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The HEPD particle detector of the CSES satellite mission for investigating seismo-associated perturbations of the Van Allen belts

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Science China(Technological Sciences) 2018年第5期61卷 643-652页

作者： AMBROSI Giovanni BARTOCCI Simona BASARA Laurent BATTISTON Roberto BURGER William J. CARFORA Luca CASTELLINI Guido CIPOLLONE Piero CONTI Livio CONTIN Andrea DE DONATO Cinzia DE SANTIS Cristian FOLLEGA Francesco M. GUANDALINI Cristina IONICA Maria IUPPA Roberto LAURENTI Giuliano LAZZIZZERA Ignazio LOLLI Mauro MANEA Christian MARCELLI Laura MASCIANTONIO Giuseppe MERGE Matteo OSTERIA Giuseppe PACINI Lorenzo PALMA Francesco PALMONARI Federico PANICO Beatrice PATRIZII Laura PERFETTO Francesco PICOZZA Piergiorgio POZZATO Michele PUEL Matteo RASHEVSKAYA Irina RICCI Ester RICCI Marco RICCIARINI Sergio Bruno SCOTTI Valentina SOTGIU Alessando SPARVOLI Roberta SPATARO Bruno VITALE Vincenzo Istituto Nazionale di fisica Nucleare (infn) Sezione di Perugia Perugia 06123 Italy Uninettuno University Rome 00186 Italy Istituto Nazionale di fisica Nucleare (infn) Sezione di Roma Tor Vergata Rome 00133 Italy Istituto Nazionale di fisica Nucleare (infn) TIFPA Povo (TN) 38123 Italy dipartimento di fisica Universita di Trento Povo (TN) 38123 Italy dipartimento di fisica Universita di Roma Tor Vergata Rome 00133 Italy IFAC-CNR Sesto Fiorentino (FI) 50019 Italy dipartimento di fisica e Astronomia Universita di Bologna Bologna 40127 Italy Istituto Nazionale di fisica Nucleare (infn) Sezione di Bologna Bologna 40127 Italy Istituto Nazionale di fisica Nucleare (infn) Sezione di Napoli Naples 80126 Italy Istituto Nazionale di fisica Nucleare (infn) LNE Frascati (RM) 00044 Italy Agenzia Spaziale Italiana (ASI) SSDC Rome 00133 Italy

CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2^(nd), 2018 from the Jiuquan Satellite Launch Center(China).

关键词： earthquake seismic-precursors particle detector Van Allen belts magnetosphere ionosphere space weather cosmic rays

Competition between fusion-evaporation and multifragmentation in central collisions in ^(58)Ni+^(48)Ca at 25A MeV

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Nuclear Science and Techniques 2013年第5期24卷 82-88页

作者： FRANCALANZA L ABBONDANNO U AMORINI F BARLINI S BINI M BOUGAULT R BRUNO M CARDELLA G CASINI G AGOSTINO M D' De FILIPPO V De SANCTIS J GERACI E GIUSSANI A GRAMEGNA F GUIOT B KRAVCHUK V La GUIDARA E LANZALONE G Le NEINDRE N MAIOLINO C MARINI P MORELLI L OLMI A PAGANO A PAPA M PIANTELLI S PIRRONE S POLITI G POGGI G PORTO F RUSSOTTO P RIZZO F VANNINI G VANNUCCI L infn Laboratori Nazionali del Sud-LNS Catania 95123Italy dipartimento di fisica Universitàdi Catania I-95129Italy infn sezione di Trieste Trieste I-34127Italy dipartimento di fisica Universitàdi FirenzeINFN Sezione di Firenze 1-50139Italy LPC Caen IN2P3-CNRS/ENSICAEN and UniversitéF-14050 Caen cedex 5-140France dipartimento di fisica Universitàdi Bologna and INFN Sezione di Bologna 4-50121Italy infn sezione di Catania I-95129 Italy infn sezione di Firenze I-50139 Italy dipartimento di fisica Universitàdi Milano and INFN Sezione di Milano1-20126Italy infn Laboratori Nazionali di Legnaro 1-35020 Italy Centro Siciliano di fisica Nucleare e Struttura della Materia Catania 1-95129Italy UniversitàKore Enna 1-94100Italy

The experimental data concerning the58Ni+48Ca reaction at Elab(Ni)=25A MeV,collected by using the CHIMERA 4π device,have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy *** a main criterion for centrality selection we have chosen the flow angle(flow) method,making an event-by-event analysis that considers the shape of events,as it is determined by the eigenvectors of the experimental kinetic-energy *** the selected central events(flow >60°) some global variables,good to characterize the pattern of central collisions have been *** main features of the reaction products were explored by using different constraints on some of the relevant observables,like mass and velocity distributions and their *** emphasis was devoted,for central collisions,to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a possible multifragmentation mechanism of a well defined(if any) transient nuclear *** evolution of the system and pre-equilibrium emission were taken into account by simulating the reactions in the framework of transport *** approaches have been envisaged(dynamical stochastic BNV calculations + sequential SIMON code,QMD,CoMD,etc.).Preliminary comparison of the experimental data with BNV calculations shows reasonable agreement with the assumption of sequential multifragmentation emission in the mass region of IMFs close to the heavy *** deviations from sequential processes were found for those IMFs in the region of masses intermediate between the mass of heavy residues and the mass of light *** simulations are in *** experimental analysis will be enriched also by information obtained inspecting the IMF-IMF correlation function,in order to elucidated the nature of space-time decay property of the emitting source associated with events having

关键词：多重碎裂中心碰撞蒸发过程 MeV 竞争熔合国际货币基金组织事件分析

A novel way to study the nuclear collective excitations

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Nuclear Science and Techniques 2023年第12期34卷 109-111页

作者： Gianluca Colò dipartimento di fisica“Aldo Pontremoli” Universitàdegli Studi di MilanoVia Celoria 1620133 MilanoItaly infn Sezione di MilanoVia Celoria 1620133 MilanoItaly

Typically, the unambiguous determination of the quantum numbers of nuclear states is a challenging task. Recently, it has been proposed to utilize to this aim vortex photons in the MeV energy region and, potentially, this could revolutionize nuclear spectroscopy because of the new and enhanced selectivity of this probe. Moreover, nuclei may become diagnostic tools for vortex photons. Still, some open questions have to be dealt *** exhibit intricate excitation spectra. Indeed, not all states within these spectra are equally significant. Some are not sensitive to specific terms in the nuclear Hamiltonian or do not display novel features, so that investigating them is not helpful to enhance our overall understanding of nuclear structure. On the other hand, there are states that manifest themselves as prominent peaks, e.g., in the inelastic scattering spectra. Among the best examples are the so-called Giant Resonances that lie at energies of the order of tens of MeV [1].

关键词： spectra structure excitation

Nonlinear diffusion and Transient Osmosis

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Communications in Theoretical Physics 2011年第8期56卷 352-366页

作者： Akira Igarashi Lamberto Rondoni Antonio Botrugno Marco Pizzi dipartimento di Matematica Politecnico di Torino infn Sezione di Torino Kavli Institute for Theoretical Physics China CAS Eltek Group

We investigate both analytically and numerically the concentration dynamics of a solution in two containers connected by a narrow and short channel, in which diffusion obeys a porous medium equation. We also consider the variation of the pressure in the containers due to the flow of matter in the channel. In particular, we identify a phenomenon, which depends on the transport of matter across nano-porous membranes, which we call ＂transient osmosis＂. We find that nonlinear diffusion of the porous medium equation type allows numerous different osmotic-like phenomena, which are not present in the case of ordinary Fickian diffusion. Experimental results suggest one possible candidate for transiently osmotic processes.

关键词： anomalous transport porous medium equation osmotic pressure

SMEFT is falsifiable through multi-Higgs measurements(even in the absence of new light particles)

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Communications in Theoretical Physics 2023年第9期75卷 69-74页

作者： Raquel Gómez-Ambrosio Felipe J Llanes-Estrada Alexandre Salas-Bernárdez Juan J Sanz-Cillero dipartimento di fisica Univ.di Torinoand INFNSezione di TorinoVia P.Giuria 1Torino10125Italy 2Univ.Complutense de MadridDept.Fisica Teorica and IPARCOSPlaza de las Ciencias 1Madrid28040Spain

By embedding the Standard Model effective field theory(SMEFT) in the more general Higgs effective field theory(HEFT), we expose correlations among the coefficients of the latter that, if found to be violated in future data, would lead to the experimental falsification of the SMEFT framework. These are derived from the necessary symmetric point of HEFT and analyticity of the SMEFT Lagrangian that allows the construction of the SMEFT expansion, as laid out by other groups, and properties at that point of the Higgs-flare function F(h) coupling Goldstone and Higgs bosons, of the Higgs potential V(h) and of the Higgs-top quark coupling function G(h).

关键词： SMEFT HEFT EFT effective field theories electroweak LHC quantum field theories

A preliminary simulation study of influence of backsplash on the plastic scintillator detector design in HERD experiment

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Radiation Detection Technology and Methods 2021年第3期5卷 332-338页

作者： Peng Hu Zhi-gang Wang Fabio Gargano Francesca Alemanno Corrado Altomare Tian-wei Bao Yong-wei Dong Valerio Formato dimitrios Kyratzis Nicola Mori Lorenzo Pacini Zheng Quan Davide Serini Jun-jing Wang Rui-jie Wang Ming Xu Bo-bing Wu Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Istituto Nazionale di fisica Nucleare(infn) Sezione di Bari70126 BariItaly Gran Sasso Science Institute(GSSI) 67100 L’AquilaItaly Istituto Nazionale di fisica Nucleare(infn) Laboratori Nazionali del Gran Sasso67100 L’AquilaItaly dipartimento Interateneo di fisica dell’Universitàe del Politecnico di Bari 70125 BariItaly Istituto Nazionale di fisica Nucleare(infn) Sezione di Roma Tor Vergata00133 RomeItaly Istituto Nazionale di fisica Nucleare(infn) Sezione di Firenze50019 Sesto FiorentinoItaly

Background The plastic scintillator detector(PSD)is one of the detectors in the high energy cosmic radiation detection(HERD)facility,which is designed for gamma-ray detection and a redundant charge *** will lead to a decrease in PSD’s performance of gamma-ray detection and charge measurement,which should be carefully *** Two preliminary segmentation schemes of the PSD and two veto strategies have been proposed to suppress the backsplash *** this paper,we focus on the influence of the backsplash caused by gamma *** gamma-ray trigger efficiency and identification efficiency were studied in the case of different cell sizes and veto strategies,which can provide guidance on the PSD *** A Monte Carlo simulation based on Geant4 has been *** simplify the simulation,the PSD is segmented into 1 cm3 cubes which can be easily aggregated into cells with different sizes during *** and conclusion Side_Veto can be used as a baseline design of veto strategy,whereas Smart_Veto can be selected as an upgraded *** the PSD bar cell with a width of less than 11 cm and the PSD tile cell with a width of less than 20 cm can achieve a sufficiently high gamma-ray trigger efficiency(>80%),which realizes the primary goal of the ***,both the PSD bar cell with a width of less than 3 cm and the PSD tile cell with a width of less than 20 cm can ensure a sufficiently high gamma-ray identification efficiency(>80%)for photons up to 800 GeV.

关键词： Plastic scintillator detector Gamma-ray detection Backsplash Veto

Effects of Λ hyperons on the deformations of even–even nuclei

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Chinese Physics C 2022年第6期46卷 212-218页

作者： C.F.Chen Q.B.Chen Xian-Rong Zhou Y.Y.Cheng Ji-Wei Cui H.-J.Schulze Department of Physics East China Normal UniversityShanghai 200241China School of Physics and Optoelectronic Engineering Xidian UniversityXi'an 710071China infn sezione di Catania Dipartimento di FisicaUniversitádi CataniaVia Santa Sofia 6495123 CataniaItaly

The deformations of multi-Λ hypernuclei corresponding to even-even core nuclei ranging from^(8)Be to^(40)Ca with 2,4,6,and 8 hyperons are studied using the deformed Skyrme-Hartree-Fock *** is found that the deformations are reduced when adding 2 or 8 Λ hyperons,but enhanced when adding 4 or 6 Λ *** differences are attributed to the fact that Λ hyperons are filled gradually into the three deformed p orbits,of which the [110] 1/2^(-)orbit is prolately deformed and the degenerate [101]1/2^(-)and [101]3/2^(-)orbits are oblately deformed.

关键词： deformation even-even nuclei effects of hyperon(s)

Effects of a kaonic meson on the ground-state properties of nuclei

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Chinese Physics C 2022年第6期46卷 183-191页

作者： Jing Guo D.H.Chen Xian-Rong Zhou Q.B.Chen H-J.Schulze Department of Physics East China Normal UniversityShanghai 200241China infn sezione di Catania Dipartirnento di FisicaUniversita di CataniaVia Santa Sofia 6495123 CataniaItaly

The effects of an additional K-meson on the ground-state properties of nuclei are investigated within an axially-deformed Skyrme-Hartree-Fock approach combined with a Skyrme-type kaon-nucleon *** K-meson increases the binding energies of all nuclei,whereas it affects deformations only for light nuclei without shell *** nucleon drip lines are modified due to the strongly attractive K-N *** is attributed to the behavior of the highest-occupied nucleon single-particle levels near the drip lines,which is analyzed in detail.

关键词： kaonic nuclei drip line Skyrme-Hartree-Fock approach

Energy spectrum of cosmic protons and helium nuclei by a hybrid measurement at 4300 m a.s.l.

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Chinese Physics C 2014年第4期38卷 25-31页

作者： B.Bartoli P.Bernardini 毕效军 I.Bolognino P.Branchini A.Budano A.K.Calabrese Melcarne P.Camarri 曹臻 R.Cardarelli S.Catalanotti 陈松战陈天禄 P.Creti 崔树旺戴木忠 A.D'Amone 单增罗布 I.De Mitri B.D'Ettorre Piazzoli T.di Girolamo G.di Sciascio 冯存峰冯朝阳冯振勇苟全补郭义庆何会海胡海兵胡红波 M.Iacovacci R.Iuppa 贾焕玉拉巴次仁厉海金 G.Liguori 刘成刘俊刘茂元卢红马玲玲马欣华 G.Mancarella S.M.Mari G.Marsella D.Martello S.Mastroianni P.Montini C.C.Ning M.Panareo B.Panico L.Perrone P.Pistilli F.Ruggieri P.Salvini R.Santonico S.N.Sbano 沈培若盛向东石峰 A.Surdo 谭有恒 P.Vallania S.Vernetto C.Vigorito 王辉吴超勇吴含荣薛良杨群羽杨先楚姚志国袁爱芳查敏张慧敏张力张学尧张勇赵静扎西次仁扎西桑珠周勋秀祝凤荣朱清棋 G.Zizzi 白云翔陈明君陈垚冯少辉高博顾旻皓侯超李晓晓刘佳刘加丽王旭肖刚张丙开张寿山周斌左雄 dipartimento di fisica dell’Università di Napoli "Federico II" Complesso Universitario di Monte Sant’Angelovia Cinthia Istituto Nazionale di fisica Nucleare Sezione di Napoli Complesso Universitario di Monte Sant’Angelovia Cinthia dipartimento di Matematica e fisica "Ennio De Giorgi" Università del Salento via per Arnesano Istituto Nazionale di fisica Nucleare Sezione di Lecce via per Arnesano Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences dipartimento di fisica dell’Università di Pavia via Bassi 627100 Pavia Italy Istituto Nazionale di fisica Nucleare Sezione di Pavia via Bassi 627100 Pavia Italy Istituto Nazionale di fisica Nucleare Sezione di Roma Tre via della Vasca Navale 8400146 Roma Italy Istituto Nazionale di fisica Nucleare-CNAF Viale Berti-Pichat 6/240127 Bologna Italy dipartimento di fisica dell’Università di Roma "Tor Vergata" via della Ricerca Scientifica Istituto Nazionale di fisica Nucleare Sezione di Roma Tor Vergata via della Ricerca Scientifica Tibet University Hebei Normal University Yunnan University Shandong University Southwest Jiaotong University dipartimento di fisica dell’Università "Roma Tre" via della Vasca Navale 8400146 Roma Italy Osservatorio Astrofisico di Torino dell’Istituto Nazionale di Astrofisica via P.Giuria 110125 Torino Italy Istituto Nazionale di fisica Nucleare Sezione di Torino via P.Giuria 110125 Torino Italy dipartimento di fisica dell’Università di Torino via P.Giuria 110125 Torino Italy Physics Department Kunming University Normal College of Fuyang

The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured below the so-called ＂knee＂ by using a hybrid experiment with a wide field-of-view Cherenkov telescope and the Resistive Plate Chamber （RPC） array of the ARGO-YBJ experiment at 4300 m above sea level. The Hydrogen and Helium nuclei have been well separated from other cosmic ray components by using a multi-parameter technique. A highly uniform energy resolution of about 25% is achieved throughout the whole energy range （100-700 TeV）. The observed energy spectrum is compatible with a single power law with index γ=-2.63±0.06.

关键词： Cherenkov telescope ARGO-YBJ energy spectrum hybrid measurement composition