Coulomb excitation of the deuteron in peripheral collisions with a heavy ion
Coulomb excitation of the deuteron in peripheral collisions with a heavy ion
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氘核与重离子的外围碰撞中的库仑激发
DOI：
10.1103/physrevc.97.064620
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发表时间：
2018
影响因子：
3.1
通讯作者：
Vary James P
中科院分区：
文献类型：
--
作者：
Du Weijie;Yin Peng;Li Yang;Chen Guangyao;Zuo Wei;Zhao Xingbo;Vary James P
我们发展了一种从头算、非微扰、含时基函数(TBF)方法来统一求解核结构和散射问题。我们将这种方法应用于一个测试问题：重离子入射对俘获的重离子的库仑激发。通过从头算核结构计算，实现了与弱外部陷阱的真实核子间相互作用，实现了质心的局域化和连续体的离散化。利用散射场的运动方程，直接求解了氢气系统内态的演化。通过研究其内部跃迁几率和可观测值随曝光时间和入射速度的变化，分析了该系统的激发机制。在本研究中，通过系统内部电荷分布的时间演化揭示了库仑激发的动力学。
We develop an ab initio, nonperturbative, time-dependent basis function (tBF) method to solve the nuclear structure and scattering problems in a unified manner. We apply this method to a test problem: the Coulomb excitation of a trapped deuteron by an impinging heavy ion. The states of the deuteron system are obtained by the ab initio nuclear structure calculation implementing a realistic internucleon interaction with a weak external trap to localize the center of mass and to discretize the continuum. The evolution of the internal state of the deuteron system is directly solved using the equation of motion for the scattering. We analyze the excitation mechanism of the deuteron system by investigating its internal transition probabilities and observables as functions of the exposure time and the incident speed. In this investigation, the dynamics of the Coulomb excitation are revealed by the time evolution of the system's internal charge distribution.