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运用p γ符合测量技术 ,详细研究了Tz=1 /2系列核素81Zr和85 Mo的β延迟质子衰变 .获得了β衰变后发射质子布居到子核的第 1激发态的质子谱 .测量得81Zr的半衰期为 ( 5 .3± 0 .5 )s,85 Mo的半衰期为 ( 3.2± 0 .2 )s .利用统计模型理论计算和实验值的比较以及系统性分析 ,暂时指定81Zr的基态自旋和宇称为 3/2 -,85 Mo的基态自旋和宇称为 1 /2 -.81Zr的质量剩余为 ( - 5 8.3± 0 .2 )MeV ,85 Mo的质量剩余为 ( - 5 9.1± 0 .4)MeV .结合实验测得的半衰期和理论计算所得的质子发射部分半衰期 ,得81Zr延迟发射质子的分支比为 ( 1 .2± 0 .2 )× 1 0 -3 ,85 Mo延迟发射质子的分支比为 ( 1 .4± 0 .2 )× 1 0 -3 .
Using the p γ coincidence measurement technique, β-delayed proton decay of TZ = 1/2 nuclides 81Zr and 85 Mo was studied in detail, and the proton spectrum of the first excited state with the proton population advancing to the nucleus was obtained after β decay. The half-life of 81Zr is (5.3 ± 0.5) s, and the half-life of 85 Mo is (3.2 ± 0.2) s. By comparing the theoretical calculation of the model with the experimental data and systematic analysis, the ground state of 81Zr The mass spins of the spin and the parity gyration of 3/2 -, 85 Mo and the mass of the mass parity of parity parity between 1 / 2-8.1Zr are (-5.33 ± 0.2) MeV, the mass balance of 85Mo is (- 5 9.1 ± 0. 4) MeV. The half-lives and theoretical half-lives of the proton-emitting moiety obtained from the experiments were obtained. The branching ratio of the 81Zr delayed proton emission was (1.2 ± 0.2) × 10-3, 85 The branching ratio of Mo delayed proton emission was (1.4 ± 0.2) × 10-3.