We present coupled-cluster computations of nuclei with neutron number $N=50$ "south" of $^{78}$Ni using nucleon-nucleon and three-nucleon forces from chiral effective field theory. We find an erosion of the magic number $N=50$ toward $^{70}$Ca manifesting itself by an onset of deformation and increased complexity in the ground states. For $^{78}$Ni, we predict a low-lying rotational band consistent with recent data, which up until now has been a challenge for ab initio nuclear models. Ground states are deformed in $^{76}$Fe, $^{74}$Cr, and $^{72}$Ti, although the spherical states are too close in energy to unambiguously identify the shape of the ground state within the uncertainty estimates. In $^{70}$Ca, the potential energy landscape from quadrupole-constrained Hartree-Fock computations flattens, and the deformation becomes less rigid. We also compute the low-lying spectra and $B({\rm E2})$ values for these neutron-rich $N=50$ nuclei.
Ab Initio Calculations of the Carbon and Oxygen Isotopes: Energies, Correlations, and Superfluid Pairing
Institute for Basic Science(韩国基础科学研究所);Korea Institute of Science and Technology Information(韩国科学技术信息研究所);Gaziantep Islam Science and Technology University(加济安泰普伊斯兰科学与技术大学);King Fahd University of Petroleum and Minerals (KFUPM)(法赫德国王石油与矿产大学);Michigan State University(密歇根州立大学);Universitat Bonn(波恩大学);Institute for Advanced Simulation (IAS-4)(先进模拟研究所 (IAS-4));Beihang University(北京航空航天大学)
Impact of ab initio E1 strength on neutron capture rates along the nickel isotopic chain
Facility for Rare Isotope Beams, Michigan State University(稀有同位素束设施,密歇根州立大学);Physics Division, Oak Ridge National Laboratory(橡树岭国家实验室物理部);Department of Physics, Chalmers University of Technology(查尔姆斯理工大学物理系)
Ab initio calculations of beta-decay half-lives for $N=50$ neutron-rich nuclei
Technische Universität Darmstadt(达姆施塔特工业大学);ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH(极端物质研究所(EMMI),GSI亥姆霍兹重离子研究中心有限公司);Max-Planck-Institut für Kernphysik(马克斯·普朗克核物理研究所);Center for Computational Sciences, University of Tsukuba(筑波大学计算科学中心)
Ab initio Green's function theory of superfluid neutron matter
Johannes Gutenberg-Universität Mainz(美因茨约翰内斯·古腾堡大学);Institut für Kernphysik(核物理研究所);PRISMA++ Cluster of Excellence(PRISMA++卓越集群);Università degli Studi di Milano(米兰大学);Dipartimento di Fisica “Aldo Pontremoli”(阿尔多·蓬特莫利物理系);INFN, Sezione di Milano(意大利国家核物理研究所米兰分部)
High-precision ab initio calculations of nuclear binding energies: Tin isotopes from dripline to dripline
Technische Universität Darmstadt(达姆施塔特工业大学);ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI重离子研究中心极端物质研究所EMMI);KU Leuven, Instituut voor Kern- en Stralingsfysica(荷语鲁汶大学核与辐射物理研究所);Institut d’Astronomie et d’Astrophysique, Université Libre de Bruxelles(布鲁塞尔自由大学天体物理学与天文学研究所);Brussels Laboratory of the Universe – BLU-ULB(布鲁塞尔宇宙实验室);IRFU, CEA, Université Paris-Saclay(巴黎萨克雷大学CEA IRFU);Max-Planck-Institut für Kernphysik(马克斯·普朗克核物理研究所)
Multi-neutron correlations in light nuclei via ab-initio lattice simulations
Forschungszentrum Jülich(于利希研究中心);King Fahd University of Petroleum and Minerals (KFUPM)(法赫德国王石油与矿物大学);Gaziantep Islam Science and Technology University(加济安泰普伊斯兰科学与技术大学);Universität Bonn(波恩大学);Beihang University(北京航空航天大学)
本文提出了一种新的蒙特卡罗方法--针孔迹算法,用于核系统热力学的{ \it ab initio}计算。对于感兴趣的典型模拟,相对于常规巨正则系综计算的计算加速可以大到一千倍。使用领先的有效相互作用,再现了许多原子核和中子物质的属性,以百分之几的精度,我们确定的位置的临界点和液-气共存线对称核物质具有相同数量的质子和中子。我们还提出了第一个{ \it ab initio}研究的密度和温度依赖的核团簇。
Ab initio study of the halo structure in $^{11}$Be
Beihang University(北京航空航天大学);King Fahd University of Petroleum and Minerals (KFUPM)(法赫德国王石油与矿产大学);Gaziantep Islam Science and Technology University(加济安特普伊斯兰科学与技术大学);Universität Bonn(波恩大学);Michigan State University(密歇根州立大学);Forschungszentrum Jülich(于利希研究中心);Nankai University(南开大学)
New ab initio constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: II. Thermal response in the suprasaturation density domain
National Institute for Physics and Nuclear Engineering (IFIN-HH)(核物理与核工程国家研究所)
New {\em ab initio} constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: I. Subsaturation density domain
Deformation effects on reaction observables of beryllium nuclei from ab initio densities
School of Physics, Beihang University(北京航空航天大学物理学院);Peng Huanwu Collaborative Center for Research and Education, International Institute for Interdisciplinary and Frontiers, Beihang University(北京航空航天大学交叉前沿国际研究院彭桓武研究中心);Institute for Advanced Simulation (IAS-4), Forschungszentrum Jülich(于利希研究中心先进模拟研究所(IAS-4))
r-Process Nucleosynthesis With Ab Initio Nuclear Masses Around The N=82 Shell Closure
Technische Universität Darmstadt(达姆施塔特工业大学);Center for Computational Sciences, University of Tsukuba(筑波大学计算科学中心);ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI重离子研究中心极端物质研究所EMMI);Max-Planck-Institut für Kernphysik(马克斯·普朗克核物理研究所)
$^6$He structure from semiclassical 3D models based on $\textit{ab initio}$ spatial correlations
Iowa State University(爱荷华州立大学);Instituto Tecnológico de Aeronáutica(航空技术学院);Henan University of Science and Technology(河南科技大学);Chinese Academy of Sciences(中国科学院)