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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)

Nuclear liquid-gas phase transition within a Brueckner-Hartree-Fock approach

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Chinese Physics C 2022年第11期46卷 231-237页

作者： Jing Zhang Hong-Ming Liu Zeng-Hua Li G.F.Burgio H.-J.Schulze Institute of Modern Physics Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)Fudan UniversityShanghai 200433China infn sezione di Catania Dipartimento di Fisica e AstronomiaUniversitàdi CataniaVia S.Sofia 64I-95123 CataniaItaly

The critical parameters of the liquid-gas phase transition of symmetric nuclear matter are computed using the Brueckner-Hartree-Fock method at finite temperature by employing different realistic nucleon-nucleon *** effects on single-particle potentials,defect functions,and three-body forces are discussed in *** obtained from the full procedure and frozen-correlations approximation are *** find critical temperatures of approximately 14 to 19 MeV and critical densities in the range of 0.05 to 0.08fm^(-3),depending on the interactions employed.

关键词： nuclear liquid-gas phase transition Brueckner-Hartree-Fock approach symmetric nuclear matter

Thermal management for the underwater frontend and readout electronics of JUNO 20‑inch PMTs

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Radiation Detection Technology and Methods 2023年第3期7卷 418-426页

作者： Yangfu Wang Xiaoshan Jiang Jun Hu Peiliang Wang Lei Fan Shaojing Hou Zhe Ning Yunhua Sun Xiongbo Yan Zheng Wang Ziyue Yan Peiran Ye Jie Zhang Alberto Garfagnini Antonio Bergnoli Riccardo Brugnera Beatrice Jelmini Filippo Marini Marco Grassi Mariia Redchuk Andrea Serafini Katharina von Sturm Institute of High Energy Physics BeijingChina University of China Academy of Sciences Beijing 100049China infn sezione di Padova PaduaItaly dipartimento di Fisica e Astronomia Universita di PadovaPaduaItaly

Background The Jiangmen underground neutrino observatory(JUNO)is a new generation of long-term operation neutrino experimental platform under construction in Jiangmen,Guangdong province of southern *** underwater frontend and readout electronics(F&R electronics)are placed nearby the 20-inch PMTs and readout current signals from three *** electronics are sealed in a stainless-steel underwater box to keep them dry,and temperature control of the electronics plays a significant role in their *** A conductive cooling structure based on the passive cooling method is designed for the 20-inch PMT F&R *** numerical simulation and experimental tests were performed to evaluate the cooling structures'thermal *** The results show that the case temperature of the respective chip for 20-inch PMT F&R electronics is less than 30℃in ambient still *** The case temperature of the respective chip meets the strict temperature requirement for the F&R *** JUNO collaboration has adopted this cooling structure for the 20-inch PMT readout electronics.

关键词： Thermal management JUNO PMT Electronics

The new P_(cs)(4459),Z_(cs)(3985),Z_(cs)(4000) and Z_(cs)(4220) and the possible emergence of flavor pentaquark octets and tetraquark nonets

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Science Bulletin 2022年第12期67卷 1209-1212页

作者： Jacopo Ferretti Elena Santopinto Department of Physics University of JyväskyläP.O.Box 35(YFL)40014 JyväskyläFinland infn Sezione di GenovaVia Dodecaneso 3316146 GenovaItaly

Recently,the LHCb and BESⅢCollaborations provided results for two Z_(cs)tetraquarks and a P_(cs)*** are hiddencharm four-and five-quark states,characterized by ccsn(ccns)and ccnns quark structures,respectively,where ... 详细信息

关键词： BESⅢ 强子九重态夸克

Flexible fully organic indirect detector for megaelectronvolts proton beams

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npj Flexible Electronics 2023年第1期7卷 513-523页

作者： Sabrina Calvi Laura Basiricò Sara M.Carturan Ilaria Fratelli Antonio Valletta Alberto Aloisio Stefania De Rosa Felix Pino Marcello Campajola Andrea Ciavatti Luca Tortora Matteo Rapisarda Sandra Moretto Matteo Verdi Stefano Bertoldo Olivia Cesarini Paolo di Meo Massimo Chiari Francesco Tommasino Ettore Sarnelli Luigi Mariucci Paolo Branchini Alberto Quaranta Beatrice Fraboni infn Sezione di RomaTreVia Della Vasca Navale 8400146 RomaItaly CNR-Institute for Microelectronics and Microsystems(IMM)Via Del Fosso Del Cavaliere 10000133 RomeItaly Department of Physics and Astronomy University of BolognaViale C.Berti Pichat 6/240127 BolognaItaly infn Sezione di BolognaViale C.Berti Pichat 6/240127 BolognaItaly Department of Physics and Astronomy University of PadovaVia Marzolo 8PadovaItaly infn-Laboratori Nazionali di Legnaro Viale dell’Università2LegnaroItaly University of Naples Federico II Department of PhysicsComplesso Univ.di Monte S.AngeloEdificio GVia Cintia80126 NapoliItaly infn-sezione di Napoli-Complesso Univ.di Monte S.Angelo Edificio GVia Cintia80126 NapoliItaly CNR-SPIN Via Campi Flegrei3480078 PozzuoliNAItaly Task Force di Bioelettronica University of Naples Federico IINapoliItaly Department of Sciences Roma Tre UniversityVia della Vasca Navale 8400146 RomaItaly infn Sezione di PadovaVia Marzolo 8PadovaItaly infn Sezione di FirenzeVia G.Sansone 150019 Sesto FiorentinoFlorenceItaly Department of Physics University of TrentoVia Sommarive 1438123 TrentoPovoItaly infn-TIFPA Via Sommarive 1438123 TrentoPovoItaly Department of Industrial Engineering University of TrentoVia Sommarive 938123 TrentoPovoItaly

A flexible,fully organic detector for proton beams is presented *** detector operates in the indirect mode and is composed of a polysiloxane-based scintillating layer coupled to an organic phototransistor,that is assessed for flexibility and low-voltage operation(V=−1 V),with a limit of detection of 0.026 Gy min^(−1).We present a kinetic model able to precisely reproduce the dynamic response of the device under irradiation and to provide further insight into the physical processes controlling *** detector is designed to target real-time and in-situ dose monitoring during proton therapy and demonstrates mechanical flexibility and low power operation,assessing its potential employment as a personal dosimeter with high comfort and low risk for the *** results show how such a proton detector represents a promising tool for real-time particle detection over a large area and irregular surfaces,suitable for many applications,from experimental scientific research to innovative theranostics.

关键词： fully limit insight

^3PF2 neutron superfluidity in neutron stars and three-body force effect

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Chinese Physics B 2008年第9期17卷 3289-3293页

作者：崔常喜左维 H.J.Schulze Institute of Modern Physics Chinese Academy of Sciences infn sezione di Catania

We investigate the ^3PF2 neutron superfluidity in H-stable neutron star matter and neutron stars by using the BCS theory and the Brueckner-Hartree-Fock approach. We adopt the Argonne V18 potential supplemented with a microscopic three-body force as the realistic nucleon-nucleon interaction. We have concentrated on studying the threebody force effect on the ^3PF2 neutron pairing gap. It is found that the three-body force effect is to enhance remarkably the ^3PF2 neutron superfluidity in neutron star matter and neutron stars.

关键词： ^3PF2 superfluidity neutron star three-body force Brueckner-Hartree-Fock approach

Alpha Magnetic Spectrometer (AMS02) experiment on the International Space Station (ISS)

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Nuclear Science and Techniques 2003年第3期14卷 182-194页

作者： Behcet ALPAT infn sezione di Perugia Via A.Pascoli06123PerugiaItaly

The Alpha Magnetic Spectrometer experiment is realized in two phases. A precursor flight (STS-91)with a reduced experimental configuration (AMS01) has successfully flown on space shuttle discovery in June *** final version (AMS02) will be installed on the International Space Station (ISS) as an independent module inearly 2006 for an operational period of three years. The main scientific objectives of AMS02 include the searches forthe antimatter and dark matter in cosmic rays. In this work we will discuss the experimental details as well as the im-proved physics capabilities of AMS02 on ISS.

关键词： α磁分光仪国际空间站反物质暗物质

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

KLOE results on scalar and pseudoscalar mesons

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Chinese Physics C 2010年第6期34卷 632-637页

作者： P.Gauzzi Sapienza Università di Roma and infn sezione di Roma P.le A.Moro

The data collected by the KLOE Collaboration at the Frascati φ-factory DAФNE from 2001 to 2006 have been used for extensive studies in meson spectroscopy. The decays of the scalar mesons a0（980） and f0（980） into two pseudoscalar mesons have been exploited to measure the relevant parameters of those resonances. The radiative decays φ →ηγ and η＇γ have been used for the determination of the pseudoscalar mixing angle and to search for a possible gluonium content in the η＇. The dynamics of the η → 3π decay has been studied and the Dalitz Plot parameters have been measured. The large amount of η mesons produced allowed also to study interesting rare η decays.

关键词： e^+e^- interactions φ-factory scalar mesons pseudoscalar mesons