Eikonal Reaction Theory for Neutron Removal Reaction
Eikonal Reaction Theory for Neutron Removal Reaction
复制标题
中子去除反应的方程反应理论
DOI：
10.1143/ptp.126.167
复制
发表时间：
2011
影响因子：
--
通讯作者：
K. Minomo
中科院分区：
文献类型：
--
作者：
M. Yahiro;K. Ogata;K. Minomo
中子去除反应是研究弱结合核的最重要的实验工具之一，因为它们产生有关射弹中最后一个中子的单粒子态的信息。 Nakamura 等人测量了位于“反转岛”区域的 Ne 射弹的单中子去除截面 σ−n。 [1]。根据σ−n 的分析，测量结果分析表明Ne 的自旋宇称J 为J = 3/2− ，具有晕结构。然而，这一点尚有争议。最近，我们引入了一种精确的方法来处理由核相互作用和库仑相互作用引起的中间入射能量下的中子去除反应[2]。该方法通过连续离散耦合通道的方法一致地处理核和库仑破裂过程，而不对库仑相互作用进行绝热近似，因此计算的去除截面不会发散，因此即使在存在库仑相互作用的情况下也是可靠的。这种方法称为 eikonal 反应理论 (ERT)。在本次演讲中，我们将介绍 ERT 并将其应用于一个和两个中子去除反应。氖的自旋宇称是通过分析测得的来自 C 和 Pb 靶的氖射弹的单中子去除截面来确定的。当 J = 3/2− 时，光谱因子和最后评估的中子的渐近归一化系数几乎与目标无关，但对于 J = 7/2− 则不然。然后我们得出结论 J = 3/2− 是最可靠的。通过ERT对测量的He从C和Pb中去除一中子和二中子的截面进行了分析，并成功地再现了数据。将双中子去除反应的机理与单中子去除反应的机理进行了比较，并研究了双中子相关性对这些反应的影响。最后，我们预测 Ne 的双中子去除截面，以了解双中子相关效应对较重弹丸的影响。
Neutron removal reactions are one of the most important experimental tools to investigate weakly-bound nuclei, since they yield information on the single particle state of the last neutron in the projectile. The one-neutron removal cross sections σ−n of the Ne projectile, which resides in the region of “Island of inversion”, were measured by Nakamura et al. [1]. According to the analysis of σ−n, The analysis of the measurement suggests that the spinparity J of Ne is J = 3/2− with a halo structure. This is, however, under debate. Very recently, we introduced an accurate method of treating the neutron removal reaction at intermediate incident energies induced by both nuclear and Coulomb interactions [2]. In the method, the nuclear and Coulomb breakup processes are treated consistently by the method of continuum discretized coupled channels without making the adiabatic approximation to the Coulomb interaction, so that the removal cross section calculated never diverges and hence reliable even in the presence of the Coulomb interaction. This method is called the eikonal reaction theory (ERT). In this talk, we present ERT and apply it to oneand two-neutron removal reactions. The spin-parity of Ne is determined by analyzing the measured one-neutron removal cross sections of Ne projectile from C and Pb targets. The spectroscopic factors and the asymptotic normalization coefficients of the last neutron evaluated are almost independent of the targets for J = 3/2−, but not for J = 7/2−. We then conclude that J = 3/2− is most reliable. The measured oneand two-neutron removal cross sections of He from C and Pb are analyzed by ERT with success of reproducing the data. The mechanism of the two-neutron removal reactions are compared with that of the one-neutron ones, and also the effect of di-neutron correlations on these reactions are investigated. Finally, we predict the two-neutron removal cross section of Ne to see the di-neutron correlation effect on heavier projectiles.
Eikonal 模型中单中子晕核的破裂
DOI：
--
发表时间：
2004
期刊：
Prog.Theor.Phys. 112
影响因子：
--
作者：
Y.Fujiwara;K.Miyagawa;M.Kohno;Y.Suzuki;B.Abu-Ibrahim;Y.Fujiwara;Y.Suzuki;B.Abu-Ibrahim
通讯作者：
B.Abu-Ibrahim
影响因子：
3.1
作者：
Y. Utsuno;T. Otsuka;T. Mizusaki;M. Honma
通讯作者：
Y. Utsuno;T. Otsuka;T. Mizusaki;M. Honma
DOI：
--
发表时间：
2003
期刊：
Physical Review C68
影响因子：
--
作者：
K.Ghoroku;M.Yahiro;Ghoroku et al.;T.Matsurmoto et al.;K.Ogata et al.
通讯作者：
K.Ogata et al.