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Hadron spectroscopy from B-factories

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Chinese physics C 2010年第9期34卷 1195-1200页

作者： G.Pakhlova institute for Theoretical and experimental physics(Russia)

We review the recent experimental results on hadron spectroscopy from B-factories focusing on the exotic charmonium-like *** them we discuss the X（3872）,Y（3940）,Z（4430）＋,Z（4050）＋,Z（4250）＋ and Y（4140） states found in B-meson decays,the X（3940） and X（4160） states produced in double charmonium production,the Y（4260）,Y（4325）,Y（4660） and X（4630） states produced with initial-state radiation in e ＋ eannihilation and the X（3915）,Y（4350） states observed in two-photon collisions.

关键词： hadron spectroscopy charmonium charmonium-like states charm mesons cross section

Superheavy Particle Production in High Energy Heavy Ion Collisions

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Journal of Modern physics 2021年第4期12卷 433-439页

作者： Alexey Kurepin Department of experimental physics Institute for Nuclear Research Russian Academy of Sciences Moscow Russia

The existence of several TeV superheavy particles (SHPs) is predicted by theories beyond the Standard Model. Particles with a mass exceeding the energy in the center of mass in the collision of protons with protons can be produced in subthreshold heavy ion collisions at the LHC. The purpose of the performed research was to estimate the rate of a rare process of SHPs production. It was shown that the data on the subthreshold production of antiprotons can be explained by the phenomenological parton model. The obtained parton distribution function was used to determine the number of SHPs produced in subthreshold heavy ion collisions at the LHC. In one month of collision of lead with lead, the yield of 16 TeVparticles is about 70 per year. To study the kinematically forbidden phenomena in proton-proton interactions in collisions of heavy nuclei at the LHC, an experiment on the production of antiprotons is proposed in the ALICE fixed target project.

关键词： Particle physics Heavy Ion Collisions Parton Model Antiproton Production

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Frontiers of physics 2016年第5期11卷 57-78页

作者： V. R. Shaginyan A. Z. Msezane G. S. Japaridze K. G. Popov V. A. Khodel Petersburg nuclear physics institute NRC Kurchatov Institute Gatchina 188300 Russia Clark Atlanta University Atlanta GA 30314 USA Komi Science center Ural Division RAS Syktyvkar 167982 Russia russian research Centre Kurchatov institute Moscow 123182 Russia McDonnell center for the Space Sciences & Department of physics Washington University St. Louisa MO 63130 USA

The aim of this review paper is to expose a new state of matter exhibited by strongly correlated Fermi systems represented by various heavy-fermion （HF） metals, two-dimensional liquids like 3He, compounds with quantum spin liquids, quasicrystals, and systems with one-dimensional quantum spin liquid. We name these various systems HF compounds, since they exhibit the behavior typical of HF metals. In HF compounds at zero temperature the unique phase transition, dubbed throughout as the fermion condensation quantum phase transition （FCQPT） can occur; this FCQPT creates flat bands which in turn lead to the specific state, known as the fermion condensate. Unlimited increase of the effective mass of quasiparticles signifies FCQPT; these quasiparticles determine the thermodynamic, transport and relaxation properties of HF compounds. Our discussion of numerous salient experimen- tal data within the framework of FCQPT resolves the mystery of the new state of matter. Thus, FCQPT and the fermion condensation can be considered as the universal reason for the non-Fermi liquid behavior observed in various HF compounds. We show analytically and using arguments based completely on the experimental grounds that these systems exhibit universal scaling behavior of their thermodynamic, transport and relaxation properties. Therefore, the quantum physics of different HF compounds is universal, and emerges regardless of the microscopic structure of the compounds. This uniform behavior allows us to view it as the main characteristic of a new state of matter exhibited by HF compounds.

关键词： quantum phase transition flat bands systems quantum spin liquids heavy fermions effects scaling behavior new state of matter non-Fermi-liquid states strongly correlated electron quasicrystals thermoelectric and thermomagnetic

Calculations of theα-decay properties of Z=120,122,124,126 isotopes

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Chinese physics C 2020年第10期44卷 98-114页

作者： Zhishuai Ge Gen Zhang Shihui Cheng Yu.S.Tsyganov Feng-Shou Zhang Key Laboratory of Beam Technology of Ministry of Education Beijing Radiation CenterBeijing 100875China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Flerov Laboratory of nuclear Reactions Joint Institute for Nuclear ResearchRU-141980 DubnaRussian Federation center of Theoretical nuclear physics National Laboratory of Heavy Ion Accelerator of LanzhouLanzhou 730000China

Theα-decay properties of even-Z nuclei with Z=120,122,124,126 are *** employ the generalized liquid drop model(GLDM),Royer's formula,and universal decay law(UDL)to calculate theα-decay *** comparing the theoretical calculations with the experimental data of known nuclei from Fl to Og,we confirm that all the employed methods can reproduce theα-decay half-lives *** preformation factor Pαandα-decay energy Qαshow that ^298,304,314,316,324,326,338,348120,^304,306,318,324,328,338122,and ^328,332,340,344124 might be ***α-decay half-lives show a peak at Z=120,N=184,and the peak vanishes when Z=122,124,*** on detailed analysis of the competition betweenα-decay and spontaneous fission,we predict that nuclei nearby N=184 undergoα-*** decay modes of ^287−339120,^294−339122,^300−339124,and ^306−339126 are also presented.

关键词： α-decay spontaneous fission lifetime

Mossbauer and magnetization studies of magnetic phase transitions in 0.5BiFeO_(3)-0.5NaNbO_(3)and 0.5LaFeO_(3)-0.5NaNbO_(3)solid solutions

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Journal of Advanced Dielectrics 2020年第1期10卷 28-33页

作者： S.I.Raevskaya S.P.Kubrin Jian Zhuang I.P.Raevski M.A.Malitskaya I.N.Zakharchenko M.S.Panchelyuga V.V.Titov research institute of physics and Faculty of physics Southern federal University Rostov-on-Don 344090Russia Electronic Materials research Laboratory Key Laboratory of the Ministry of Education and International center for Dielectric research Xi’an Jiaotong University Xi’an 710049P.R.China institute of Theoretical and experimental Biophysics russian Academy of Sciences Pushchino Moscow Region 142290Russia

0.5AFeO_(3)-0.5NaNbO_(3)(A=Bi,La)solid solution compositions were prepared using a solid phase reaction route from high-purity starting *** studies have shown that while for 0.5BiFeO_(3)-0.5NaNbO_(3)the magnetic phase transition temperature T_(M) value is about 150 K,for 0.5LaFeO_(3)-0.5NaNbO_(3),it is only≈25 *** dramatic difference in T_(M) values seems to be due to additional contribution of the magnetic superexchange between Fe^(3+)ions via the empty 6p-states of Bi^(3+)ions to the overall superexchange.

关键词： Multiferroic magnetic phase transition BiFeO_(3) magnetic superexchange

Quantitative tracking of trans-synaptic nose-to-brain transport of nanoparticles and its modulation by odor,aging,and Parkinson’s disease

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Nano research 2023年第5期16卷 7119-7133页

作者： Alexander V.Romashchenko Dmitrii V.Petrovskii Sergey Yu.Trotsky Ksenia N.Morozova Nina B.Illarionova Maria V.Zhukova Elena V.Kiseleva Marina B.Sharapova Daniil S.Zuev Konstantin E.Kuper Sergey Yu.Taskaev Anna I.Kasatova Dmitrii A.Kasatov Olga I.Solovieva Ivan A.Razumov Ludmila A.Gerlinskaya Mikhail P.Moshkin Yuri M.Moshkin The federal research center institute of Cytology and Genetics SB RASAcademician Lavrentiev Avenue10Novosibirsk 630090Russia International tomography center Institutskaya st.3ANovosibirsk 630090Russia G.K.Boreskov institute of Catalysis SB RASAcademician Lavrentiev Avenue5Novosibirsk 630090Russia The federal research center Budker institute of nuclear physics SB RASAcademician Lavrentiev Avenue11Novosibirsk 630090Russia institute of Computational Technologies Academician M.A.Lavrentiev avenue6Novosibirsk 630090Russia institute of Gene Biology Russian Academy of SciencesMoscow 117334Russia institute of Molecular and Cellular Biology SB RASAcad.Lavrentiev Ave8/2Novosibirsk 630090Russia federal research Centre of Biological Systems and Agrotechnologies RASst.January 929Orenburg 460000Russia

Nanoparticles(NPs)can be transported via the nose-to-brain(N_(2)B)***,quantitative data on their spatiotemporal dynamics and regulation of the N_(2)B transport are largely *** surveyed metal oxide/hydroxide NPs as magnetic resonance imaging(MRI)contrasts for quantitative N_(2)B *** containing divalent transition metals were the only ones capable of N_(2)B *** T1-weighted(T1W)MRI,we showed that Mn_(3)O_(4)-NPs were readily engulfed by olfactory receptor neurons(ORNs)without disrupting olfactory sensing,we mapped their N_(2)B *** neurons,the Mn_(3)O_(4)-NPs were localized to the cytosol,mitochondria,vesicles,moved at mixed fast and slow axonal transport velocities intraand extra-vesicularly through *** NPs’axonal transport is dependent on neuronal activity and microtubule *** Mn_(3)O_(4)-NPs were trans-synaptically transmitted through at least four synapses across the olfactory ***-synaptic transmission of the NPs was dependent on N-type Ca^(2+)channels and NMDA receptors but blocked by GABAB receptor activation.A five-parameter Weibull signal increase/decrease model fitted to the T1W MRI data allowed for estimating kinetic parameters of Mn_(3)O_(4)-NP accumulation/*** and relative accumulation rates,but not elimination,correlated negatively with the number of synapses from ORNs,indicating a coupling of the NPs’N_(2)B transport with spontaneous neuronal ***,olfactory stimuli(2,5-dimethylpyrazine and acetophenone)significantly modulated and rerouted the Mn_(3)O_(4)-NP N_(2)B transport odor ***,the NPs’trans-synaptic transmission was impaired by aging and the onset of Parkinson’s *** data suggest new approaches to diagnostics,functional neuroimaging,controlling N_(2)B drug delivery.

关键词： Mn_(3)O_(4)nanoparticles magnetic resonance imaging(MRI) nose-to-brain transport trans-synaptic transmission olfactory stimulation

Chapter 1 LHAASO Instruments and Detector technology

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Chinese physics C 2022年第3期46卷 1-35页

作者： Xin-Hua Ma Yu-Jiang Bi Zhen Cao Ming-Jun Chen Song-Zhan Chen Yao-Dong Cheng Guang-Hua Gong Min-Hao Gu Hui-Hai He Chao Hou Wen-Hao Huang Xing-Tao Huang Cheng Liu Oleg Shchegolev Xiang-Dong Sheng Yuri Stenkin Chao-Yong Wu Han-Rong Wu Sha Wu Gang Xiao Zhi-Guo Yao Shou-Shan Zhang Yi Zhang Xiong Zuo Key Laboratory of Particle Astrophyics&experimental physics Division&Computing center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China TIANFU Cosmic Ray research center ChengduSichuanChina University of Chinese Academy of Sciences Beijing 100049China Department of Engineering physics Tsinghua UniversityBeijing 100084China institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237ShandongChina institute for nuclear research of russian Academy of Sciences Moscow 117312Russia Moscow institute of physics and Technology Moscow 141700Russia Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina

The Large High Altitude Air Shower Observatory(LHAASO)(Fig.1)is located at ***(4410 m a.s.l.,600 g/cm^(2),29°21'27.56"N,100°08'19.66"E)in Daocheng,Sichuan province,*** consists of 1.3 km^(2) array(KM2A)of electromagnetic particle detectors(ED)and muon detectors(MD),a water Cherenkov detector array(WCDA)with a total active area of 78,000 m^(2),18 wide field-of-view air Cherenkov telescopes(WFCTA)and a newly proposed electron-neutron detector array(ENDA)covering 10,000 m^(2).Each detector is synchronized with all the other through a clock synchronization network based on the White Rabbit *** observatory includes an IT center which comprises the data acquisition system and trigger system,the data analysis *** this Chapter,all the above-mentioned components of LHAASO as well as infrastructure are described.

关键词： LHAASO gamma ray astronomy cosmic ray physics

Analytical description of shape transition in nuclear alternating parity bands

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Chinese physics C 2018年第12期42卷 112-122页

作者： E.V.Mardyban T.M.Shneidman E.A.Kolganova R.V.Jolos S.-G.Zhou Bogoliubov Laboratory of Theoretical physics Joint Institute for Nuclear ResearchDubna 141980Russia Dubna State University Dubna 141980Russia Kazan federal University Kazan 420008Russia CAS Key Laboratory of Theoretical physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China center of Theoretical nuclear physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000China Synergetic Innovation center for Quantum Effects and Application Hunan Normal UniversityChangsha 410081China

The angular momentum dependencies parity bands of heavy nuclei have been analyzed of parity splitting and electric dipole transitions in the alternating It is shown that these dependencies can be treated in a universal manner with a single critical angular momentum parameter, which characterizes phase transition from octupole vibrations to the stable octupole deformation. Using the simple but useful model of axially-symmetric reflection- asymmetric mode, the analytical expressions for parity splitting and electric dipole transitional moment have been obtained. The findings are in good agreement with the experimental data for various isotopes of Ra, Th, U, and Pu.

关键词： octupole deformation phase transition angular momentum

Gas-cooled thorium reactor at various fuel loadings and its modification by a plasma source of extra neutrons

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nuclear Science and Techniques 2019年第12期30卷 72-82页

作者： Andrey Arzhannikov Sergey Bedenko Vladimir Shmakov Vladimir Knyshev Igor Lutsik Vadim Prikhodko Igor Shamanin Budker institute of nuclear physics SB RAS NovosibirskRussia 630090 National research Tomsk Polytechnic University TomskRussia 634050 russian federal nuclear center–Zababakhin institute of Applied physics SnezhinskRussia 456770

This work presents the results of computer simulation of neutronic processes in a high-temperature gas-cooled thorium reactor for 30 different options of core *** guarantee stable and long-term reactor operation(7-10 years),the quantity of fuel compact dispersion phase and starting fuel composition was *** is demonstrated that it is possible in principle to substitute the near-axial recirculation zone of the reactor core by a long magnetic trap with a high-temperature plasma column for generating thermonuclear *** distribution of neutron yield along the length of the plasma source is also *** a thorium reactor,with a near-axial source of extra neutrons,can be applied for researching thermophysical and neutronic characteristics of dispersion thorium fuel to improve its *** results of the work are of great interest from the perspective of future advancement of the thermonuclear power industry,by means of creation of a hybrid installation based on a thorium reactor with a long plasma column as a source of additional neutrons.

关键词： Low-power thorium reactor Thorium hybrid reactor nuclear fuel evolution