102Ru核振动到转动演化的微观研究

基于微观sdIBM-2方案和实验单粒子能量值, 在最普遍的哈密顿量下, 用两组不同的核子-核子等效相互作用参数, 分别很好地再现了¹⁰²Ru核的振动带能谱和转动带能谱及其演化过程. 微观和唯象的研究指认: 1) 这两种激发模式的共存区是能态8⁺₁—12⁺₁(即E_x=2.500—4.000 MeV); 态 8⁺_{1关键词：微观sdIBM-2方案形状演化玻色子102Ru核')" href="#">¹⁰²Ru核}

Evolution from vibration to rotation of 102Ru nucleus discussed within microscopic theory

Based on the microscopic sdIBM-2 approach and the single-particle energies from experiment, with the use of the most general Hamiltonian, the vibrational band and rotational band of ¹⁰²Ru nucleus as well as its evolutional process are reproduced very well by two parameters of nucleon-nucleon effective interactions, respectively. Microscopic and phenomenological study identifies that: 1) the coexisting region of two excitation models are located in the interval between the state 8⁺₁ and state 12⁺₁ (which is an interval with E_x=2.50—4.00 MeV), the 8⁺₁ state is a state predominant in the vibrational model, the 12⁺₁ state is one predominant in the rotational model, while the state 10⁺₁ is neutral relative to two models; 2) the 12⁺₁ state is a medial state decoupled from the 14⁺₁ state to the 10⁺₁ state as well released photons; 3) the yrast states from the ground-state up to the 20⁺₁ state are collective states, hereafter the first breaking up and aligning state may be a neutron two-particle-state in the intruder orbits h_11/2; 4) this structure evolution is not very furious, but achieved softly by the boson structure constant changing unobviously in the coexisting region.