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利用在束γ谱学技术 ,通过 12 8Te(10 B ,1p3n) 13 4 Ba反应研究了 13 4 Ba的中、高自旋激发态 .实验中采用 9套BGO(AC)HPGe探测器进行了γ γ t符合测量 .基于γ γ符合关系、γ射线的相对强度和各向异性度的测量结果建立了 13 4 Ba的能级纲图 .比较N =78的同中子素链的负宇称能级结构的系统性 ,发现激发能位于 4 14 2keV ,Jπ 值为 11-的能级很可能是与 13 6Ce具有相似内禀结构特征的相似态
The medium and high spin excited states of 13 4 Ba were investigated by means of beam γ-spectroscopy using 12 8Te (10 B, 1p3n) 13 4 Ba reaction. Nine sets of BGO (AC) HPGe detectors were used to investigate γ γ t Conforming to the measurement.An energy level scheme of 13 4 Ba was established based on the measurement of γ γ coincidence and the relative intensity and the degree of anisotropy of γ rays.Comparing the negative parity structure of neutron chain with N = 78 , We find that the energy level at 4 14 2keV and Jπ 11- is most likely to be similar to 13 6Ce with similar intrinsic structural features