A5100772430- Nuclear physics research studies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Topological Materials and Phenomena
- Dark Matter and Cosmic Phenomena
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Graphene research and applications
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Magnetic properties of thin films
- Astrophysics and Cosmic Phenomena
- Atomic and Molecular Physics
- Magnetic Field Sensors Techniques
- Nuclear Materials and Properties
- Atomic and Subatomic Physics Research
- Random Matrices and Applications
- Graphite, nuclear technology, radiation studies
- 2D Materials and Applications
- Physics of Superconductivity and Magnetism
- Radioactivity and Radon Measurements
- Magnetic Properties and Applications
- Diamond and Carbon-based Materials Research
- High-Energy Particle Collisions Research
- Stochastic processes and statistical mechanics
China Institute of Atomic Energy
2005-2024
University of Regensburg
2019-2021
Yalong Hydro (China)
2013-2017
Tsinghua University
2011-2013
We report the WIMP dark matter search results using first physics-run data of PandaX-II 500 kg liquid xenon dual-phase time-projection chamber, operating at China JinPing Underground Laboratory. No candidate is identified above background. In combination with set during commissioning run, a total exposure 3.3$\times10^4$ kg-day,the most stringent limit to spin-independent interaction between ordinary and for range mass 3.5 1000 GeV/c$^2$. The best upper on scattering cross section found...
We report new searches for solar axions and galactic axionlike dark matter particles, using the first low-background data from PandaX-II experiment at China Jinping Underground Laboratory, corresponding to a total exposure of about 2.7×104 kg day. No axion or particle candidate has been identified. The upper limit on axion-electron coupling (gAe) flux is found be 4.35×10−12 in mass range 10−5 1 keV/c2 with 90% confidence level, similar recent LUX result. also best Fe57 deexcitation. On other...
China JinPing underground Laboratory (CJPL) is the deepest laboratory presently running in world. In such a deep laboratory, cosmic ray flux very important and necessary parameter for rare event experiments. A plastic scintillator telescope system has been set up to measure flux. The performance of studied using on ground near CJPL. Based experimental data taken from November 2010 December 2011 CJPL, which effective live time 171 days, muon CJPL measured be (2.0+-0.4)*10^(-10)/(cm^2)/(s)....
The influence of the spin cut-off parameter on isomeric cross-section ratio $(n,2n)$ reaction is studied within Huizenga-Vandenbosch method, in which neutron transmission coefficient evaluated from optical model, and treated for residual nucleus following first emission $({\ensuremath{\sigma}}_{1})$ that second $({\ensuremath{\sigma}}_{2})$ separately. It found definitely sensitive to parameters, especially ${\ensuremath{\sigma}}_{2}$. Moreover, various formulas parameters are compared...
We have investigated a diode-assisted GaAs based magnetoresistance (MR) effect at room temperature. It is found that the introduction of diode effectively enhanced MR device, and increases with increasing length/width ratio device. The can be achieved to about 2600% 1.2 T high sense ability 44% 0.06 an extremely low energy consumption sub-micro Watt. This work may open new way for practical application semiconductor magnetic sensing industry.
BiSbTeSe$_2$ is a 3D topological insulator (3D-TI) with Dirac type surface states and low bulk carrier density, as donors acceptors compensate each other. Dominating temperature transport in this material heralded by Shubnikov-de Haas oscillations the quantum Hall effect. Here, we experimentally probe model electronic density of (DOS) thin layers capacitance experiments both without quantizing magnetic fields. By probing lowest Landau levels, show that large fraction electrons filled via...
Based on the light nucleus reaction model (Nucl. Sci. Eng. 133 (1999) 218), four aspects (neutron incident energy region, channel analysis, renewed level schemes and optical parameters) of n+12C are improved to calculate total outgoing neutron double-differential cross sections with modified LUNF code below 30 MeV. The calculated results agree fairly well experimental data at En = 14.1 MeV 18 analysis shows that pre-equilibrium mechanism, which is exactly considered conservation energy,...
By using a new reaction model for light nuclei, the double-differential cross section of total outgoing neutron with LUNF code n + 16O reactions at En = 14.1 MeV and 18 have been calculated analyzed. In this paper opened channels, which contribution to emitting neutrons, are listed in detail. To improve fitting results direct inelastic scattering mechanism is involved. The calculating agree fairly well experimental data deviation from low energy region has Since possibility 5He affirmed...
The chiral phase transition in QCD can be supercooled the thermal history of universe to instantaneously out-of equilibrium, if is coupled a dark sector exhibiting first order. In that case sigma meson field (as order parameter, or light quark condensate) starts roll nonadiabatic way down true vacuum. Meanwhile dynamic baryonic chemical potential generated solely within QCD, which governed by motion field, analogously spontaneous baryogenesis leptogenesis via Higgs axionlike relaxation...
We conducted mobility spectrum analysis on a high quality three dimensional topological insulator film of BiSbTeSe2 to extract μ and carrier density n. Top bottom gates were applied tune the top surfaces independently. At 1.5 K, when conduction is entirely dominated by Dirac surface states, we always find two dominant channels (top surfaces), with μ=500–3000 cm2/(V s) n order 1012 cm−2. However, at sufficiently temperature (T=85 K), bulk contributes, third channel maximum ∼ 400 1011–1013...
Due to the complex structures associated with neutron resonance cross sections, their accurate evaluation has received considerable attention in field of nuclear data research. The traditional R-matrix method still faces some difficulties evaluating data, especially briefly reproducing high-frequency oscillating sections. Recently, applications machine learning methods physics have been expanding. In this paper, a novel Phase Shift Deep Neural Network (PSDNN) method, which not only overcomes...
The excitation function of the 186W(d,2n)186Re reaction was evaluated and thick target yield (TTY) therapeutic radioisotope 186Re calculated. available experimental data from EXFOR library literature were analyzed corrected with g-ray branching ratio, radioactive decay constant standard cross sections. recommended below 50 MeV on basis least-squares fit polynomial theoretical calculation TALYS code. TTY calculated using reaction.
Abstract The structural effect is believed to have no influence on the decay properties of medium and heavy-mass nuclei at excitation energies above pairing gap. These can be described by statistical using so-called photon strength functions for different multipolarities, directly related photoabsorption cross-section ( ). dominated electric giant dipole resonance energy MeV. In this study, we construct two kinds systematic parameters fitting experimental cross-sections. One based...
Capacitance‐voltage ( C – V ) traces in n‐type‐(Bi 1‐ x Sb 2 Te 3 /oxide/metal capacitor structures using an AC capacitance bridge are investigated. By tuning the top gate voltage tg from positive to negative values, system at interface is tuned accumulation, via depletion into inversion. The results show typical low‐frequency and high frequency traces, depending on measuring frequency, temperature, illumination intensity reflecting their sensitive dependence recombination/generation rates....
NDPlot is an efficient plotting tool for nuclear data. It not only a tool, but also integrated application system. The first beta version of was released in October 2018. current 0.94 beta. can plot experimental and evaluated data reaction cross sections, angular distributions secondary particles, energy particles product energy-angle etc. provides processing functions such as curve summation capability to meet user’s requirements.
A new value for the emission probability of 137.144keV g-ray 186gRe decay are re-recommended to be 9.47+-0.03 (%). From this probability, measured cross sections 187Re(n,2n)186mRe and 187Re(n,2n)186gRe reactions around 14MeV evaluated, total section 187Re(n,2n)186m+gRe reaction at 14.8MeV is recommended 2213+-116 mb. The UNF code adopted calculate below 20 MeV fitting mb using a set optimum neutron optical potential parameters which obtained on relevant experimental data Re. Then isomeric...
R-matrix theory is an important methodology for applications on light, medium and heavy mass nuclides nuclear reaction in the resonance energy range. Full formalism contains diagonal elements of levels matrix it a rigorous theory. Because different assumptions approximations, many kinds derived methods are obtained. The new code FDRR presented includes 4 applications. It can be used calculating integral cross sections angular distributions 2-bodies reactions. n+ 6Li calculated analyzed by...
In Iwamoto–Harada model the whole phase space is full of fermions. When momentum distributions exciton states are taken into account, pre-formation probability light composite particles could be improved, and state-dependent has been proposed. The calculated results indicate that consideration distribution enhances [1,m] configuration, suppresses [l>1,m] configurations seriously.
The parameterized theoretical formulae of excitation functions for ( n , 2 ) and n, γ reactions have been established, n,tot ), n,non ,3 n,p n,d n,t 3 He n,α recommended. According to these formulae, the SEF code developed systematics calculation reactions. calculated results with corresponding discretional nucleus can be provided by in applied range quickly. At same time, comparison experimental evaluated data given graphically.