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首页> 外文期刊>Physical Review C >Spectroscopic factors in the N = 20 island of inversion: The Nilsson strong- coupling limit
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Spectroscopic factors in the N = 20 island of inversion: The Nilsson strong- coupling limit

机译：n = 20岛反转的光谱因素：尼尔森强耦合限制

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摘要

Spectroscopic factors, extracted from one-neutron knockout andCoulomb dissociation reactions, for transitions from the ground state of ~(33)Mg to the ground-state rotational band in ~(32)Mg, and from ~(32)Mg to low-lying negativeparity states in ~(31)Mg, are interpreted within the rotational model. Associating the ground state of ~(33)Mg and the negative-parity states in ~(31)Mg with the 3/2 [321] Nilsson level, the strong coupling limit gives simple expressions that relate the amplitudes (C_(jℓ)) of this wave function with the measured cross sections and derived spectroscopic factors (S_(jℓ)). To obtain a consistent agreement with the data within this framework, we find that one requires a modified 3/2 [321] wave function with an increased contribution from the spherical 2p_ (3/2) orbit as compared to a standard Nilsson calculation. This is consistent with the findings of large-scale shell model calculations and can be traced to weak binding effects that lower the energy of low-ℓ orbitals.
机译：从一个中子敲除和综合解离反应中提取的光谱因素，从〜（33）Mg的地位到〜（32）mg的地位旋转带的接地状态过渡，从〜（32）mg到低洼在〜（31）mg中，在旋转模型中解释负差态。将〜（33）mg的地位与〜（31）mg的负奇偶校验状态相关联，具有3/2 [321]尼尔逊水平，强耦合限制为幅度提供了简单的表达式（C_（jℓ））该波函数与测量的横截面和衍生的光谱因子（S_（Jℓ））。为了与本框架内的数据获得一致的协议，我们发现一个需要修改的3/2 [321]波函数，与标准的Nilsson计算相比，具有来自球面2P_（3/2）轨道的增加的贡献。这与大规模壳模型计算的结果一致，并且可以追溯到较弱的结合效应，降低低ℓ轨道的能量。

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  • 来源
    《Physical Review C》 |2017年第2017期|054302.1-054302.4|共4页
  • 作者

    A. O. Macchiavelli; H. L. Crawford; C. M. Campbell; R. M. Clark; M. Cromaz; P. Fallon; M. D. Jones; I. Y. Lee; A. L. Richard; M. Salathe;

  • 作者单位

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

    Department of Physics and Astronomy Ohio University Athens Ohio 45701 USA;

    Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA;

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