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相关论文: Extract neutron-neutron interaction strength and s…

200 篇论文

Heavy-ion collisions provide a unique opportunity to explore nucleon-hyperon (N-Y) interactions through two-particle correlations. The $p-\Lambda$ and $d-\Lambda$ correlations shed light on both N-Y two-body and N-N-Y three-body…

核实验 · 物理学 2024-01-02 Yu Hu

Motivated by the historical detection of gravitational waves from GW170817, the neutron star and the neutron drop, i.e., a certain number of neutrons confined in an external field, are systematically investigated by ab initio calculations…

核理论 · 物理学 2020-03-18 Hui Tong , Peng-Wei Zhao , Jie Meng

The production of fast neutrons (1 MeV - 1 GeV) in high energy muon-nucleus interactions is poorly understood, yet it is fundamental to the understanding of the background in many underground experiments. The aim of the present experiment…

高能物理 - 实验 · 物理学 2015-06-25 V. Chazal , F. Boehm , B. Cook , H. Henrikson , G. Jonkmans , A. Paic , N. Mascarenhas , P. Vogel , J. -L. Vuilleumier

We discuss the possibility to extract the neutron-neutron scattering length a_{nn} from experimental spectra on the reaction gamma d --> pi^+ nn. The transition operator is calculated to high accuracy from chiral perturbation theory. We…

核理论 · 物理学 2008-11-26 V. Lensky , V. Baru , E. Epelbaum , C. Hanhart , J. Haidenbauer , A. Kudryavtsev , Ulf-G. Meißner

Faddeev calculations of low-energy $\Lambda$-deuteron elastic scattering are performed up to $E_{cm}=20$ MeV across the deuteron threshold. Phase shifts of the $s$-wave with $J=1/2$ and $J=3/2$ are calculated using strangeness $S=-1$…

核理论 · 物理学 2024-10-22 M. Kohno , H. Kamada

We extend a recent chiral approach to nuclear matter by including the most general (momentum-independent) NN-contact interaction. Iterating this two-parameter contact-vertex with itself and with one-pion exchange the emerging energy per…

核理论 · 物理学 2009-11-10 S. Fritsch , N. Kaiser

We report results from an experiment measuring the semi-inclusive reaction $d(e,e'p_s)$ where the proton $p_s$ is moving at a large angle relative to the momentum transfer. If we assume that the proton was a spectator to the reaction taking…

核实验 · 物理学 2019-08-14 A. V. Klimenko , S. E. Kuhn

The large imbalance in the neutron and proton densities in very neutron rich systems increases the nuclear symmetry energy so that it governs many aspects of neutron stars and their mergers. Extracting the density dependence of the symmetry…

核理论 · 物理学 2022-06-01 W. G. Lynch , M. B. Tsang

The response of a NE-213 liquid-scintillator detector has been measured using tagged neutrons from 2--6 MeV originating from an Am/Be neutron source. The neutron energies were determined using the time-of-flight technique. Pulse-shape…

Background: Nuclear short-range correlations (SRCs) are corrections to mean-field wave functions connected with the short-distance behavior of the nucleon-nucleon interaction. These SRCs provide corrections to lepton- nucleus cross sections…

The model suggested by Love and Franey for description of the nucleon-nucleon interaction was used as the base. The new fitting of the model parameters was done in the energy range from 100 MeV up to 1100 MeV. It is based on the modern…

核理论 · 物理学 2008-05-21 N. B. Ladygina

The density and temperature dependence of nucleonic single particle spectral function in symmetric nuclear matter at finite temperatures and densities beyond normal nuclear matter density is investigated in a model emphasizing short-range…

核理论 · 物理学 2009-11-10 Frank Froemel , Horst Lenske , Ulrich Mosel

We present model results for the two-halo-neutron correlation functions, $C_{nn}$, for the dissociation process of light exotic nuclei modelled as two neutrons and a core. A minimum is predicted for $C_{nn}$ as a function of the relative…

核理论 · 物理学 2009-11-11 M. T. Yamashita , T. Frederico , Lauro Tomio

Neutron scattering is a powerful probe of strongly correlated systems. It can directly detect common phenomena such as magnetic order, and can be used to determine the coupling between magnetic moments through measurements of the spin-wave…

强关联电子 · 物理学 2014-10-02 Igor A. Zaliznyak , John M. Tranquada

The utilization of spin-echo small angle neutron scattering (SESANS) for the analysis of structures in soft matter is becoming increasingly prevalent. In this context, the Gaussian chain model and the corresponding framework for calculating…

化学物理 · 物理学 2023-05-26 Tengfei Cui , Xiangqiang Chu

In this article, a detailed investigation has been done for the long lived gamma activity due to neutron emitting experiments. These calculations mainly focused on the experiments used for energy calibration purposes. Calibrated energy is…

核实验 · 物理学 2022-03-07 Tanmoy Bar , Dipali Basak , Sukhendu Saha , Lalit Kumar Sahoo , Chinmay Basu

We evaluate for the first time the $\eta^\prime p$ femtoscopic correlation function to study the $\eta^\prime N$ interaction. We find it extremely sensitive to the value of the $\eta^\prime p$ scattering length, for which at present there…

核理论 · 物理学 2025-11-18 Natsumi Ikeno

It is well known that two fission fragments (FF's) are emitted essentially back to back in the laboratory frame. That can be used widely in many applications as a unique signature of fissionable materials. However, such fission fragments…

核实验 · 物理学 2019-07-12 Roman V. Shapovalov

The first measurement of the dependence of $\gamma\gamma$ $\to$ $\mu^{+}\mu^{-}$ production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead…

高能物理 - 实验 · 物理学 2021-09-29 CMS Collaboration

We utilize the generalized contact formalism in conjunction with the Woods-Saxon mean-field description of the long-range part of the nuclear wave function to assess the relative prevalence of short-range correlation pairs within atomic…

核理论 · 物理学 2024-07-23 Raz Yankovich , Ehoud Pazy , Nir Barnea