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Structure of Fe-70: Single-particle and collective degrees of freedom

机译:FE-70的结构:单粒子和集体自由度

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Excited states in the neutron-rich Fe-70 nucleus were populated in a one-proton removal reaction from Co-71 projectiles at 87 MeV/nucleon. A new transition was observed with the gamma-ray tracking array GRETINA and shown to feed the previously assigned 4(1)(+) state. In comparison to reaction theory calculations with shell-model spectroscopic factors, it is argued that the new gamma ray possibly originates from the 6(1)(+) state. It is further shown that the Doppler-reconstructed gamma-ray spectra are sensitive to the very different lifetimes of the 2(+) and 4(+) states, enabling their approximate measurement. The emerging structure of Fe-70 is discussed in comparison to LNPS-new large-scale shell-model calculations.
机译:富含中子的Fe-70核中的激发态在87meV / NucleoN的Co-71射弹中填充在一质子去除反应中。 用伽马射线跟踪阵列Gretina观察到新的过渡,并显示为先前分配的4(1)(+)状态。 与壳模型光谱因素的反应理论计算相比,认为新的伽玛射线可能来自6(1)(+)状态。 进一步示出了多普勒重建的伽马射线光谱对2(+)和4(+)状态的非常不同的寿命敏感,从而实现了它们的近似测量。 与LNPS新的大规模壳模型计算相比,讨论了FE-70的新兴结构。

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