搜索结果: 1-15 共查到“知识库 轻粒子核物理学”相关记录118条 . 查询时间(3.484 秒)
中国科学院近代物理研究所合成新核素钍-207并发现α衰变能的奇偶效应（图）
核素 钍-207 α衰变能 奇偶效应
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2023/2/20
近日，中国科学院近代物理研究所的科研人员与合作者合成了新核素钍-207，并发现了Z>82, N<126核区α衰变能的奇偶效应，相关成果以Letter的形式于5月19日发表在Physical Review C上。
中外科研人员利用日本R3储存环获得首个重要物理成果（图）
日本 R3储存环 稀少放射性核素储存环 丰中子核素 钯-123
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2023/2/20
近日，中国科学院近代物理研究所的科研人员及合作者利用日本稀少放射性核素储存环（Rare-RI Ring, R3），成功测量了短寿命丰中子核素钯-123的质量，并研究了新的质量结果对快中子俘获过程（R-过程）元素丰度的影响。这是基于R3储存环得到的第一个重要的物理成果，于4月15日发表在Physical Review Letters上。
《物理学报》|缪子多模态成像图像质量分析
宇宙线缪子 缪子多模态成像 图像质量
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2022/3/23
缪子多模态成像有效利用了宇宙线缪子与材料相互作用产生的散射信息以及产生次级诱发中子的缪子信息。为对缪子多模态成像图像质量进行分析，基于GEANT4程序设置了探测模型，从缪子多重库仑散射模块和缪子诱发中子模块两部分对探测模型可靠性进行了验证，开发了缪子多模态成像模拟程序，得到了重建图像。成像12h可达到4mm的空间分辨率，成像时间在小时量级可清晰分辨边长10cm的235U立方体和其他常见的高、中、低...
基于太赫兹脉冲加速及扫描电子束的高时间分辨探测器
条纹相机 太赫兹 时间分辨
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2022/4/1
与传统条纹相机加速和偏转电子束的方法相比，太赫兹强场的加速梯度和扫描偏转梯度有明显优势，具备实现飞秒级超高时间分辨的能力。本文基于这一新技术设计了一款基于太赫兹场操控电子束的超小型高时间分辨探测器。从理论上分析了加速区的时间弥散与电子脉冲发射时刻以及初始时间弥散的关系，并讨论了空间电荷效应对时间弥散的影响；设计并优化了加速区和偏转区的太赫兹脉冲耦合增强装置，太赫兹脉冲电场在该装置中的增强系数最高可...
清华大学物理系研究团队提出用致密椭圆双星系统探测超轻玻色子的新方法（图）
致密椭圆双星系统 超轻玻色子 暗物质 切连科夫辐射 “超辐射”效应
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2022/4/22
许多超出粒子物理标准模型的新物理理论都预言存在一类超轻玻色子，如轴子、类轴子、暗光子等。这类粒子有可能是暗物质的主要成分，其质量比电子质量小十到二十多个数量级，且与已知基本粒子的相互作用极弱，因而很难通过现有粒子物理实验手段直接探测。另一方面，这类粒子与普通物质一样参与万有引力作用，因此，包括黑洞和脉冲星在内的强引力致密天体是产生和探测这类粒子的理想系统。
The self-consistent general relativistic solution for a system of degenerate neutrons, protons and electrons in beta-equilibrium
Neutron Star Electrodynamics General Relativistic Thomas-Fermi treatment
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2011/7/21
We present the self-consistent treatment of the simplest, nontrivial, self-gravitating system of degenerate neutrons, protons and electrons in $\beta$-equilibrium within relativistic quantum statistic...
Longitudinal Scaling of Elliptic Flow in Landau Hydrodynamics
Landau Hydrodynamics Longitudinal Scaling of Elliptic Flow
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2011/7/21
This study presents generalization of the Landau hydrodynamic solution for multiparticle production applied to non-central relativistic heavy ion collisions.
Elliptic flow from event-by-event hydrodynamics
Elliptic flow event-by-event hydrodynamics
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2011/7/21
We present an event-by-event hydrodynamical framework which takes into account the initial density fluctuations arising from a Monte Carlo Glauber model.
Calculation of shear viscosity using Green-Kubo relations within a parton cascade
Calculation of shear viscosity Green-Kubo relations
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2011/7/21
The shear viscosity of a gluon gas is calculated using the Green-Kubo relation. Time correlations of the energy-momentum tensor in thermal equilibrium are extracted from microscopic simulations using ...
Extraction of shear viscosity in stationary states of relativistic particle systems
relativistic particle systems stationary states Extraction of shear viscosity
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2011/7/21
Starting from a classical picture of shear viscosity we construct a stationary velocity gradient in a microscopic parton cascade. Employing the Navier-Stokes ansatz we extract the shear viscosity coef...
Towards thermodynamics of the quark quasi-particles
Towards thermodynamics quark quasi-particles
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2011/7/21
Some features of hot and dense gas of quarks which are considered as the quasi-particles of the model Hamiltonian with four-fermion interaction are studied.
Pseudorapidity distributions of produced charged hadrons in pp collisions at RHIC and LHC energies
produced charged hadrons RHIC LHC energies
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2011/7/21
The energy dependence of charged-hadron production in proton-proton collisions at RHIC and LHC energies is investigated in a nonequilibrium-statistical relativistic diffusion model (RDM) with three so...
Electromagnetic signatures of a strongly coupled anisotropic plasma
anisotropic plasma strongly coupled
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2011/7/21
In heavy-ion collisions, quark-gluon plasma is likely to be produced with sizable initial pressure anisotropy, which may leave an imprint on electromagnetic observables.
Probing the QCD Critical Point with Higher Moments of Net-proton Multiplicity Distributions
Net-proton Multiplicity Distributions QCD Critical Point
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2011/7/21
Higher moments of event-by-event net-proton multiplicity distributions are applied to search for the QCD critical point in the heavy ion collisions. It has been demonstrated that higher moments as wel...
Plasma damping effects on the radiative energy loss of relativistic particles
Landau-Pomeranchuk-Migdal effect Ter-Mikaelian effect radiative energy loss
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2011/7/21
The energy loss of a relativistic charge undergoing multiple scatterings while traversing an infinite, polarizable and absorptive plasma is investigated.