Properties of proto-neutron star and effect of three-body forces

Within the Brueckner-Hartree-Fock framework, the equation of state and the properties of newborn neutron stars are investigated by adopting a realistic nucleon-nucleon interaction AV(18) supplemented with a microscopic three-body force or a phenomenological three-body force. The maximum mass of newborn neutron star and the proton fraction in the newborn beta-stable neutron-star matter are calculated. The neutrino-trapping and the three-body force effects are discussed, and the interplay between the effects of the trapped neutrino and the three-body force are especially explored. It is shown that neutrino trapping considerably affects the proton abundance and the equation of state of the newborn neutron star in both cases with and without the three-body forces. The effect of neutrino trapping remarkably enhances the proton abundance, and the contribution of the three-body force makes the equation of state of the newborn neutron star much stiffer at high densities and consequently increases the proton abundance strongly. The trapped neutrinos significantly reduce the influence of the three-body force on the proton abundance in newborn neutron stars.

两种催化裂化催化剂载体的矿物学特性研究－高岭土和酸活化水黑云母

通过对贵州大方高岭土（GZK-1）、苏州高岭土（JSK）、新疆伊宁高岭土（XJK-6）和新疆尉犁水黑云母及其酸活化处理样矿物学特征的系统研究，得出如下讨论：（1）GZK-1、JSK、和XJK-6的微活指数依次为 29%, 13%和0%，在微活指数上埃洛石＞高岭石＞地开石；（2）高岭土的微活指数仅与杂质铁(Fe_2O_3+FeO)的含量有一定的正相关关系；（3）高岭土的微活指数与其孔体积和比表面积有正相关关系；（4）高岭土的微活指数主要与矿物成分有关，其结构羟基的特性是活性的根源；（5）XJK-6的比表面积小(9 m~2/g)、孔体积小(0.026 ml/g)、大孔多、热稳定性好、几乎无活性；（6）在一定的实验条件下，可获得即具大的比表面积、孔径和孔体积，又尽可能保持原有晶体结构的酸活化产物；（7）活化样品中K_2O、Fe_2O_3、MgO的含量可指示其比表面积的变化；（8）水黑云母含金云母晶层的矿物晶体结构决定了其比蛭石晶层耐酸腐蚀，在较为苛刻的条件下金云母晶层仍然保持；（9）酸活化产物的特点：结构中含一定量的镁；Na_2O含量低，K_2O的含量高；比表面积大(130 m~2/g)；孔体积高(0.119 ml/g)，中孔多；微活指数低 (4.7%).