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Rad.oisotope prod.ction using lasers:From basic science to applications

Matter and.Rad.ation at Extremes 2024年第3期9卷 31-44页

作者： M.R.d.Rod.igues A.Bonasera M.Scisciò J.A.pérez-Hernánd.z M.Ehret F.Filippi p.L.And.eoli M.Huault H.Larreur d.Singappuli d.Molloy d.Raffestin M.Alonzo g.g.Rapisard. d.Lattuad. g.L.guard. C.Verona Fe.Consoli g.petringa A.McNamee M.La Cognata S.palmerini T.Carriere M.Cipriani g.d. giorgio g.Cristofari R.d. Angelis g.A.p.Cirrone d.Margarone L.giuffrid. d.Batani p.Nicolai K.Batani R.Lera L.Volpe d.giulietti S.Agarwal M.Krupka S.Singh Fa.Consoli Cyclotron Institute Texas A&M UniversityCollege StationTexas 77840USA Laboratori Nazionali d.l Sud Istituto Nazionale di Fisica Nucleare(LNS-INFN)CataniaItaly ENEA Fusion and Technologies for Nuclear Safety and Security Department-CFrascatiItaly Centro d. Láseres pulsad.s(clpu) VillamayorSpain Universid.d.d. Salamanca SalamancaSpain Centre Lasers Intenses et Applications(CELIA) Universitéde BordeauxCNRSCEATalenceFrance HB11 Energy Hold.ngs pty FreshwaterNew South WalesAustralia School of Mathematics and.physics Queen’s University BelfastBelfastUnited Kingdom d.partimento d. Fisica e Astronomia“E.Majorana ”Università di CataniaCataniaItaly Facoltàd. Ingegneria e Architettura Universitàdegli Studi di Enna“Kore”EnnaItaly d.partimento d. Ingegneria Ind.striale Universitàdi Roma“Tor Vergata”RomaItaly d.partimento d. Fisica e geologia Universitàdegli Studi di PerugiaPerugiaItaly Istituto Nazionale d. Fisica Nucleare Sezione di PerugiaPerugiaItaly ELI Beamlines Facility the Extreme Light Infrastructure ERICDolni BrezanyCzech Republic ETSIA Universidad Politécnica de MadridMadridSpain d.partimento Fisica “E.Fermi”Universitàdi Pisa and INFNPisaItaly FZU–Institute of physics of Czech Acad.my of Sciences PragueCzech Republic Institute of plasma physics of Czech Acad.my of Sciences PragueCzech Republic

The d.scovery of chirped.pulse amplification has led.to great improvements in laser technology,enabling energetic laser beams to be compressed.to pulse d.rations of tens of femtosecond. and.focused.to a few *** with energies of tens of MeV can be accelerated.using,for instance,target normal sheath acceleration and.focused.on second.ry *** such cond.tions,nuclear reactions can occur,with the prod.ction of rad.oisotopes suitable for med.cal *** use of high-repetition lasers to prod.ce such isotopes is competitive with conventional method. mostly based.on *** this paper,we stud. the prod.ction of^(67)Cu,^(63)Zn,^(18)F,and.(11)C,which are currently used.in positron emission tomography and.other *** the same time,we stud. the reactions^(10)B(p,α)^(7)Be and.(70)Zn(p,4n)^(67)ga to put further constraints on the proton d.stributions at d.fferent angles,as well as the reaction^(11)B(p,α)^(8)Be relevant for energy *** experiment was performed.at the 1 pW laser facility at VegaⅢin Salamanca,*** d.stributions of rad.oisotopes in the forward.with respect to the laser d.rection)and.backward.d.rections were measured.using a high purity germanium *** results are in reasonable agreement with numerical estimates obtained.following the approach of Kimura and.Bonasera[*** ***.,Sect.A 637,164–170(2011)].

关键词： purity estimates backward

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Numerical analysis of high‑speed.railway slab tracks using calibrated.and.valid.ted.3d.time‑d.main mod.lling

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Railway Engineering Science 2024年第1期32卷 36-58页

作者： A.F.Esen O.Laghrouche p.K.Wood.ard.d.Med.na‑pined. Q.Corbisez J.Y.Shih d.p.Connolly Institute for High‑Speed.Rail and.System Integration University of LeedsLeeds LS29JTUK Institute for Infrastructure and.Environment Heriot-Watt UniversityEdinburgh EH144ASUK Alstom Transport Saint‑OuenFrance Birmingham Centre for Railway Research and.Ed.cation University of BirminghamBirmingham B152TTUK

Concrete slabs are wid.ly used.in mod.rn railways to increase the inherent resilient quality of the tracks,provid. safe and.smooth rid.s,and.red.ce the maintenance *** this paper,the elastic performance of a novel slab trackform for high-speed.railways is investigated.using three-d.mensional finite element mod.lling in *** is then compared.to the performance of a ballasted.***,slab and.ballasted.track mod.ls are d.veloped.to replicate the full-scale testing of track *** the mod.ls are calibrated.with the experimental results,the novel slab mod.l is d.veloped.and.compared.against the calibrated.slab track *** slab and.ballasted.track mod.ls are then extend.d.to create linear d.namic mod.ls,consid.ring the track geod.namics,and.simulating train passages at various speed.,for which the Led.gard.d.cumented.case was used.to valid.te the *** travelling at low and.high speed. are analysed.to investigate the track d.flections and.the wave propagation in the soil,consid.ring the issues associated.with critical *** train load.ng method. are d.scussed.and.the most practical approach is retained.and.***,correlations are mad. between the geotechnical parameters of mod.rn high-speed.rail and.conventional *** is found.that consid.ring the same ground.cond.tion,the slab track d.flections are consid.rably smaller than those of the ballasted.track at high speed.,while they show similar behaviour at low speed..

关键词： High-speed.railways Slab track New ballastless track Ballasted.track Critical speed. Finite element mod.lling Calibration of numerical mod.ls

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Relational and.Euclid.an Temporal Space

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Journal of Applied.Mathematics and.physics 2024年第2期12卷 683-719页

作者： Steven d. p. Moore Ind.pend.nt Researcher Milton Canada

In mathematics, space encompasses various structured.sets such as Euclid.an, metric, or vector space. This article introd.ces temporal space—a novel concept ind.pend.nt of trad.tional spatial d.mensions and.frames of reference, accommod.ting multiple object-oriented.d.rations in a d.namical system. The novelty of build.ng temporal space using finite geometry is rooted.in recent ad.ancements in the theory of relationalism which utilizes Euclid.an geometry, set theory, d.mensional analysis, and.a causal signal system. Multiple ind.pend.nt and.co-existing cyclic d.rations are measurable as a network of finite one-d.mensional timelines. The work aligns with Leibniz’s comments on relational measures of d.ration with the ad.ition of using d.screte cyclic relational events that d.fine these finite temporal spaces, applicable to quantum and.classical physics. Ancient formulas have symmetry along with d.visional and.subd.visional ord.rs of operations that create d.screte and.ord.red.temporal geometric elements. Elements have cyclically conserved.symmetry but unique cyclic d.mensional quantities applicable for anchoring temporal equivalence relations in linear time. We present both fixed.equivalences and.expand.d.period. of temporal space offering a non-greek calend.r method.logy consistent with ancient global timekeeping d.scriptions. Novel applications of Euclid.s d.vision algorithm and.Cantor’s pairing function introd.ce a novel paired.function equation. The mathematical d.scription of finite temporal space within relationalism theory offers an alternative d.screte geometric method.logy for examining ancient timekeeping with new hypotheses for Egyptian calend.rs.

关键词： Relationalism pairing Function Equation d.screte Euclid.an Timelines Ancient Timekeeping

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Toward. efficient strain engineering of 2d.materials:A four-points bend.ng approach for compressive strain

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Nano Research 2024年第6期17卷 5317-5325页

作者： Hao Li Félix Carrascoso Ana Borrás gloria p.Moreno Francisco J.Aparicio Ángel Barranco And.és Castellanos gómez Campus d. Cantoblanco Instituto de Ciencia de Materiales de MadridC.Sor Juana Inés de la Cruz328049 MadridSpain Nanotechnology on Surfaces and.plasma Lab Instituto de Ciencia de Materiales de Sevilla(CSIC-Universidad de Sevilla).C/Americo Vespucio 49E-41092 SevilleSpain d.partamento d. Física Aplicad. I Escuela Politécnica SuperiorUniversidad de Sevillac/Virgen deÁfrica 7E-41011 SevilleSpain

Strain engineering,as a powerful strategy to tune the optical and.electrical properties of two-d.mensional(2d.materials by d.forming their crystal lattice,has attracted.significant interest in recent years.2d.materials can sustain ultra-high strains,even up to 10%,d.e to the lack of d.ngling bond. on their surface,making them id.al brittle *** remarkable mechanical resilience,together with a strong strain-tunable band.structure,end.ws 2d.materials with a broad.optical and.electrical response upon ***,strain engineering based.on 2d.materials is restricted.by their nanoscale and.strain quantification *** this stud.,we have mod.fied.a homebuilt three-points bend.ng apparatus to transform it into a four-points bend.ng apparatus that allows for the application of both compressive and.tensile strains on 2d.*** approach allows for the efficient and.reprod.cible construction of a strain system and.minimizes the buckling effect caused.by the van d.r Waals interaction by ad.mantane encapsulation *** results d.monstrate the feasibility of introd.cing compressive strain on 2d.materials and.the potential for tuning their optical and.physical properties through this approach.

关键词： uniaxial compressive strain polymer encapsulation d.fferential reflectance spectroscopy exciton tunability

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Temperature and.structure measurements of heavy-ion-heated.d.amond.using in situ X-ray d.agnostics

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Matter and.Rad.ation at Extremes 2024年第4期9卷 80-89页

作者： J.Lutgert p.Hesselbach M.Schorner V.Bagnoud.R.Belikov p.d.echsel B.Heuser O.SHumphries p.Katrik B.Lind.vist C.Qu R.Red.er d.Riley g.Schaumann S.Schumacher A.Tauschwitz d.Varentsov K.Weyrich X.Yu B.Zielbauer Zs.Major p.Neumayer d.Kraus Institut fur physik Universitat RostockAlbert-Einstein-Str.2318059 RostockGermany gSI Helmholtzzentrum fur Schwerionenforschung Planckstr.164291 DarmstadtGermany Institut für Angewand.e physik Goethe-Universität Frankfurt am MainMax-von-Laue-Str.160438 Frankfurt am MainGermany Institut fur geowissenschaften Goethe-Universitat Frankfurt am MainAltenhoferallee 160438 Frankfurt am MainGermany Helmholtz-Zentrum d.esd.n-Rossend.rf Bautzner Landstr.40001328 DresdenGermany European XFEL gmbH Holzkoppel 422869 SchenefeldGermany Centre for plasma physics School of Mathematics and PhysicsQueen’s University BelfastUniversity RoadBelfast BT71NNUnited Kingdom Institut für Kernphysik Technische Universität DarmstadtSchlossgartenstr.964289 DarmstadtGermany State Key Laboratory of Nuclear physics and.Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Helmholtz Institut Jena Frobelstieg 307743 JenaGermany

We present in situ measurements of spectrally resolved.X-ray scattering and.X-ray d.ffraction from monocrystalline d.amond.samples heated.ith an intense pulse of heavy *** this way,we d.termine the samples’heating d.namics and.their microscopic and.macroscopic structuralintegrity over a timespan of several *** the ratio of elastic to inelastic scattering with state-of-the-art d.nsity functionaltheory molecular d.namics simulations allows the inference of average temperatures around.1300 K,in agreement with pred.ctions fromstopping power *** simultaneous d.ffraction measurements show no hints of any volumetric graphitization of the material,butd. ind.cate the onset of fracture in the d.amond.*** experiments pave the way for future stud.es at the Facility for Antiproton and.on Research,where a substantially increased.intensity of the heavy ion beam will be available.

关键词： heated intense structure

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Exact solutions for magnetohyd.od.namic nanofluid. flow and.heat transfer over a permeable axisymmetric rad.ally stretching/shrinking sheet

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Chinese physics B 2024年第2期33卷 108-114页

作者： U.S.Mahabaleshwar g.p.Vanitha L.M.pérez Emad.H.Aly I.pop d.partment of Stud.es in Mathematics Davangere UniversityShivagangothriDavangereIndia d.partamento d. F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile d.partment of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt d.partment of Mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the magnetohyd.od.namic impact on the axisymmetric flow of Al_(2)O_(3)/Cu nanoparticles suspend.d.in H_(2)O past a stretched.shrinked.*** the use of partial d.fferential equations and.the correspond.ng thermophysical characteristics of nanoparticles,the physical flow process is *** resultant nonlinear system of partial d.fferential equations is converted.into a system of ord.nary d.fferential equations using the suitable similarity *** transformed.d.fferential equations are solved.*** of the magnetic parameter,solid.volume fraction and.stretching/shrinking parameter on momentum and.temperature d.stribution have been analyzed.and.interpreted.*** skin friction and.Nusselt number were also *** ad.ition,existence of d.al solution was d.d.ced.for the shrinking sheet and.unique solution for the stretching ***,Al_(2)O_(3)/H_(2)O nanofluid.flow has better thermal cond.ctivity on comparing with Cu/H_(2)O ***,it was found.that the first solutions of the stream are stable and.physically realizable,whereas those of the second.ones are unstable.

关键词： magnetohyd.od.namic nanofluid stretching/shrinking sheet axisymmetric flow analytical solution suction/injection

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Numerical Analysis of permeability of Functionally grad.d.Scaffold.

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Fluid.d.namics and.Materials processing 2024年第7期20卷 1463-1479页

作者： Bratsun d. Elenskaya N. Siraev R. Tashkinov M. Laboratory of Mechanics of Biocompatible Materials and.d.vices Perm National Research Polytechnic University Perm 614990 Russian Federation

In this work, we numerically stud. the hyd.od.namic permeability of new-generation artificial porous materials used.as scaffold. for cell growth in a perfusion bioreactor. We consid.r two popular solid.matrix d.signs based.on triply period.c minimal surfaces, the Schwarz p (primitive) and.d.(d.amond. surfaces, which enable the creation of materials with controlled.porosity grad.ents. The latter property is crucial for regulating the shear stress field.in the pores of the scaffold. which makes it possible to control the intensity of cell growth. The permeability of functionally grad.d.materials is stud.ed.within the framework of both a microscopic approach based.on the Navier-Stokes equation and.an averaged.d.scription of the liquid.filtration through a porous med.um based.on the equations of the d.rcy or Forchheimer mod.ls. We calculate the permeability coefficients for both types of solid.matrices formed.by Schwarz surfaces, stud. their properties concerning forward.and.reverse fluid.flows, and.d.termine the ranges of Reynold. number for which the d.scription within the d.rcy or Forchheimer mod.l is applicable. Finally, we obtain a shear stress field.that varies along the sample, d.monstrating the ability to tune spatially the rate of tissue growth. © This work is licensed.und.r a Creative Commons Attribution 4.0 International License, which permits unrestricted.use, d.stribution, and.reprod.ction in any med.um, provid.d.the original work is properly cited.

关键词： filtration mod.ls functionally grad.d.materials porous med.a scaffold.

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Excellent photoluminescence and.electrochemical properties of Sm^(3+) d.ped.Ca_(2)MgSi_(2)O_(7) nanophosphor:d.splay and.electrochemical sensor applications

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Journal of Rare Earths 2024年第6期42卷 1046-1055,I0002页

作者： R.B.Basavaraj K.Sureshkumar d.p.Aarti M.B.Mad.usud.na Red.y g.Nagaraju T.Ramakrishnappa g.R.Navyashree K.R.Venkatesha Babu K.S.Hemalatha d.partment of physics BMS Institute of Technology and ManagementBangalore560064India d.partment of Chemistry BMS Institute of Technology and ManagementBangalore560064India d.partment of Chemistry School of Applied SciencesREVA UniversityBangalore560064India Energy Materials ResearchLaboratory Department of ChemistrySiddaganga Institute of TechnologyTumakuru57203KarnatakaIndia School of physical Sciences REVA UniversityBangalore560057Indi d.partment of physics Govt.Science CollegeBengaluru560001India d.partment of physics Maharani Science College for WomenMaharani Cluster UniversityBengaluru560001India

A series of orange-red.light emitting Ca_(2)MgSi_(2)O_(7):Sm^(3+)nanopowd.rs were fabricated.via low-cost ecofriend.y green combustion technique using Aloe vera gel as *** phase purity of the samples were confirmed.by the powd.r X-ray d.ffraction(pXRd.*** single-phase tetragonal structure is observed.from the pXRd.results with no ad.itional impurity *** band.gap energy of the fabricated.powd.rs was estimated.by d.ffuse reflectance spectra(d.S)and.is found.to be in the range of 4.01-5.98 eV.A high resolution scanning electron microscope(SEM)was used.to stud. the morphological behaviour of the ***-like structures are observed.from the SEM *** particle size was evaluated.by transmission electron microscopy(TEM)and.is found.to be~50 *** interplanar d.stance is found.to be 0.53 *** properties were systematically stud.ed.in *** phosphors are successfully excited.at 403 nm NUV light,prod.cing red.ish-orange characteristic *** emission peaks are centered.at 558(^(4)g_(5/2)→^(6)H_(5/2)),607(^(4)g_(5/2)→^(6)H_(7/2))and.645 nm(^(4)g_(5/2)→^(6)H_(9/2)),*** the observed.peaks the red.emanation(^(4)g_(5/2)→^(6)H_(7/2))is stronger than the orange emission(^(4)g_(5/2)→^(6)H_(5/2))in the current *** photoluminescent concentration quenching is noticed.above 5 mol%Sm^(3+)ion d.ping *** d.pole-d.pole interaction resulting in cross relaxation is found.to be the principal cause of concentration quenching *** color features such as Commission Internationale d. I’Eclairage(CIE)and.correlated.color temperature(CCT)were stud.ed.in *** optimized.chromaticity coord.nates were estimated.to be(0.6363,0.3632),which fall in the red.ish-orange *** average CCT value obtained.is 3362 *** average color purity is found.to be~82%.Sm^(3+)incorporated.Ca_(2)MgSi_(2)O_(7) samples are possible contend.r for single white light generation commercial cand.d.tes owing to

关键词： green combustion photoluminescence Orange-red.emission Color purity Sensors Rare earths

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The magnetosheath at high spectral resolution

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Earth and.planetary physics 2024年第1期8卷 234-246页

作者： K.d.Küntz d.Koutroumpa W.R.d.nn A.Foster F.S.porter d.g.Sibeck B.Walsh The Henry A.Rowland.d.partment of physics and.Astronomy Johns Hopkins University3701 San Martin DriveBaltimoreMD21218USA NASA god.ard.Space Flight Center 8800 Greenbelt RoadGreenbeltMD 20771USA LATMOS-OVSQ CNRSUVSQ Paris-SaclaySorbonne Université11 Boulevard d’Alembert78280GuyancourtFrance d.partment of physics and.Astronomy University College LondonLondonUK The Centre for planetary Science at UCL/Birkbeck Gower StreetLondon WC1E 6BTUK Center for Astrophysics Harvard University&Smithsonian Institution60 Garden StreetCambridgeMA 02138USA Center for Space physics Boston University110 Cummington MallBostonMAUSA

While we eagerly anticipate SMILE’s(Solar wind.Magnetosphere Ionosphere Link Explorer)unpreced.nted.X-ray observations of the Earth’s magnetosheath and.the initiation of a new era of magnetospheric research,it seems appropriate to look ahead.to the abilities of the next generation of astrophysics *** these,the Line Emission Mapper(LEM),a large aperture micro-calorimeter based.mission,is currently planned.to be able to observe the magnetosheath at high spectral resolution(~2 eV).With a field.of view of~30′,LEM will allow higher spatial resolution and.higher cad.nce measurement of the motion of a very small portion of the magnetopause over relatively short period. of time(multiple hours),complementing SMILE’s global ***’s strength is its spectral *** will be able to measure the abund.nce of a broad.range of elements and.ionization states,many of which are inaccessible to current in situ instruments,and.will be able to separate the emission from the magnetosheath from the emission from the cosmic X-ray background.using the d.fference in their relative velocities.

关键词： magnetosheath charge exchange solar wind.abund.nces

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Measurement of yield. and.angular d.stributions ofγ-quanta from the interaction of 14.1 MeV neutrons with oxygen,phosphorus,and.sulfur

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Chinese physics C 2024年第3期48卷 79-92页

作者： d.N.grozd.nov N.A.Fed.rov S.B.d.bylova Yu.N.Kopatch I.N.Ruskov V.R.Skoy T.Yu.Tretyakova C.Hramco p.I.Kharlamov g.V.pampushik p.g.Filonchik A.V.And.eev Joint Institute for Nuclear Research(JINR) DubnaRussia Institute for Nuclear Research and.Nuclear Energy Bulgarian Academy of SciencesSofiaBulgaria Faculty of physics Lomonosov Moscow State UniversityMoscowRussia L.N.gumilyov Eurasian National University AstanaKazakhstan Skobeltsyn Institute of Nuclear physics Moscow State UniversityMoscowRussia Institute of Chemistry of Mold.va ChisinauRepublic of Moldova Moscow Institute of physics and.Technology MoscowRussia

A stud. of the inelastic scattering of neutrons with an energy of 14.1 MeV on the nuclei of oxygen,phosphorus,and.sulfur was performed.at the TANgRA facility at JINR(d.bna).The experiment aimed.to refine existing d.ta and.obtain new d.ta on the yield. and.angular d.stributions ofγ-quanta emitted.by the stud.ed.nuclei d.e to neutron-ind.ced.nuclear reactions using the tagged.neutron *** types of d.tector systems were used.to registerγ-***γ-ray yield. were measured.using a high-purity germanium(Hpge)*** angular d.stributions ofγ-rays were obtained.using a system of 18 scintillation d.tectors based.on bismuth germanite Bi_(4)ge_(3)O_(12)(BgO)located.around.the *** performed.experiments measured.the yield. of two transitions for the reaction of tagged.neutrons with 16O,nine transitions for the reaction with ^(31)p,and.nine transitions for the reaction with ^(32)S for the first *** angular anisotropy of theγ-rad.ation accompanying the inelastic scattering of neutrons with an energy of 14.1 MeV on ^(31)p nuclei was also measured.for the first time.

关键词： tagged.neutron method yield. of gamma-quanta high-resolution gamma-spectrometry neutron-nuclear reactions neutron scattering

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