基于形变相对论连续谱Hartree-Bogoliubov理论构建高精度原子核质量表  

Towards a high-precision nuclear mass table with deformed relativistic Hartree-Bogoliubov theory in continuum

作　　者：张开元 潘琮 张双全[1] 孟杰[1] Kaiyuan Zhang;Cong Pan;Shuangquan Zhang;Jie Meng(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院,核物理与核技术国家重点实验室,北京100871

出　　处：《科学通报》2021年第27期3561-3569,共9页Chinese Science Bulletin

基　　金：国家重点研发计划(2018YFA0404400,2017YFE0116700);国家自然科学基金(11935003,11875075,11975031,12070131001);北京大学核物理与核技术国家重点实验室项目(NPT2020ZZ01)资助。

摘　　要：质量是原子核最基本的物理量之一,是理解核子间相互作用、揭示壳结构演化和确定滴线位置的关键,是研究核反应和核衰变的基本信息,同时也是探索元素起源等问题必需的核物理输入量,对粒子物理与核物理、天体物理和宇宙学等学科至关重要.尽管短寿命原子核质量的测量工作已经取得很大进展,但是在可预见的将来,大部分远离稳定谷的奇特原子核质量仍依赖理论模型预言和计算.本文介绍了原子核质量模型的重要发展历程、相对论密度泛函理论描述原子核现象的成功、基于相对论连续谱Hartree-Bogoliubov理论构建的目前唯一考虑连续谱效应的原子核质量表,以及拟基于形变相对论连续谱Hartree-Bogoliubov理论建立高精度原子核质量表的最新进展和展望.As one of the most fundamental quantities for the atomic nucleus,nuclear mass is very important for various fields such as nuclear physics,particle physics,astrophysics,and cosmology.It is the key to understand the interaction between nucleons,the evolution of shell structures,and the location of drip lines.It also provides the basic information for nuclear reactions and the necessary inputs to study the origin of elements.Although dramatic progress for the mass measurement of shortlived nuclei has been made,the masses of most exotic nuclei far away from the stability valley still rely on the predictions by nuclear models in the foreseeable future.The popular nuclear mass models are briefly reviewed,including the finite-range droplet model(FRDM),Weizs?ckerSkyrme 4(WS4)model,and HFB-27*model,etc.The efforts in applying the machine learning to improve the nuclear mass predictions are introduced.The relativistic density functional theory has been proved to be a powerful theory in nuclear physics by its successful description of many nuclear phenomena.The relativistic density functional theory has many attractive advantages,such as the automatic inclusion of nucleonic spin degree of freedom,explaining naturally the pseudospin symmetry in the nucleon spectrum and the spin symmetry in antinucleon spectrum,and the natural inclusion of nuclear magnetism,which plays an important role in nuclear magnetic moments and nuclear rotations.The relativistic density functional PC-PK1 has turned out to be very successful in providing good descriptions of the isospin dependence of the binding energy along either the isotopic or the isotonic chain.The relativistic continuum Hartree-Bogoliubov(RCHB)theory,which takes into account self-consistently the pairing correlations and continuum effects,is very suitable to describe the exotic nuclei.The first nuclear mass table including the continuum effects based on the RCHB theory with PC-PK1 has been constructed,predicting 9035 bound nuclei with8≤Z≤120,which remarkably extends the exist

关 键 词：原子核质量 形变 连续谱 相对论密度泛函理论 

分 类 号：O571[理学—粒子物理与原子核物理]