The deformedN=60 nucleus41101Nb
The deformedN=60 nucleus41101Nb
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变形N=60核41101Nb
DOI：
10.1007/bf01284474
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
R. Meyer
中科院分区：
文献类型：
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作者：
H. Ohm;M. Liang;U. Paffrath;B. Sutter;K. Sistemich;A. Schmitt;N. Kaffrell;N. Trautmann;T. Seo;K. Shizuma;G. Molnár;K. Kawade;R. Meyer
在JOSEF和LOHENGRIN裂变产物分离器上研究了101zr的β−衰变。101zr的半衰期为2.5(1)s，并通过γ射线单峰、X/3-γ和γ -γ符合测量建立了101nb的能级方案。已经确定了101nb跃迁的转换系数和10ps到2ns之间的半衰期。三个旋转带在低洼层中被识别，带头分别为0 keV， 206 keV和208 keV。这些谱带可能分别基于Nilsson构型[422 5/2+]、[301 3/2−]和[303 5/2−]。根据基态带和基态带第一和第二激发态成员的半衰期，确定了基态带和基态带的形变βq=0.40(4)和0.41(8)。这表明，在N=60处迅速开始的形变（这是富中子核A=100区域的典型现象）也发生在Nb同位素中。尼尔森模型计算很好地描述了实验数据，特别是几个确定的跃迁概率，包括从206和208 keV带头到基态的E1跃迁概率。
The β− decay of101Zr has been investigated at the fission-product separators JOSEF and LOHENGRIN. The half-life of101Zr has been determined to 2.5(1) s and a level scheme for101Nb has been established fromγ ray singles as well as X/3-γ and γ—γ coincidence measurements. Conversion coefficients for transitions in101Nb and level half-lives between 10 ps and 2 ns have been determined. Three rotational bands are identified among the low-lying levels with band heads at 0 keV, 206 keV and 208 keV. The bands are probably based on the Nilsson configurations [422 5/2+], [301 3/2−] and [303 5/2−], respectively. The deformation has been determined to βq=0.40(4) and 0.41(8) for the ground state band and the band based on the 206 keV level from the half-lives of the first and second excited members of these bands. This shows that the rapid onset of deformation at N=60 which is typical for the A=100 region of neutron-rich nuclei, takes also place in the Nb isotopes. Nilsson model calculations describe the experimental data well, especially the several determined transition probabilities including those for E1 transitions from the 206 and 208 keV band heads to the ground state.