Excitation Mechanisms and Reactions of Light Exotic Nuclei

我们发展了一种高精度的变分方法，称为关联高斯随机变分方法，并将其应用于各种光奇异核的结构研究。该方法的优点是可以考虑组成粒子的相关运动。我们已经证明，为了解释^6HE的结合能，对α核，特别是表面区的真实描述是至关重要的，并且微观α+α+n+n模型可以再现低于^6HE+α阈值的所有能级，包括第二个0^+态。所得结果可望为Be的宇称反转机制提供有用的信息。我们已经证实，束缚态能量作为耦合常数的函数的解析延拓对于预测共振态的复能量(共振能量和宽度)是一种有用的实用工具。由于我们计算的精确度，这是可能的。计算实例包括^5He、^5Li、^6He、^9Be、^9B。注意到，该模型首次成功地预测了^9Be和^9B在阈值附近的1/2^+态的性质。提出了一种完整计算Glauber振幅的方法，并将其用于分析高能p+^6He的弹性散射。我们的波函数在没有任何调整的情况下重现了角分布，这使得我们确定了^6He的大小。如果引入核子-核子散射的有效轮廓函数，这种方法就可以适用于更重的系统。这个想法已经被证明是有用的，并被用来计算各种体系的反应截面和弹性散射截面。

We have developed high accuracy variational approach called the stochastic variational method on correlated Gaussians and applied it to the study of structure of various light exotic nuclei. The method has advantage that it can take into account of correlated motion of the constituent particles. We have shown that to account for the binding energy of ^6He a realistic description of the α core, particularly in the surface region, is vital and that a microscopic α+α+n+n model can reproduce all the levels below the ^6He+α threshold including the second 0^+ state. The result obtained for ^<10>Be will be expected to give useful information on a mechanism of the parity inversion in ^<11>Be.We have confirmed that an analytic continuation of bound state energies as a function of coupling constants can be a useful and practical tool to predict the complex energies (resonance energy and width) of resonance states. This has been made possible by the accuracy of our calculation. Examples of calculation include ^5He, ^5Li, ^6He, ^9Be, ^9B.It is noted that the properties of the 1/2^+ states of ^9Be and ^9B near the threshold are successfully predicted for the first time by this model.A method of complete calculation of the Glauber amplitude has been proposed and applied to analyze the elastic scattering of p+^6He at high energy. Our ^6He wave function has reproduced the angular distribution without any adjustment, which has led to a firm determination of the size of.^6He. In order to go to heavier system, this approach becomes practicable if one introduces an effective profile function of nucleon-nucleus scatterings. This idea has been tested to be useful and used to calculate the reaction cross sections and elastic scattering cross sections of various systems.