【摘 要】
：
Nuclear deformations are fundamentally important in nuclear physics.We recently developed a multidimensionally constrained relativistic Hartree-Bogoliubov (MDCRHB) model,in which all multipole deformations respecting the V4 symmetry can be considered self
【机 构】
：
CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Scienc
论文部分内容阅读
Nuclear deformations are fundamentally important in nuclear physics.We recently developed a multidimensionally constrained relativistic Hartree-Bogoliubov (MDCRHB) model,in which all multipole deformations respecting the V4 symmetry can be considered self-consistently.In this work we extend this model by incorporating the angular momentum projection and parity projection to restore the rotational and parity symmetries broken in the mean-field level.This projected MDCRHB(p-MDCRHB) model enables us to connect certain nuclear spectra to exotic intrinsic shapes such as triangles or tetrahedrons.We present the details of the method and an exemplary calculation for 12C.We develop a triangular moment constraint to generate the triangular configurations consisting of three α clusters anranged as an equilateral triangle.The resulting 12C spectra are consistent with that from a triangular rigid rotor for large separations between the α clusters.We also calculate the B(E2)and B(E3) values for low-lying states and find good agreement with the experiments.
其他文献
基于单颗粒物气溶胶质谱仪(SPAMS)分析兰州市四季的大气细颗粒物(PM2.5)粒径分布及化学组分的在线连续监测数据,获取并分析具有正、负离子质谱信息的颗粒物共1148062个,利用基于Matlab软件的自适应共振神经网络分类算法(ART-2a),将具有正、负离子质谱信息的PM2.5按组分归为9类;根据兰州市PM2.5源谱对PM2.5进行来源解析,最终归为8类来源:扬尘、生物质燃烧、餐饮、汽车尾气、燃煤、工业工艺源、二次无机源和其他源.结果 表明,兰州市PM2.5粒径主要分布于0.2～1.2 μm,冬、春
目的 研究冰片对脂多糖(LPS)引发脑微血管内皮细胞(BMECs)损伤的保护作用及潜在机制.方法 原代培养和鉴定大鼠BMECs,并用LPS诱发炎性损伤.利用CCK-8法检测细胞的存活率,并以此优化冰片的给药剂量.继而通过ELISA检测TNF-α、IL-6和IL-8的生成,DCFH-DA探针检测ROS含量,Hoechst 33342染色检测细胞凋亡率,Western blot检测TLR4、p-p65、p65、p-IκBα和IκBα的表达.结果 冰片剂量优化结果表明其在10 mg·L-1和20 mg·L-1具
In this paper,we discuss quantum uncertainty relations of Tsallis relative α entropy coherence for a single qubit system based on three mutually unbiased bases.For α ∈[1/2,1) ∪ (1,2],the upper and lower bounds of sums of coherence are obtained.However,the
In quantum key distribution (QKD),the passive decoy-state method can simplify the intensity modulation and reduce some of side-channel information leakage and modulation errors.It is usually implemented with a heralded single-photon source.In Wang et al 2
The population transfer of sodium in a single analytical laser pulse was studied in three models:two-level sodium,three-level sodium and many-level sodium.The effect of a third state on a two-level system was studied by investigating a ladder three-level
Using an extended version of quantum hadrodynamics,I propose a new microscopic equation of state (EoS) that is able to correctly reproduce the main properties of symmetric nuclear matter at the saturation density,as well as produce massive neutron stars a
研究了气动力-安培力-受迫激励联合作用下载流新月形覆冰导线的振动特征,在传统只考虑安培力的载流导线振动方程中引入了气动力和受迫激励项,使得模型更加符合实际工程.首先建立了载流新月形覆冰输电导线模型,接着推导了载流覆冰导线模型的振动方程,利用Galerkin方法将该振动方程转变为有限维度的常微分方程,采用多尺度法进行摄动求解,求得幅-频响应函数,并对比分析主共振情况下考虑气动力与不考虑气动力时载流、间距、风速、张力、激励幅值对振动幅值的影响.研究结果表明:考虑气动力的振动幅值较未考虑气动力时小.各线路参数对
自密实混凝土的Ⅱ型断裂韧度是个很重要的材料参数,而对其Ⅱ型断裂的研究,有助于我们建立复杂裂缝扩展准则并且探索构件断裂失效.为了解自密实混凝土Ⅱ型断裂破坏过程并确定其Ⅱ型断裂韧度,本文制备了7组21个不同缝高比以及不同切口方式的试件,利用半对称加载方式对自密实混凝土做了Ⅱ型断裂实验,并利用ABAQUS有限元建模,模拟计算了各个试件的Ⅱ型断裂韧度.实验结果表明,自密实混凝土比普通混凝土粒径小,断裂脆性大,多是沿韧带剪切破坏,自由端剪切崩落.实验与模拟计算的Ⅱ型断裂韧度一致,其大小为1.95 MPa.√m.由于
本文基于四根刚臂梁结合12个外接一维单元建立了钢筋混凝土框架节点单元,单元具有5个节点15个自由度,称之为“BCJ-5N”单元.每个节点具有3个自由度,与普通梁单元一致,从而确保本单元适合于同普通一维梁柱单元一起进行钢筋混凝土结构平面非线性分析.单元考虑了梁受力钢筋在框架节点内的黏结滑移作用,并通过钢筋混凝土梁正截面强度设计建立了梁端弯矩与截面转角关系的骨架曲线,结合Lowes加载卸载模型,组成了完整的静力、动力分析的框架节点单元,并将其移植到ABAQUS通用分析平台上,通过对两跨三层钢筋混凝土框架结构的
We theoretically investigate the vortex patterns in photoelectron momentum distributions of He+driven by counter-rotating elliptically polarized,time delayed attosecond laser pulses by numerically solving the two-dimensional time-dependent Schr(o)dinger e