论文标题
影响参数的高能量Deuteron-Nucleus碰撞的描述
Impact-Parameter Description of High-Energy Deuteron-Nucleus Collisions
论文作者
论文摘要
在高能衍射近似中，使用杜特龙与核的碰撞的影响参数描述的理论分析。它用于获得弹性散射的强度和集成的横截面，用于从碰撞中出现两个入射核，无论它们是弹性散射的杜特龙还是两个未结合的核子，以及衍射诱导的迪特龙分离为自由中子和自由质子的衍射分离。碰撞的横截面，其中一个或两个核子被以中子核和质子核有效相移的总和来得出。是否吸收了质子（或质子）的质子（或中子）的过程的横截面表达式，而对于中子（或质子）吸收的过程的横截面，质子（或质子）被吸收并且质子（或中子）保持游离的过程。引入了两粒子密度基质的还原形式，以直接得出两粒子吸收的横截面表达式，其中质子和中子都被吸收，横截面以吸收质子（或中子）的剥离过程，其中中子（或中子（或proton）作为免费粒子出现。还得出了杜特隆分裂的横截面的表达和一个或两个自由核的产生。以经典术语（主要是径向脉冲的径向衍生物）以近似的半定量基础来理解氘核诱导的衍射解离的机制，从而使核电位（超过“半径”，“表面”接近“表面”）的估计值趋于估计。
A theoretical analysis using an impact-parameter description of the collisions of deuterons with nuclei is carried out in the high-energy diffraction approximation. It is used to obtain the intensities and integrated cross sections for elastic scattering, for the emergence of the two incident nucleons from the collision whether they appear as an elastically scattered deuteron or as two unbound nucleons, and for the diffraction-induced dissociation of the deuteron into a free neutron and a free proton, as well as the total cross section. The cross section for collisions in which one or both of the nucleons is absorbed is derived in terms of the sum of the neutron-nucleus and proton-nucleus effective phase shifts. Expressions for the cross section for processes in which the proton (or neutron) is absorbed whether the neutron (or proton) is absorbed or not, and for the cross section for processes in which the neutron (or proton) is absorbed and the proton (or neutron) remains free are derived. A reduced form of a two-particle density matrix is introduced to directly derive expressions for the cross section for two-particle absorption in which both the proton and neutron are absorbed and for the cross section for stripping processes in which the proton (or neutron) is absorbed and the neutron (or proton) emerges as a free particle. The expression for the cross section for the breakup of the deuteron and the resulting emergence of one or two free nucleons is also derived. The mechanism by which the diffraction dissociation of the deuteron is induced is understood in an approximate semi-quantitative basis in classical terms (primarily the radial derivative of the radial impulse), allowing an estimate of where in the nuclear potential (beyond the "radius", near the "surface") the dissociation process tends to predominantly occur.
