核场论中声子重整化的初步研究

本文在声子固有自能子图取为图1(1)的情况下,写出了重整化声子的戴逊方程,得到了重整化声子的本征方程,以及声子和规则与声子权重能量和规则。     

40Ca±1核的l-禁戒M1跃迁和有效g因子

用⁴⁰Ca区域的有效g因子计算了⁴⁰Ca±1核的l-禁戒M1跃迁强度。结果解释了³⁹K,⁴¹K的异常大的l-禁戒M1跃迁强度。对³⁹K,⁴¹K和³⁹Ca,⁴¹Ca的跃迁强度的差别作了定性的解释。     

68Ge核中g9/2质子对与中子对的转动排列效应

本文利用HFB推转模型对于g9/2质子对与中子对的转动排列效应对⁶⁸Ge三分叉现象的作用进行了探讨。计算表明⁶⁸Ge三分叉中的两个回弯,主要是由于νg9/z和πg9/2转动排列的结果。     

Study of magnetic-rotation in ~(82)Rb by g-factor measurements

Magnetic rotation in ⁸²Rb has been investigated for the first time by g-factor measurement of intra-band states of the magnetic-rotational band built on the 11- state. The g-factors were measured by a TMF-IMPAD method and calculated by a semi-classical model of independent particle angular momentum coupling assumption. The g-factors and deduced shears angles decrease with the increasing of spin along the band, illustrating a step-by-step alignment of the valence protons and neutrons. The rapid alignment of the valence neutrons leads to a decrease of g-factors. The present results vividly reveal the shears mechanism of magnetic rotation.     

~(40)Ca的同位旋标量巨共振态的研究

本文从核的多体理论出发考虑了(p-1h)和2p-2h之间的耦合,计算了~(40)Ca的同位旋标量巨单极共振和巨四极共振的强度函数。计算结果可初步解释相应的实验事实。     

重核粘滞系数的微观计算

本文叙述了在线性响应理论的基础上,利用推广的尼尔逊模型,对²³⁶U核从基态到鞍点态的粘滞系数进行的实际计算。观察了粘滞张量各分量γ_δ2δ2,γ_δ4δ4,γ_δ3δ3,γ_δ2δ3,γ_δ2δ4,γ_δ3δ4在各种核温度T和能级宽度Γ下对核的集体形变坐标δ₂,δ₃,δ₄的依赖关系。提供了可以计算重核粘滞亲数的一种方法。     

自旋巨共振和核实极化效应

对于自旋巨偶极共振,本文考虑了核场（Y₀δ₁）_1v和γ²（Y₂δ₁）_1v之间的耦合项的影响,这种耦合形式可以从张量算符给出.对于λ≥2的自旋巨共振,本文考虑了核场γ^λ+1(Y_λ+1δ₁)_λv的影响.     

用福克-普朗克方程严格解裂变速率问题

本文应用数值方法严格求解二维福克-普朗克(Fokker-Planck)方程,研究在鞍点上的速度分布、坐标和速度的二次矩以及核裂变速率随时间的演变.在相当大的粘滞性范围内,研究核裂变速率与粘滞性的依赖关系,观察到在一定粘滞性下出现裂变速率极大值的现象.对计算的各种结果进行了解释。     

Structure of β-emitting nuclei 29P

The extoic structure of ²⁹P was investigated by measuring its magnetic moment in the ground state with β-NMR method. We got the experimental value of 1.2346 μ_N after diamagnetism correction. It is very close to the calculated value of 1.1009 μ_N computed with shell model. The shell model calculation also gave a proton density distribution of ²⁹P with a long tail. The present results show that 2s_1/2 proton in the ²⁹P may lead to the proton-skin structure.