洛伦兹积分变换的能量分解
Energy Resolution with the Lorentz integral transform
摘要：
简要概述了洛伦兹积分变换（LIT）方法。该方法是行之有效的，并允许处理的多体连续与束缚态的技术一样的反应。通过一个简单的两体反应，可以实现的能量分辨率进行了研究。从讨论中可以清楚地看出，LIT方法是一种具有受控分辨率的方法，即使在多体连续体中解决窄共振也没有原则问题。作为例子，考虑了~ 4 He的等谐共振。指出了选择适当的基来展开LIT态的重要性。采用这样的基础时，发现180（70）keV的宽度为4 He的Isoscillation共振时，使用一个简单的中心核子-核子势模型。
英文摘要：
A brief outline of the Lorentz Integral Transform (LIT) method is given. The method is well established and allows to treat reactions into the many-body continuum with bound-state like techniques. The energy resolution that can be achieved is studied by means of a simple two-body reaction. From the discussion it will become clear that the LIT method is an approach with a controlled resolution and that there is no principle problem to even resolve narrow resonances in the many-body continuum. As an example the isoscalar monopole resonance of 4He is considered. The importance of the choice of a proper basis for the expansion of the LIT states is pointed out. Employing such a basis a width of 180(70) keV is found for the 4He isoscalar monopole resonance when using a simple central nucleon-nucleon potential model.
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