检索结果-南通市图书馆

Direct mea.urement of the brea.-out ^(19)F(p,γ)^(20)Ne rea.tion in the China.Jinping underground la.ora.ory(CJPL)

在线全文

学校读者我要写书评

暂无评论

Nuclea. Science a.d Techniques 2024年第8期35卷 142-152页

作者： Yin‑Ji Chen Ha. Zha.g Li‑Yong Zha.g Jia.‑Jun He Richa.d Ja.es deBoer Micha.l Wiescher a.exa.der heger Da.id Ka.l Jun Su Da.iel Odell Xin‑Yue Li Jia.‑Guo Wa.g Long Zha.g Fu‑Qia.g Ca. Zhi‑Cheng Zha.g Xin‑Zhi Jia.g Luo‑Hua. Wa.g Zi‑Ming Li Lu‑Ya.g Song Lia.g‑Ting Sun Qi Wu Jia.Qing Li Ba.‑Qun Cui Li‑Hua.Chen Rui‑Ga.g Ma.Er‑Ta. Li Ga.g Lia. Ya.‑De Sheng Zhi‑Hong Li Bing Guo Wei‑Ping Liu Key La.ora.ory of Bea. Technology of the Ministry of Educa.ion College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Depa.tment of Physics a.d a.tronomy The Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics a.d a.tronomy Monash UniversityClaytonVIC 3800Australia Fa.ility for Ra.e Isotope Bea.s Michigan State UniversityEast LansingMI 48824USA Institute of Nuclea. a.d Pa.ticle Physics a.d Depa.tment of Physics a.d a.tronomy Ohio UniversityAthensOH 45701USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China China.Institute of a.omic Energy Beijing 102413China College of Physics a.d Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Nuclea. Science a.d Technology University of Chinese Academy of SciencesBeijing 100049China College of Science Southern University of Science and TechnologyShenzhen 518055China Institute of Ra.ia.ion Technology Beijing Academy of Science and TechnologyBeijing 100875China Key La.ora.ory of Nuclea. Physics a.d Ion‑Bea. a.plica.ion(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Ma.hema.ics a.d Physics Handan UniversityHandan 056005China

Ca.cium production a.d the stella. evolution of first-genera.ion sta.s rema.n fa.cina.ing mysteries in *** one possible nucleosynthesis scena.io,brea.-out from the hot ca.bon–nitrogen–oxygen(HCNO)cycle wa. thought to be the source of the ca.cium observed in these oldest ***,a.cording to the stella. modeling,a.nea.ly tenfold increa.e in the thermonuclea. ra.e ra.io of the brea.-out ^(19)F(p,γ)^(20) Ne rea.tion with respect to the competing ^(19)F(p,α)^(16) O ba.k-processing rea.tion is required to reproduce the observed ca.cium *** performed a.direct mea.urement of this brea.-out rea.tion a. the China.Jinping underground *** mea.urement wa. performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-ma.s *** key resona.ce wa. observed a. 225.2 keV for the first *** a.tempera.ure of a.proxima.ely 0.1 GK,this new resona.ce enha.ced the thermonuclea. ^(19)F(p,γ)^(20) Ne ra.e by up to a.fa.tor of≈7.4,compa.ed with the previously recommended Na.RE *** is of pa.ticula. interest to the study of the evolution of the first sta.s a.d implies a.stronger brea.down in their“wa.m”CNO cycle through the ^(19)F(p,γ)^(20) Ne rea.tion tha. previously *** brea.-out resulted in the production of the ca.cium observed in the oldest sta.s,enha.cing our understa.ding of the evolution of the first sta.s.

关键词： Nuclea. a.trophysics First sta.s a.unda.ce of ca.cium Rea.tion cross section Rea.tion ra.e China.Jinping underground la.ora.ory(CJPL) JUNA

Kerogen Kinetic Distributions a.d Simula.ions Provide Insights into Petroleum Tra.sforma.ion Fra.tion (TF) Profiles of Orga.ic-Rich Sha.es

在线全文

学校读者我要写书评

暂无评论

Journa. of Ea.th Science 2024年第3期35卷 747-757页

作者： Da.id a.Wood DWa.Energy Limited Lincoln LN59JPUnited Kingdom

Two hundred a.d fifty single first-order a.rhenius rea.tions a.e simula.ed to genera.e S2 pyrogra.s a. three hea.ing ra.es 25,15,a.d 5°C·*** a.tiva.ion energy(E)a.d pre-exponentia. fa.tor(a.of the rea.tions simula.ed follow a.long-esta.lished trend of those va.ia.le va.ues displa.ed by sha.es a.d *** cha.a.teristics of the tra.sforma.ion fra.tion(TF)profiles(product genera.ion window tempera.ures)of the simula.ed single rea.tions a.e compa.ed to the TF profiles of recorded sha.e pyrogra.s genera.ed by multiple rea.tions with different E-a.va.ues lying nea. the defined E-a.*** simila.ities a.d differences a.e observed between the TF profile va.ues of the two *** simila.ities support the sprea. of E-a.va.ues involved in sha.e pyrogra. best *** differences a.e most likely expla.ned by the complexity of the multiple kerogen first-order a.d second-order rea.tions contributing to the recorded sha.e pyrogra.s versus the simplicity a.d crispness of the single first-order rea.tions *** results a.so justify the va.idity of using the previously described“va.ia.le E-a.pyrogra.-fitting method”of multi-hea.ing-ra.e sha.e pyrogra.s ena.ling optimizers to choose multiple rea.tions from a. unlimited ra.ge of E-a.*** contra.t,further doubt is ca.t on the va.idity of the consta.t-a.pyrogra.-fitting method used by the Ea.y%Ro technique,in tha. a.distribution of rea.tions with a.single a.va.ue is unlikely to represent the complex va.iety of kerogen ma.era.s observed in sha.e *** profiles genera.ed by the va.ia.le E-a.pyrogra.-fitting method lie close to the esta.lished E-a.trend a.d a.e likely to provide more rea.istic TF genera.ion window tempera.ures tha. TF profiles genera.ed by the consta.t-a.pyrogra.-fitting method.

关键词： tra.sforma.ion fra.tion profiles simula.ed S2 pyrogra.s multiple hea.ing ra.es kerogen/sha.e kinetics S2 pyrogra. fitting techniques kerogen petroleum resea.ch.

Rodent biology a.d ecologica.ly ba.ed rodent ma.a.ement(EBRM)-25 yea.s of progress through promoting multidisciplina.y resea.ch

在线全文

学校读者我要写书评

暂无评论

Integra.ive Zoology 2024年第1期19卷 2-7页

作者： Gra.t R. SINGLETON Lyn a. HINDS Rhodes Ma.UNDI Steven R. BELMa.N Na.ura. Resources Institute University of Greenwich Kent UK CSIRO Hea.th a.d Biosecurity Canberra ACT Australia a.rica. Centre of Excellence for Innova.ive Rodent Pest Ma.a.ement a.d Biosensor Technology Development Sokoine University of Agriculture Morogoro Tanzania Institute of Pest Ma.a.ement Sokoine University of Agriculture Morogoro Tanzania

“During rodent outbrea. yea.s in ea.tern a.rica.lo-ca.ly,more tha. 80%of the potentia. ha.vest ma. be lost,but even in non-outbrea. periods,rodents ca.se chronic da.a.e to crops….The pest rodent story in a.rica.in-volves severa. species embedded in a.broa. a.d va.ia.le la.dsca.e with highly va.ia.le densities.”(Leirs et a..2010).

关键词： da.a.e crops

First-principles ca.cula.ions to investiga.e structura.,electronic,ma.netic,optica. a.d thermodyna.ic properties of RE_(2)Rh_(3)Ge(RE=Pr,Sm)

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journa. of Ra.e Ea.ths 2024年第7期42卷 1385-1393,I0007页

作者： a.Eza.er R.Ma.rour M.Ha.edoun J.Kha.ba.h a.Rezzouk a.Hourma.a.la. N.Benza.our K.Bouslykha.e La.ora.ory of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this pa.er,we a.a.yzed the physica. cha.a.teristics of the terna.y a.loys RE_(2)Rh_(3)Ge(RE=Pr a.d Sm)using the first principles ca.cula.ion ba.ed on functiona. density theory integra.ed in the Wien2k *** ca.cula.ed forma.ion energies of Pr_(2)Rh_(3)Ge a.d Sm_(2)Rh_(3)Ge a.e−5.3827 a.d−5.2782 eV/a.om,respectively,showing tha. these a.loys ma. exist *** results of the ba.d structure a.d density of sta.es indica.e tha. a.l of the compounds tested a.e ma.netic meta.s,a.d their ma.netism is mostly rela.ed to the contribution of Pr a.d Sm *** tota. ma.netic moments of Pr_(2)Rh_(3)Ge a.d Sm_(2)Rh_(3)Ge a.e 4.07245 a.d 11.16161μB/f.u,*** pa.a.eters such a. hea. ca.a.ity a. consta.t pressure,entropy,Debye tempera.ure,la.tice volume,compressibility coefficients,a.d Grüneisen pa.a.eter a.loys were ca.cula.ed using the Gibbs a.gorithm a.d studied in depth over a.la.ge tempera.ure ra.ge of 0-900 *** Debye tempera.ure increa.es with increa.ing pressure a.d decrea.es with decrea.ing ***,the Debye tempera.ures ca.cula.ed a. p=0 GPa.a.d T=300 K a.e equa. to be 342 a.d 322 K for Pr_(2)Rh_(3)Ge a.d Sm_(2)Rh_(3)Ge,*** optica. cha.a.teristics such a. the rea. a.d ima.ina.y portions of the dielectric function,the a.sorption coefficient,the energy-loss function,a.d the refra.tive index were investiga.ed a.d discussed in more depth.

关键词： Ma.netic meta.s Functiona. density theory Density of sta.es Ma.netic moment Optica. a.d thermodyna.ic properties Ra.e ea.ths