Observables in proton-deuteron scattering are sensitive probes of the nucleon-nucleon interaction and three-nucleon force effects. Several facilities, including the KVI, allow a detailed study of few-nucleon interactions below the pion-production threshold exploiting polarized proton and deuteron beams. In this contribution, some recent results are discussed and interpreted exploiting rigorous Faddeev calculations. Furthermore, an experimental inconsistencies between two measurements of the cross section in elastic proton-deuteron scattering at 135 MeV/nucleon is reviewed.
The broad range of accumulated experimental data on the binding energies for single-particle states in nuclei is examined as a function of the constituent number of neutrons and protons and an unexpectedly simple pattern emerges. The dependence of the energies of neutron states on the number of constituent protons, or of proton states on the number of neutrons, are very similar to each other and the sign reflects the well-known strong attraction. For the same kind of nucleons changing as in the state -- energies for neutron states with neutron number changing or proton states with protons -- t…
Contemporary presence of dynamical and statistical production of intermediate mass fragments in midperipheral $^{58}$Ni+$^{58}$Ni collisions at 30 MeV/nucleon
在INFN超导回旋加速器上对30 MeV/核子的$^{58}Ni+^{58}Ni$反应进行了实验研究。在中周边碰撞中，观察到大量碎片（4 $\le$ Z $\le$ 12）的产生，这与弹状残留物的统计碎片化和颈部的动态形成相一致，加入了弹状和靶状残留物。来自这些不同过程的碎片在电荷分布和同位素组成方面都不同。特别是，它表明，这些机制导致片段生产的行为，同时在同一事件。
Anisotropic flow can offer significant information of evolution dynamics in heavy-ion collisions. A systematic study of the directed flow $v_1$ and elliptic flow $v_2$ of hard photons and free nucleons is performed for $^{40}$Ca+$^{40}$Ca collisions in a framework of isospin dependent quantum molecular dynamics (IQMD) model. The study firstly reveals that thermal photons emitted in intermediate-energy heavy-ion collisions have the behaviors of directed and elliptic flows. The interesting phenomena of incident energy dependence of $v_1$ and $v_2$ for thermal photons in central collisions also c…
Three typical algorithms of Pauli blocking in the quantum molecular dynamics type models are investigated in the nuclear matter, the nucleus and the heavy ion collisions. The calculations in nuclear matter show that the blocking ratios obtained with the three algorithms are underestimated 13-25\% compared to the analytical values of blocking ratios. For the finite nucleus, the spurious collisions occur around the surface of the nucleus owing to the defects of Pauli blocking algorithms. In the simulations of heavy ion collisions, the uncertainty of stopping power from different Pauli blocking a…
On Parity-Violating Three-Nucleon Interactions and the Predictive Power of Few-Nucleon EFT at Very Low Energies
在“无π”有效场论中讨论了核子-氘核（等二重态）系统中强子宇称破坏的三核子相互作用的典型强度。通过分析回路图的表面发散程度，我们得出结论，在主导顺序不需要这样的相互作用。仅有的两个线性独立的宇称违反三核子结构，一个衍生物混合两个S和两个P的半波与同位旋跃迁Δ I = 0或1。由于它们的结构，它们不能吸收任何表面上出现在次领先顺序的发散。这一观察是基于在双核子系统中近似实现维格纳的SU（4）自旋-同位旋对称性，即使包括有效射程修正。因此，宇称破坏的三核子相互作用只出现在次领先阶之外。这保证了理论的重整化，而不引入新的，未知的耦合常数，并允许直接提取宇称破坏两核子相互作用的三核子实验。
Based on the Isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model, the in-medium nucleon-nucleon inelastic scattering ( which is dominated by pion production at low and intermediate energies) is explored. It is found that the in-medium modification of nucleon-nucleon inelastic scatterings appears to reduce the neutron to proton ratio n/p at higher kinetic energies. Although the in-medium modification of nucleon-nucleon inelastic scatterings, as expected, affects the value of $π^-/π^+$ ratio, considering a series of undetermined properties of delta resonance and $π$ in medium, t…
The body of experimental measurements of intermediate-energy reactions that remove a single nucleon from a secondary beam of neutron- or proton-rich nuclei continues to grow. These data have been analysed consistently using an approximate, eikonal-model treatment of the reaction dynamics combined with appropriate shell-model descriptions of the projectile initial state, the bound final states spectrum of the reaction residue and single-particle removal strengths computed from their wave-function overlaps. The systematics of the ratio $R_s$ of the measured inclusive cross-section to all bound f…
Accessing transverse nucleon and gluon distributions in heavy nuclei using coherent vector meson photoproduction at high energies in ion ultraperipheral collisions
