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Reaction mechanisms in massive nuclei collisions and perspectives for synthesis of heavier superheavy elements

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nuclear Science and Techniques 2013年第5期24卷 98-106页

作者： GIARdiNA G NASIROV A K MANDAGLIO G CURCIARELLO F De LEO V FAZIO G ROMANIUK M dipartimento di Fisica e di Scienze della Terra dell'Università di Messina istituto nazionale di Fisica nucleare Sezione di Catania Joint Institute for nuclear Research Institute of nuclear Physics Centro Siciliano di Fisica nucleare e Struttura della Materia Catania 95125Italy

We discuss a hardship in synthesis of heaviest super heavy elements in massive nuclei reactions due to the hindrance to complete fusion of reacting nuclei caused on the onset of quasifission process which strongly competes with complete fusion and due to the strong increase of fission yields along the de-excitation cascade of the compound nucleus in comparison with the evaporation residue *** hindrance to formation of compound nucleus and evaporation residue is determined by the characteristic of the entrance channel.

关键词：超重元素反应机制合成碰撞聚变反应残余物复合核核反应

Characterisation of Photocathodes Based on Pb Thin Film Deposited by UV Pulsed Laser Ablation

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Journal of Materials Science & Technology 2014年第1期30卷 37-40页

作者： Francisco Gontad Antonella Lorusso Giancarlo Gatti Massimo Ferrario Laura Gioia Passione Luana Persano Nicola Lovergine Alessio Perrone istituto nazionale di Fisica nucleare e Università del Salento Università del Salento Dipartimento di Matematica e Fisica "E.De Giorgi" Laboratori Nazionali di Frascati Istituto Nazionale di Fisica Nucleare Center for Biomolecular Nanotechnologies Istituto Italiano di Tecnologia dipartimento di Ingegneria dell'Innovazione Università del Salento National Nanotechnology Laboratory(NNL)

This work deals with the deposition of lead （Pb） thin films by the UV pulsed laser ablation technique, for their further use as photocathode devices in superconducting radio frequency guns. Scanning electron microscopy and atomic force microscopy analyses were performed to study the morphological features of Pb thin films deposited on Si （100） and Nb substrates. The films showed a granular structure with a nearly fully covered surface only for that one deposited on Nb substrate. X-ray diffraction measurements indicate the growth of polycrystalline Pb thin films with a preferential orientation along （111） planes. Results of the photoemission performance of Pb thin film deposited on Nb substrate showed a very encouraging average value of quantum efficiency of 6 x 10-5 through a single-photon absorption process, promoting further studies in the realisation of Pb photocathodes by this technique.

关键词： Pulsed laser deposition Lead thin film Metallic photocathodes Quantum efficiency

Topical delivery of nerve growth factor for treatment of ocular and brain disorders

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Neural Regeneration Research 2021年第9期16卷 1740-1750页

作者： Gemma Eftimiadi Marzia Soligo Luigi Manni Daniela di Giuda Maria Lucia Calcagni Antonio Chiaretti Institute of Pediatrics Fondazione Policlinico Universitario Agostino GemelliIstituto di Ricovero e Cura a Carattere Scientifico(IRCCS)RomeItaly Institute of Translational Pharmacology Consiglio Nazionale delle Ricerche(CNR)RomeItaly Institute of nuclear Medicine Fondazione Policlinico Universitario Agostino GemelliIstituto di Ricovero e Cura a Carattere Scientifico(IRCCS)RomeItaly

Neurotrophins are a family of proteins that support neuronal proliferation, survival, and differentiation in the central and peripheral nervous systems, and are regulators of neuronal plasticity. Nerve growth factor is one of the best-described neurotrophins and has advanced to clinical trials for treatment of ocular and brain diseases due to its trophic and regenerative properties. Prior trials over the past few decades have produced conflicting results, which have principally been ascribed to adverse effects of systemic nerve growth factor administration, together with poor penetrance of the blood-brain barrier that impairs drug delivery. Contrastingly, recent studies have revealed that topical ocular and intranasal nerve growth factor administration are safe and effective, suggesting that topical nerve growth factor delivery is a potential alternative to both systemic and invasive intracerebral delivery. The therapeutic effects of local nerve growth factor delivery have been extensively investigated for different ophthalmic diseases, including neurotrophic keratitis, glaucoma, retinitis pigmentosa, and dry eye disease. Further, promising pharmacologic effects were reported in an optic glioma model, which indicated that topically administered nerve growth factor diffused far beyond where it was topically applied. These findings support the therapeutic potential of delivering topical nerve growth factor preparations intranasally for acquired and degenerative brain disorders. Preliminary clinical findings in both traumatic and non-traumatic acquired brain injuries are encouraging, especially in pediatric patients, and clinical trials are ongoing. The present review will focus on the therapeutic effects of both ocular and intranasal nerve growth factor delivery for diseases of the brain and eye.

关键词： Alzheimer's disease eye drops group B streptococcus meningitis glioma intranasal delivery neurotrophic keratitis nerve growth factor proNGF stroke traumatic brain injury

Angular Anisotropy of the Fission Fragments in the dinuclear System Model

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原子核物理评论 2015年第2期32卷 175-179页

作者： T.M.Shneidman A.V.Andreev C.Massimi M.T.Pigni G.Vannini A.Ventura 周善贵 Joint Institute for nuclear Research Institute of Theoretical Physics Chinese Academy of Sciences Kazan Federal University istituto nazionale di Fisica nucleare Sezione di Bologna dipartimento di Fisica dell Universit`a di Bologna nuclear Data Criticality Safety Oak Ridge National Laboratory

A theoretical evaluation of the collective excitation spectra of nucleus at large deformations is possible within the framework of the dinuclear system(DNS) model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of nucleons between clusters. In this work the method of calculation of the potential energy and the collective spectrum of fissioning nucleus at scission point is presented. Combining the DNS model calculations and the statistical model of fission we calculate the angular distribution of fission fragments for the neutron–induced fission of239 Pu.

关键词： cluster states in nuclei dinuclear system fission angular anisotropy

The enhanced X-ray Timing and Polarimetry mission—eXTP

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Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 3-27页

作者： ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio di Cosimo Sebastian diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang dianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences Institut für Astronomie und Astrophysik Eberhard Karls Universität INAF-istituto di Astrofisica e Planetologia Spaziali INFN-Roma Tor Vergata Via della Ricerca Scientifica 1 Department of Engineering Physics and Center for Astrophysics Tsinghua University DTU Building 327DK-2800 Kongens Institute of Space Sciences 08193 Cerdanyola del Valles Institut d’Estudis Espacials de Catalunya Sezione di Pisa Istituto Nazionale di Fisica NucleareLargo Bruno Pontecorvo3 Department of Astronomy University of Genevachemin d’Ecogia 16 Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna Istituto Nazionale di Astofisica Astronomical Institute Czech Academy of Sciences Max Planck Institute for Extraterrestrial Physics Giessenbachstr.1 CEA Paris-Saclay/IRFU Beijing Institute of Spacecraft System Engineering CAST Osservatorio Astronomico di Brera Istituto Nazionale di Astofisica Space Research Center Polish Academy of Sciences Key Laboratory of Advanced Material Microstructure of Education Ministry of China Institute of Precision Optical EngineeringSchool of Physics Science and EngineeringTongji University Department of Physics and Center for Astrophysics Tsinghua University Universita’degli Studi di Udine Via delle Scienze 206 Mullard Space Science Laboratory University College London Department of nuclear and Particle Physics University of Geneva SRON Netherlands Institute for Space Research Politecnico di Milano Sezione di Perugia Istituto Nazionale di Fisica Nucleare dipartimento di Fisica e Chimica Fondazione Bruno Kessler Dr.Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics Universität Erlangen-Nürnberg University of Pavia Department of ElectronicsInformation and Biomedical Engineering and INFN Pavia Sezione di Torino Istituto Nazionale di Fisica NucleareVia Pietro Giuria1 Department of Physics and Astronomy University of Leicester Sezione di Trieste Istituto Nazionale di Fisica Nucleare

In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave *** paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.

关键词： X-ray instrumentation X-ray polarimetry X-ray timing space mission:eXTP

Experimental Study of High-Spin Band Structures of 183Au

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IMP & HIRFL Annual Report 2004年 69-69页

作者： G. de Angelis,N. Marginean,A. Gadea,D. R. Napoli,M. Axiotis,C. Rusu,T. Martinez istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy istituto nazionale di fisisca nuclear Laboratori Nazionali di Legnaro Italy

High-spin states in 183Au have been studied experimentally by using the 159Tb(29Si, 5n)183Au reaction at a beam energy of 140 MeV. The 29Si beam of 8 pnA was provided by the accelerator complex of the Tandem-XTU and ALPI at the Laroratori Nazionali di Legnero, Italy, and focussed onto a natural metallic 159Tb foil of 2

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Infrared synchrotron radiation spectroscopy and microspectroscopy: new tools for interdisciplinary applications

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nuclear Science and Techniques 2003年第2期14卷 93-103页

作者： A.MARCELLI P.CALVANI Laboratori Nazionali di Frascati -INFN Via E. Fermi 4000044 FrascatiItalyIstituto Nazionale di Fisica della Materia and Dipartimento di FisicaUniversit La SapienzaP.le A.Moro20O185 RomaItaly

Synchrotron radiation sources, whose number is steadily increasing, are undoubtedly the most powerful and brilliant sources in the X-ray range. Although the synchrotron emission covers with high brilliance also the infrared region, its use in this energy range has developed at a much slower rate. Nowadays, after a couple of decades of attempts, the aim of extending the unique performances of the synchrotron source to the infrared domain is achieved by several dedicated beamlines in different countries. With their high-brilliance, polarized and broad-band radiation one may perform experiments that are out of the range of conventional sources from the near-IR up to the far-IR range.

关键词：红外同步加速器辐射光谱微波光谱 Fourier变换

DmpIRFs and DmpST:DAMPE instrument response functions and science tools for gamma-ray data analysis

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Research in Astronomy and Astrophysics 2019年第9期19卷 109-118页

作者： Kai-Kai Duan Wei Jiang Yun-Feng Liang Zhao-Qiang Shen Zun-Lei Xu Yi-Zhong Fan Fabio Gargano Simone Garrappa Dong-Ya Guo Shi-Jun Lei Xiang Li Mario Nicola Mazziotta Maria Ferna Munoz Salinas Meng Su Valerio Vagelli Qiang Yuan Chuan Yue Stephan Zimmer Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing210033China University of Chinese Academy of Sciences Beijing100049China School of Astronomy and Space Science University of Science and Technology of ChinaHefei230026China istituto nazionale di Fisica nucleare Sezione di Bari I-70125BariItaly istituto nazionale di Fisica nucleare Sezione di Perugia I-06123PerugiaItaly dipartimento di Fisica e Geologia Universita degli Studi di PerugiaI-06123PerugiaItaly Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China Department of nuclear and Particle Physics University of GenevaCH-1211Switzerland Department of Physics and Laboratory for Space Research University of Hong KongPok Fu LamHong KongChina

Observing GeV gamma-rays is an important goal of the DArk Matter Particle Explorer(DAMPE)for indirect dark matter searching and high energy astrophysics. In this work, we present a set of accurate instrument response functions for DAMPE(DmpIRFs) including the effective area, point-spread function and energy dispersion, which are crucial for gamma-ray data analysis based on statistics from simulation data. A dedicated software named DmpST is developed to facilitate the scientific analyses of DAMPE gamma-ray data. Considering the limited number of photons and angular resolution of DAMPE, the maximum likelihood method is adopted in DmpST to better disentangle different source components. The basic mathematics and framework regarding this software are also introduced in this paper.

关键词： gamma rays:general instrumentation:detectors methods:statistical

Two-proton sequential decay from excited states of ^(18)Ne

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nuclear Science and Techniques 2013年第5期24卷 89-91页

作者： YU Ningal MAGLIONE Enrico FERREIRA Lidia Institute of Particle Physics Huazhong Normal University dipartimento di Fisica "G.Galilei" PadovaItaly and Istituto Nazionale di Fisica Nucleare Centro de Física das Interac es Fundamentais and Departmento de FísicaInstituto Superior Técnico

Two-proton radioactivity from18Ne is discussed in terms of sequential *** branch ratios for oneproton emission from excited states are calculated,which including spectroscopic factors,obtained from a Shellmodel calculation with realistic *** branch ratios show that the two-proton emission from the 1-state of 18Ne at 7.94 MeV is most likely to go through the sequential *** same mechanism is discussed for other excited states at higher energy by different interactions.

关键词：质子衰变激发态质子发射分支比放射性壳模型衰减计算