磁偶极强度的详细视图：半幻核$^{50}$Ti的情况
A detailed view at magnetic dipole strengths: The case of semi-magic $^{50}$Ti
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- Florida State University（佛罗里达州立大学）
- Technische Universität Darmstadt（达姆施塔特工业大学）
- KU Leuven（荷语鲁汶大学）
- Duke University（杜克大学）
- Triangle Universities Nuclear Laboratory（三角大学核实验室）
- Western Michigan University（西密歇根大学）
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中文总结 AI 辅助
本研究通过多种探针组合测量半幻核$^{50}$Ti的磁偶极强度，发现中子自旋翻转跃迁贡献微小，挑战了$fp$壳层自旋翻转强度的标准微观起源图像。
中文摘要 AI 辅助
通过结合$(d,p)$单中子转移、$(\u03b3,\u03b3')$实光子散射、极端后角$(e,e')$非弹性散射以及$E_p = 210$ MeV极端前角$(p,p')$的数据，研究了半幻核$^{50}$Ti中直至中子分离阈值的磁偶极$M1$强度。所有探针的结合提供了对中子自旋翻转贡献的独特访问途径，并能够评估其在产生自旋翻转$M1$强度中的作用。通过$(d,p)$反应探测的中子$(1f_{7/2})^{-1}(1f_{5/2})^{+1}$自旋翻转跃迁对$^{50}$Ti总强度的贡献很小，这对$fp$壳层中自旋翻转强度微观起源的标准图像提出了质疑。对于$^{50}$Ti，本文表明具有较大中子$(1f_{7/2})^{-1}(1f_{5/2})^{+1}$谱因子的$J^{\u03c0} = 1^+$态并不对应于具有最大$B(M1;0^+_1 \rightarrow 1^+_i)$强度的态。
英文摘要
Magnetic dipole, $M1$, strengths were studied in semi-magic $^{50}$Ti up to the neutron-separation threshold by combining data from $(d,p)$ one-neutron transfer, $(γ,γ')$ real-photon scattering, $(e,e')$ inelastic scattering at extreme backward angles, and $(p,p')$ at $E_p = 210$ MeV and extreme forward angles. The combination of all probes provided unique access to the neutron spin-flip contribution and the possibility to evaluate its role in generating the spin-flip $M1$ strengths. The small contribution of the neutron $(1f_{7/2})^{-1}(1f_{5/2})^{+1}$ spin-flip transitions, which were probed with the $(d,p)$ reaction, to the overall strength in $^{50}$Ti questions the standard picture for the microscopic origin of spin-flip strength in the $fp$ shell. For $^{50}$Ti, this letter shows that $J^π = 1^+$ states with larger neutron $(1f_{7/2})^{-1}(1f_{5/2})^{+1}$ spectroscopic factors do not correspond to the ones with the largest $B(M1;0^+_1 \rightarrow 1^+_i)$ strengths.
