3\) MeV have been obtained. A state with a high excitation energy of 12.2(5) MeV has been observed for the first time.

中文翻译：

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在9 Be（π-，p）X和10 B（π-，pp）X中形成8 He停止了Pion的吸收反应

所述的电平的结构⁸赫重氦同位素已经研究了在⁹成为\（（{{\ PI} ^ { - }}，P）X \）和¹⁰乙\（（{{\ PI} ^ { -}}，pp）X \）停止了pion吸收反应。在LANL用两臂多层半导体光谱仪进行了测量。已经获得了在激发能\（{{E} _ {x}} \约3 \） MeV下存在软偶极子模式的指示。首次观察到具有12.2（5）MeV的高激发能的状态。