Photo-response of the $$N=Z$$ nucleus $$^{24}$$Mg
Photo-response of the $$N=Z$$ nucleus $$^{24}$$Mg
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$$N=Z$$ 核的光响应 $$^{24}$$Mg
DOI：
10.1140/epja/s10050-023-01111-7
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Deary J
中科院分区：
文献类型：
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作者：
Deary J
在非弹性光子散射实验中研究了核Mg的电E1和磁M1偶极子响应。 13.0 MeV 电子用于在 Mg() 反应的入口通道中产生非极化轫致辐射，由德累斯顿-罗森多夫亥姆霍兹中心的 ELBE 加速器传输。准直轫致辐射光子激发了镁的一、四和六态。使用 ELBE 设置的四个高纯度锗探测器检测去激发射线，该探测器专用于核磁共振荧光实验。在高达 13.0 MeV 的能量区域中观察到总能量，但该核仅表现出小于 efm 的边际 E1 强度。支化比与 Alaga 规则的预期结果相结合表明 K 是 Mg 的一个很好的近似量子数。使用 10.712 MeV 水平的已知强度和测量的分支比，可以在二态混合模型中提取基于 6432 keV 水平的长长基态结构和形状共存超变形结构之间的差异。
The electricE1 and magneticM1 dipole responses of thenucleusMg were investigated in an inelastic photon scattering experiment. The 13.0 MeV electrons, which were used to produce the unpolarised bremsstrahlung in the entrance channel of theMg() reaction, were delivered by the ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf. The collimated bremsstrahlung photons excited one, four, and sixstates inMg. De-excitationrays were detected using the four high-purity germanium detectors of theELBE setup, which is dedicated to nuclear resonance fluorescence experiments. In the energy region up to 13.0 MeV a totalis observed, but thisnucleus exhibits only marginalE1 strength of less thanefm. Thebranching ratios in combination with the expected results from the Alaga rules demonstrate thatKis a good approximative quantum number forMg. The use of the knownstrength and the measuredbranching ratio of the 10.712 MeVlevel allows, in a two-state mixing model, an extraction of the differencebetween the prolate ground-state structure and shape-coexisting superdeformed structure built upon the 6432-keVlevel.