搜索结果: 16-30 共查到“知识库 核能谱学”相关记录167条 . 查询时间(2.562 秒)
Starting from hyperbolic dispersion relations, we derive a system of Roy--Steiner equations for pion Compton scattering that respects analyticity, unitarity, gauge invariance, and crossing symmetry. I...
P_11 Resonance Extracted from pi-N Data and Its Stability
P_11 Resonance Extracted pi-N Data Its Stability
2011/7/21
We study the stability of resonance poles in pi-N P_11 partial wave, particularly the Roper resonance, by varying parameters significantly within the EBAC dynamical coupled-channels model, keeping a g...
$η$ photoproduction on the quasi-free nucleons in the chiral quark model
photoproduction quasi-free nucleons chiral quark model
2011/7/21
A chiral quark-model approach is adopted to study the $\eta$ photoproduction off the quasi-free neutron and proton from a deuteron target. Good descriptions of the differential cross sections, total c...
Vector Meson Production in Coherent Hadronic Interactions: An update on predictions for RHIC and LHC
Vector Meson Coherent Hadronic Interactions update RHIC LHC
2011/7/21
In this letter we update our predictions for the photoproduction of vector mesons in coherent $pp$ and $AA$ collisions at RHIC and LHC energies using the color dipole approach and the Color Glass Cond...
Leading twist nuclear shadowing phenomena in hard processes with nuclei
twist nuclear phenomena hard processes nuclei
2011/7/21
We present and discuss the theory and phenomenology of the leading twist theory of nuclear shadowing which is based on the combination of the generalization of Gribov-Glauber theory, QCD factorization...
Monte-Carlo implementations of kT -factorization formula with both KLN and running-coupling BK unintegrated gluon distributions for nucleus-nucleus collisions are used to analyze recent experimental d...
Verification of high-energy transport codes on the basis of activation data
activation data high-energy transport codes intranuclear cascade model
2011/7/20
Nuclide production cross sections measured at ITEP for the targets of nat-Cr, 56-Fe, nat-Ni, 93-Nb, 181-Ta, nat-W, nat-Pb, 209-Bi irradiated by protons with energies from 40 to 2600 MeV were used to e...
Astronomy with Radioactivities: Chapter 9, Nuclear Reactions
Astronomy Radioactivities Chapter 9 Nuclear Reactions
2011/1/7
Nuclear reaction rates determine the abundances of isotopes in stellar burning processes.A multitude of reactions determine the reaction flow pattern which is described in terms of reaction network si...
Nuclear absorption effects on Lambda-bar/p-bar ratio in heavy ion collisions
Nuclear absorption effects Lambda-bar/p-bar ratio heavy ion collisions
2011/1/6
An enhanced ¯ /¯p ratio in heavy-ion relative to p + p collisions has been proposed as one of the signatures for the Quark-Gluon Plasma (QGP) formation. A significantly large (¯ +0 +...
混合能谱超临界水堆快谱组件优化设计
超临界水堆 多层组件 优化设计
2011/8/25
本工作从热工水力和中子物理两方面对混合能谱超临界水堆混合谱堆芯的快谱区多层组件进行优化设计。对于轴向以再生区和裂变区交替布置的快谱组件，分别改变其轴向布置方式、燃料芯块直径、栅径比及外围燃料棒距组件盒最小距离，并分析它们对组件热工和物理性能的影响，从而得到较优的参数范围，尽可能提高混合谱超临界水堆的固有安全性和经济性。
Subtle Is The Manifestation Of Chiral Symmetry In Nuclei And Dense Nuclear Matter
Subtle Manifestation Of Chiral Symmetry In Nuclei Dense Nuclear Matter
2011/1/6
The history of how chiral symmetry has entered in nuclear physics, in which Gerry Brown
and I have participated from 1970 up to today, is described from my personal viewpoint. The
route of developme...
通过用两种激发模式对原子核复杂能谱的良好再现，揭示出对激发模式相变的一种新理解：由于退激发解除了原有激发模式基准态结构及其在能量上的优势，高有序基准态释放结构能，同时引发低能激发模式基准态结构的重构，实现了新旧激发模式基准态的过渡。这种以改变价核子间耦合强度方式实现的基准态过渡，是转动驱动量子相变的动力学基础，从微观上看比较温和。本工作结果得到Bohr集体模型势能曲面理论的支持，两者相得益彰。
就地γ谱仪峰谷比法测量137Cs深度分布
就地γ谱仪 137Cs 深度分布 峰谷比法
2011/8/24
研究就地γ谱仪测量地表层137Cs深度分布的峰谷比法，建立了就地γ能谱峰谷比数值计算公式和实验剥谱方法。理论计算表明，峰谷比随137Cs张弛深度的变化十分灵敏，土壤密度误差对峰谷比有一定影响，但变化不大时，对峰谷比法结果影响可忽略。野外验证实验显示，峰谷比法相对于样品实验室分析结果的最大相对偏差为31%，表明峰谷比法是可行的，所建立数值计算公式、实验剥谱方法是正确的。
Traveling Dark Solitons in Superfluid Fermi Gases
Traveling Dark Solitons Superfluid Fermi Gases
2010/11/25
Families of dark solitons exist in superfluid Fermi gases. The energy-velocity dispersion and
number of depleted particles completely determines the dynamics of dark solitons on a slowly-
varying ba...
Coherent state transfer between an electron- and nuclear spin in 15N@C60
Coherent state transfer electron- and nuclear spin
2010/11/25
Electron spin qubits in molecular systems o er high reproducibility and the ability to self assemble into larger architectures. However, interactions between neighbouring qubits are `always-on' and al...