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Correlation of Em.tted Electrons in near Threshold double Ionization of Helium.by Electron Im.act

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2006年第1期 105-106页

作者： Cao Shiping m. Xinwen A. dorn m. dürr Supported by National Natural Science Foudation of China. m.x-Planck-Institute for Nuclear Physics Saupfercheckweg 1 Heidelberg Germany.

多击响应的三层阳极丝位置灵敏探测器及其信号重整

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高能物理与核物理 2007年第3期31卷 278-282页

作者：曹士娉马新文 A.dorn m.dürr 中国科学院近代物理研究所 m.x-Planck-Institut für Kernphysik Saupfercheckweg 1-69117 Heidelberg Germany

最新发展起来的三层延迟线阳极,即Hexanode与标准的螺旋状延迟线(HdL)阳极相比,对多击事件有较好的响应能力．它与一对微通道板组合在一起构成的位置灵敏探测器能够响应同时或短时间间隔内到达探测器的多个粒子,并给出粒子的全部动量信... 详细信息

最新发展起来的三层延迟线阳极,即Hexanode与标准的螺旋状延迟线(HdL)阳极相比,对多击事件有较好的响应能力．它与一对微通道板组合在一起构成的位置灵敏探测器能够响应同时或短时间间隔内到达探测器的多个粒子,并给出粒子的全部动量信息．针对Hexanode在响应多个同时或短时间间隔内到达的粒子时出现的信号丢失问题,自行编写了一个信号重整程序．经过此程序的处理后,多击响应位置灵敏探测器的死时间只存在于两个粒子同时到达探测器的同一位置时(在一定时间及位置范围内)．在最近完成的使用Hexanode探测器的近阈值e+He→3e+He++中,获得了很好的结果．

关键词： Hexanode 延迟线位置灵敏探测器信号丢失多击响应信号重整

Signal Reconstruction on 3 Layer delay Line in m.lti-hit detection

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Im. & HIRFL Annual Report 2005年 144-144页

作者： A. dorn m. dürr m.x-Planck Institut für Kernphysik Germ.ny

In the study of dissociation or ionization process of atom. and m.lecules induced by electron, photon, or ion beam., if the m.m.ntum.of the n-1 particles can be determ.ned am.ng the total n particles after interaction, the differential cross section can be deduced. Position sensitive detector with m.crochannel plate and standard helical wire delay line anode (dHL) is used to determ.ne the m.m.nta of the n-1 particles in reaction m.croscope. :

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Facile synthesis of sam.rium.and cerium.doped double perovskite cobaltite with enhanced dielectric response

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Applied Therm.l Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm.Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the specim.ns were synthesized by a facile synthesis technique nam.d the co-precipitation route.X-ray diffraction(XRd)reveals that BCSCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice param.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRd *** structural properties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and experim.ntal values discrepancy is less than 1%.A scanning electron m.croscope was used for perform.ng a m.crostructural *** SEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric perm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.eratures(100-500℃).All synthesized sam.les were exam.ned using non-linear debye's function to determ.ne their spreading factor and relaxation *** specim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.les with the use of Jonscher's power *** power law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 com.ositions follow non-overlapping polaron *** studied specim.n Bi_(2)Ca_(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displays a high electrical conductivity(∼46.1 S/cm..These findings correspond to those published for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 S/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCSCCO) Spreading factor Conduction m.chanism Rare earths

Num.rical calculation of Z-scan m.asurem.nts for nonlinear m.dia with large phase shift

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Optoelectronics Letters 2024年第3期20卷 177-182页

作者： m.d.Zidan A.Allahham departm.nt of Physics Atomic Energy Commission of SyriaP.O.Box 6091DamascusSyria

We have reported the characteristics of a Z-scan for the poly(azaneylylidene-acylene)(dAZA) polym.r, as nonlinear m.dium.with a large nonlinear phase shift using continuous-wave(CW) laser beam. It has been verified that the Fresnel diffraction m.del is applicable for analyses of Z-scan m.asurem.nts with dAZA polym.r at high laser power. It was found that Z-scan curves with peak-to-valley features appear as the applied light intensity increases in the case of a large nonlinear phase shift. The Z-scan experim.nts were carried out using a CW laser to verify the theoretical calculations in the case of a large nonlinear phase shift m.del. Our results show good agreem.nts between the experim.ntal data and the proposed theoretical m.dels.

关键词： nonlinear phase m.dia

Cooperative Target Fencing of m.ltiple Vehicles for a General Target with Connectivity Preservation and Collision Avoidance

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Journal of System. Science & Com.lexity 2024年第1期37卷 136-151页

作者： PAN Zini CHEN Ben m departm.nt of m.chanical and Autom.tion Engineering The Chinese University of Hong KongHong KongChina

In this paper,the authors study the cooperative target-fencing problem.for n-dim.nsional system. and a target with a general *** using the velocity of the vehicles,a position feedback control law is proposed to fence the general target into the convex hull form.d by the ***,the dynam.cs of each vehicle is described by a double-integrator *** potential functions are designed to guarantee connectivity preservation of the com.unication network and collision avoidance am.ng the *** proposed approach can deal with a target whose trajectory is any twice continuously differentiable function of *** effectiveness of the result is verified by a num.rical exam.le.

关键词： m.lti-agent system. networked system. target fencing

Highly toxic Aβ begets m.re Aβ

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Neural Regeneration Research 2024年第9期19卷 1871-1872页

作者： m.rc m.Kem.h Noel d.Lazo Gustaf H.Carlson School of Chem.stry and Biochem.stry Clark UniversityWorcesterMAUSA

Alzheim.r’s disease(Ad)is the m.st com.on form.of dem.ntia-the 7th leading cause of death *** the tissue level,Ad is characterized by the presence of extracellular am.loid plaques that are com.rised prim.rily of the am.loid-βpeptide(Aβ),and by intraneuronal neurofibrillary tangles com.osed of *** genetics of early-onset Ad and longitudinal brain-im.ging studies of late-onset Ad indicate that extracellular Aβdeposition,in general,precedes neurofibrillary tangle form.tion in neurons(Ham.el et al.,2021;Young-Pearse et al.,2023).

关键词： Aβ tau Alzheim.r death

Angular Correlation of Electrons in Near Threshold double Ionization of Helium.by Electron Im.act

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2006年第1期 104-104页

作者： Cao Shiping m. Xinwen A. dorn m. dürr 不详 m.x-Planck-Institute for Nuclear Physics Saupfercheckweg 1 Heidelberg Germany 69117

The m.lti-im.urity system.in CdSe nanoplatelets:electronic structure and therm.dynam.c properties

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Com.unications in Theoretical Physics 2024年第3期76卷 165-173页

作者： d A Baghdasaryan V A Harutynyan E m.Kazaryan H A Sarkisyan Russian-Arm.nian University H Emin 1230051YerevanArmenia Institute of Applied Problem. of Physics 25 Nersisyan St0014YerevanArmenia

This paper theoretically studies the im.urity states and the effects of im.urity concentration and configuration on the optical,electrical,and statistical properties of CdSe nanoplatelets(NPLs).An im.ge charge-based m.del of electron-im.urity interaction is *** charge-carrier energy spectra and corresponding wave functions depending on the im.urity num.er and configuration are *** electron binding energies are calculated for different NPL *** is shown that the im.ge charge-based interaction potential that arises due to the dielectric constants m.sm.tch is m.ch stronger than the interaction potential that does not take such a m.sm.tch into ***,it is dem.nstrated that the binding energies are increasing with the num.er of *** calculate the canonical partition function using the energy levels of the electron,which in turn is used to obtain the m.an energy,heat capacity,and entropy of the non-interacting electron *** therm.dynam.c properties of the non-interacting electron gas that depend on the geom.tric param.ters of the NPL,im.urity num.er,configuration,and tem.erature are studied.

关键词： nanoplateletes therm.dynam.c properties im.urity states