论文标题
在Ti，Cr和Fe同位素的反转岛边缘的总反应横截面的大大增强
Large enhancement of total reaction cross sections at the edge of the island of inversion in Ti, Cr, and Fe isotopes
论文作者
论文摘要
对富含中子的Ti，Cr和Fe同位素进行了核变形的系统分析，以探索近n = 40的反转岛的核结构，并预测了强核变形。核接地状态是通过三维坐标空间中的Skyrme Hartree-fock方法获得的，该方法正确地描述了任何核形状。使用三种类型的Skyrme相互作用来在其同位素链中产生各种变形状态。我们发现，在反转岛上，高度伸长的入侵轨道的占用不仅会引起大型四极变形，而且还引起大型六烷二铁变形。这似乎是核物质半径的相当大的增强，显示了核表面附近密度谱的特征性壳效应。我们表明，可以通过测量在高入射能量下的总反应横截面的增强来确定侵入者轨道开始占据的倒置岛的边缘。讨论了通过测量总反应横截面来限制六二铁变形的可能性。
A systematic analysis of nuclear deformation is made for neutron-rich Ti, Cr, and Fe isotopes to explore the nuclear structure in the island of inversion near N = 40, where strong nuclear deformation is predicted. The nuclear ground states are obtained by the Skyrme Hartree-Fock method in three-dimensional coordinate space, which properly describes any nuclear shape. Three types of Skyrme interactions are employed to generate various deformed states in its isotopic chain. We find that in the island of inversion the occupation of highly elongated intruder orbits induces not only large quadrupole deformation but also large hexadecapole deformation. This appears as a sizable enhancement of the nuclear matter radius, showing the characteristic shell effect of the density profile near the nuclear surface. We show that the edge of the island of inversion, where the intruder orbit starts being occupied, can be determined by measuring the enhancement of the total reaction cross section at high incident energy. The possibility of constraining the hexadecapole deformation by a measurement of the total reaction cross sections is discussed.
