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首页> 外文期刊>Physics of atomic nuclei >Nuclear Vertex Constants and Asymptotic Normalization Coefficients for 8Be Resonance States from Effective-Range Expansions for αα Scattering
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Nuclear Vertex Constants and Asymptotic Normalization Coefficients for 8Be Resonance States from Effective-Range Expansions for αα Scattering

机译:8Be共振态的核顶点常数和渐近归一化系数的有效范围扩展,用于αα散射

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摘要

The properties of the first excited state of the ~8Be~? nucleus (2+) are studied. This state corresponds to the resonance in αα scattering at the energy of E_α = E_2 ≈ 3 MeV. Use is made of an expansion of the effective-range function K(k~2). The function K(k~2) is sensitive to the value of E_2. A fit to experimental data on the dependence of the Coulomb-nuclear phase shift δ_2~C on the energy Eα leads to an E_2 value that is smaller than the average value obtained from an analysis of various reactions. The experimental behavior of δ_2~C (E_α) cannot be described satisfactorily by fixing the average value of E_2. The renormalized nuclear vertex function for the process α + α → ~8Be~?(2+) and the asymptotic normalization coefficient for the respectiveGamow wave function are calculated by using the set of parameter values found in the present study.
机译:〜8Be〜?的第一激发态的性质。研究了细胞核(2+)。该状态对应于能量为E_α= E_2≈3 MeV的αα散射中的共振。利用有效范围函数K(k〜2)的扩展。函数K(k〜2)对E_2的值敏感。根据库仑-核相移δ_2〜C对能量Eα的依赖性对实验数据进行拟合,得出的E_2值小于从各种反应分析获得的平均值。通过固定E_2的平均值不能令人满意地描述δ_2〜C(E_α)的实验行为。通过使用本研究中发现的一组参数值,计算过程α+α→〜8Be〜?(2+)的重归一化核顶点函数和各个Gamow波函数的渐近归一化系数。

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