排序方式: 共有19条查询结果,搜索用时 15 毫秒
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在中国原子能科学研究院的HI 13串列加速器上通过157Gd(19F,5n)171Ta重离子熔合蒸发反应布居了171Ta的高自旋态,以多普勒移动衰减法的峰形分析法分析了171Tah9/2质子1/2[541]转动带的6条能级的寿命,得到了这6条能级的平均寿命值. The high spin states of~(171)Ta have been populated via heavy ion fusion evaporation reaction~(157)Gd(~(19)F, 5n)~(171)Ta at the HI-13 tandem accelerator in China Institute of Atomic Energy. The lifetimes of the high spin states in~(171)Ta have been measured by using the Doppler Shift Attenuation Method (DSAM). Six levels of its h_(9/2) proton 1/2\ band have been analyzed and their lifetimes have been deduced from the experimental data. 相似文献
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马鹰俊崔保群晏明芳马瑞刚陈立华唐兵黄青华 《原子核物理评论》2015,(S1):1-4
中国原子能科学研究院已经建成一台"在线同位素分离器"(BRISOL),在线产生并分离出需要的放射性离子束用于天体物理、核结构和材料科学等研究。其中研制的放射性核束鉴别装置,用来测量并鉴别能量30~300 ke V、束流强度在10~4~10^(11)Particle/s放射性离子束(RIB)的种类。介绍了该装置的原理、组成及调试结果。该装置结构紧凑,可在有限空间内完成核素的积累、转运和能谱测量。该装置已经用于"在线同位素分离器"的在线调试,通过在线获取的射线能谱确认了产生的38K+放射性同位素并给出放射性束流的强度。 相似文献
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The high spin states of 106Ag were populated via the fusion-evaporation reaction 100Mo(11B,5n)106Ag at a beam energy of 60 MeV. A new level scheme of 106Ag is presented. The positive parity band based on the configuration of πg9/2⊙ν[h211/2(g7/2/d5/2)] is assigned to magnetic rotation band of shears mechanism. Theoretical calculation of the effective interaction on the basis of TAC mode were also performed, the calculated results agrees well with the value extracted from the experiment. 相似文献
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HI-13串列加速器升级工程中的ISOL高质量分辨谱仪要求20000的质量分辨率, 分析磁铁磁场均匀性要求好于1×10-5。 要达到这样高的磁场均匀性, 必须对磁铁进行垫补。 介绍了二极铁表面线圈垫补均匀场的设计方法和制作工艺, 并且基于现有的一块C型二极铁对表面线圈垫补均匀场的方法进行了实验研究。 实验结果表明, 采用表面线圈垫补后, 场均匀性提高了一个数量级, 积分场的均匀性从5×10-4提高到3×10-5。 The mass resolving power of ISOL’s spectrometer for Beijing Radioactive Ion beam Facilities project is 20000, which requires the field uniformity of the magnet better than 1×10-5. To achieve such a high uniformity field,field optimize is indispensable. This paper presents the design method,manufacture techniques and experiment results of surface coils,which are set on pole face of a dipole to improve the magnetic field homogeneity. The integral field uniformity with surface coil is optimized to 3×10-5 from 5×10-4,which is improved roughly an order of magnitude. 相似文献
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通过计算机模拟计算与实验相结合,讨论了真空盒磁导率对二极磁铁磁场分布的影响.结果表明当真空盒磁导率μr≠1时,真空盒将影响磁铁磁场分布,在磁场均匀性要求很高时,必须考虑真空盒的材料与尺寸对磁场均匀性的影响. 相似文献