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国家自然科学基金(10775183)

作品数:18 被引量:5H指数:2
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A possible proton pygmy resonance in ^(17)Ne
2011年
The low-lying electric dipole strengths in proton-rich nuclei 17F and 17Ne, which can be produced at HIRFL-CSR in Lanzhou, are investigated. In the framework of the covariant density functional theory the self-consistent relativistic Hartree Bogoliubov model and the relativistic quasiparticle random phase approximation with the NL3 parameter set and Gogny pairing interaction are adopted in the calculations. A pronounced dipole peak appears below 10 MeV in17Ne, but does not occur in 17F. The prop erties of this low-lying E1 excitation in 17Ne are studied, which may correspond to a proton pygmy resonance with different characteristics from those of giant dipole resonance.
MA ZhongYu1,2 & TIAN Yuan1 1 China Institute of Atomic Energy, Beijing 102413, China
关键词:PROTONRESONANCERELATIVISTICRELATIVISTICQUASIPARTICLEAPPROXIMATION
Systematic studies on α-decay half-lives for super heavy nuclei
2010年
Radioactive decay of super heavy nuclei via the emission of α-particles has been studied theoretically in the preformed cluster model (PCM). The nucleus-nucleus (NN) potential is obtained by double folding the density distributions of the α-particle and the daughter nucleus with a realistic effective interaction. The M3Y effective interaction, supplemented by a zero-range pseudo-potential for exchange term, is used to calculate the NN potential. The α decay half-lives for 317 nuclei at Z=102 120 are performed in the PCM framework with the theoretical Q values extracted from the MSller-Nix-Kratz and Liran-Marinov-Zeldes mass tables and are compared with the experimental data. The calculated results are also compared with those obtained by using Q values from the Muntian-Hofmann-Patyk-Sobiczewski and Myers-Swiatecki mass estimates.
张地大陈宝秋马中玉
Alpha Decay Half Lives of Super Heavy Elements in Dirac-Brueckner-Hartree-Fock Approach
Most former works evaluated the a decay half lives using the M3Y or DDM3Y nucleon-nucleon (NN) effective inter...
ZHANG Di-da
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Contributions of Currents and Coulomb Interaction to Multipole Giant Resonances in Relativistic Continuum Random Phase Approximation
The contributions of the currents and the Coulomb interaction to multipole excitations are studied in the fram...
YANG DingCAO Li-gangMA Zhong-yu
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Dirac-Brueckner-Hartree-Fock方法研究超重元素α衰变
<正>以前的一些计算α衰变半衰期的工作采用M3Y或者DDM3Y有效相互作用计算核.核势能,而且得到了合理的结果。我们在预形成结团模型框架下,尝试运用一个新的微观核核相互作用研究超重元素α衰变的半衰期。用Dirac-Bru...
张地大
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轴对称相对论Hartree-Bogoliubov对关联计算中可分离项收敛性的研究
<正>在求解可分离对相互作用的RHBZ方程时,我们把Dirac旋量在主壳N
田源马中玉Peter Ring
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Systematical Studies onαDecay Half-Lives for Superheavy Nuclei
We perform systematical evaluations of the a decay half lives for 317 nuclei in the area of Z= 102-120 in the ...
ZHANG Di-da
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可分离对相互作用在轴对称形变核中的应用
<正>我们利用可分离形式对相互作用的RHBZ方程计算Sm同位素链的基态性质。图1a给出Sm同位素链从N=66到N=102的结合能随中子数变化曲线。图1b则给出不同理论计算结果与实验值的差别随中子数变化曲线。所有的理论计算...
田源马中玉Peter Ring
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Random Phase Approximation in Relativistic Approach
2009年
Some special issues of the random phase approximation(RPA) in the relativistic approach are reviewed. A full consistency and proper treatment of coupling to the continuum are responsible for the successful application of the RPA in the description of dynamical properties of finite nuclei. The fully consistent relativistic RPA(RRPA) requires that the relativistic mean filed (RMF) wave function of the nucleus and the RRPA correlations are calculated in a same effective Lagrangian and the consistent treatment of the Dirac sea of negative energy states. The proper treatment of the single particle continuum with scattering asymptotic conditions in the RMF and RRPA is discussed. The full continuum spectrum can be described by the single particle Green's function and the relativistic continuum RPA is established. A separable form of the paring force is introduced in the relativistic quasi-particle RPA.
MA Zhong-yu1,2,YANG Ding1,TIAN Yuan1,CAO Li-gang2,3(1 China Institute of Atomic Energy,Beijing 102413,China
关键词:CONSISTENTCOUPLINGCONTINUUMPAIRINGCORRELATION
Study of Converge on Separable Terms in Axially Deformed Nuclei
We solve the Axially Deformed Relativistic Hartree-Bogoliubov(RHBZ) equation with the separable pairing force,...
TIAN YuanMA Zhong-yuPeter Ring
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