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arXiv 0912.1895nucl-th
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三体连续体强度函数的格林函数法

Green's function method for strength function in three-body continuum

Y. Suzuki, W. Horiuchi, D. Baye

摘要:

分析了用离散连续体计算三体系统偶极强度的实用方法。涉及格林函数的新技术的开发,无论是通过校正的尾部的近似波函数的强度函数的直接计算,或通过使用一个驱动的薛定谔方程的强度的总和表达式的解决方案。他们比较复杂的标度法和洛伦兹积分变换,也利用离散连续。在超球谐形式下,用一个超标量三体势进行了数值试验。结果表明,由于逆变换困难,洛伦兹积分变换法的实用性较差。这些其他方法通常提供相当的精度。

英文摘要:

Practical methods to compute dipole strengths for a three-body system by using a discretized continuum are analyzed. New techniques involving Green's function are developed, either by correcting the tail of the approximate wave function in a direct calculation of the strength function or by using a solution of a driven Schroedinger equation in a summed expression of the strength. They are compared with the complex scaling method and the Lorentz integral transform, also making use of a discretized continuum. Numerical tests are performed with a hyperscalar three-body potential in the hyperspherical-harmonics formalism. They show that the Lorentz integral transform method is less practical than the other methods because of a difficult inverse transform. These other methods provide in general comparable accuracies.

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