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自从六十年代初期发现形状同质异能素以来,迄今为止,在锕系区域已发现约有35个核素具有同质异能素。关于基态变形核的核谱已知道得很清楚,而处于第Ⅱ位阱的“基态”变形核——形状同质异能素的核谱,正处在发展中。1977年Habs等人利用电荷柱塞技术测量了~(239)Pu(8μs)的电四极矩,同年Matag等人利用投影技术测量了~(236)pu(～40ps)的电四极矩,从而首次实验证实了形状同质异能素是一种“不完美”的核素,其长短轴之比为2:1的理论预言。
To date, about 35 different radionuclides have been found in the actinides region to have been identified as isoforms since the early 1960s. The nuclei of the ground-state deformed nuclei are well known, and the nuclei of the “ground-state” deformed nuclear-shape metaplenics at the well II are in development. In 1977, Habs et al. Measured the electric quadrupole moment of ~ (239) Pu (8μs) using charge-plunger technique. In the same year Matag et al. Used the projection technique to measure the electric quadrupole moment of ~ (236) pu Thus, the first experiments confirmed that the shape of a HET is an “imperfect” nuclide with a theoretical 2: 1 ratio of the major axis to the other.