排序方式: 共有46条查询结果,搜索用时 172 毫秒
1.
2.
运用p-γ符合测量技术,详细研究了T 相似文献
3.
4.
5.
The LPT (Lanzhou Penning Trap) is under construction and its task is to perform direct mass measurement of fusion-evaporation residues and if possible for heavy isotopes. Detailed simulations have been done for a good understanding to the ion’s movement and mechanics in the trap. The optimization of the LPT is also performed based on the simulation. With a scale of 0.5 mm per grid used in the simulation and many other limitations a highest mass resolution has been achieved to be 1.9×10-5. An unexpected behaviour in the simulation related to magnetron motion has been found. 相似文献
6.
7.
8.
运用p-γ符合测量技术,详细研究了Tz=1/2系列核素81Zr和85Mo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,85Mo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-,85Mo的基态自旋和宇称为1/2-. 81Zr的质量剩余为(-58.3±0.2) MeV, 85Mo的质量剩余为(-59.1±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)×10-3,85Mo延迟发射质子的分支比为(1.4±0.2)×10-3. 相似文献
9.
10.
报道了利用兰州重离子研究装置提供的26Mg重离子束流轰击243Am靶产生和鉴别已知超重核素266Bh的实验结果。利用转轮收集探测装置依靠母子核遗传关系通过观测Bh同位素与其子核Db和Lr之间的α-α关联事件来鉴别266Bh。实验中观测到266Bh的α能量为(9.03 ± 0.08)MeV, 与日本理化学研究所在合成113号元素中第一个衰变链中观测到266Bh的α能量为9.07 MeV相近。 266Bh的半衰期为0.66+0.59-0.26 s, 从实验得到的Qα也符合Z=107的Qα随中子数变化的系统性。The isotope of 266Bh was produced and identified definitely in bombardments of 243Am target with 162 MeV 26Mg ions at HIRFL. Identification was made by observation of correlated α particle decays between the Bh isotopes and their Db and Lr daughters using a rotating wheel system. The measured α energy for 266Bh is (9.03±0.08) MeV, and this value close to the 9.07 MeV for 266Bh observed in the first chain of element 113 at RIKEN. The half life of 266Bh is 0.66+0.59 -0.26 s. The Qα value derived from this experiment fits well into the general trend in a “Qα N systematics” for the isotopes with Z = 107. 相似文献