分类: 物理学 >> 核物理学 提交时间: 2023-07-08
摘要: The HIRFL-CSR external-target experiment (CEE) under construction is expected to provide novel opportunities to the studies of the thermodynamic properties, namely the equation of state of nuclear matter (nEOS) with heavy ion collisions at a few hundreds MeV/u beam energies. Based on Geant 4 packages, the fast simulations of the detector responses to the collision events generated using transport model are conducted. The overall performance of CEE, including spatial resolution of hits, momentum resolution of tracks and particle identification ability has been investigated. Various observables proposed to probe the nEOS, such as the production of light clusters, $\rm t/^3He$ yield ratio, the radial flow, $\pi^{-}/\pi^{+}$ yield ratio and the neutral kaon yields, have been reconstructed. The feasibility of studying nEOS beyond the saturation density via the aforementioned observables to be measured with CEE has been demonstrated.
分类: 物理学 >> 核物理学 提交时间: 2022-01-07
摘要: 在改进的量子分子动力学模型框架下,研究了高能氘核在重靶核作用下的碎裂过程,尤其近零度角产生的中子。模拟重现了 102 MeV d+C 反应中实验测量的中子双微分截面。根据模型与实验结果的一致性,论证了通过氘核在碳靶上碎裂而产生高能中子束的可行性。但因氘核内部核子的费米运动,使得包含实验室0°在内的中子能量具有相当大的能量展宽。基于模型计算,通过测量氘核碎裂过程中出射的伴随质子,出射中子能量可约束在5%(1σ)以内。进一步,本工作论证了基于伴随质子测量的单能高能中子束产生的可行性。