学科分类
/ 1
14 个结果
  • 简介:Rotation in Reaction 19F+51VRotationinReaction19F+51V¥WangQi;LuJun;XuHushan;LiSonglin;ZhuYongtaiandZhangYuhuIndLssi...

  • 标签:
  • 简介:留声机诞生于1877年.世界上第一个发明留声机的人就是誉满全球的发明大王——爱迪生.当时爱迪生发明的留声机轰动了整个纽约,各家报馆的新闻记者,像潮水般地涌来报道这一特大新闻.“一台会说话的机器”“一台会收藏声音的机器”,激起当时社会急速而巨大的狂热,外界舆论把留声机称之为19世纪的奇迹,即将开幕的巴黎世界博览会立即把它作为时新展品展出,就连当时美国总统海斯也在留声机旁转了两个多小时.

  • 标签: 留声机 发明 世界博览会 新闻记者 美国总统 爱迪生
  • 简介:合成了六铝酸盐SrNiAl11O19并用XRD、UVDRS、TGDTA和TEM等技术对其进行了表征。在750℃于SrNiAl11O19上进行的甲烷与二氧化碳重整反应表明,这类催化剂较Ni/SrAl12O19具有较大活性和低积碳能力,在催化反应过程中可有效地抑制Ni颗粒的增大。

  • 标签: 六铝酸盐甲烷重整Ni催化剂
  • 简介:Thebaryonspectrumandthebaryoncouplingsaretwoofthemostimportantissuesinhadronicphysicsandtheyareattractingmuchattention.Bothontheexperimentalandtheoreticalsides,thenucleonexcitedstatesbelow2.0GeVhavebeenextensivelystudied[1].However,thecurrentinformationforthepropertiesofstatesaroundorabove2.0GeVisscarce.Ontheotherhand,inthisenergyregion,manytheoreticalapproacheshavepredictedmissingNstates,whichhavenotbeensofarobserved.Hence,thestudyofthepossibleroleplayedbythe2.0GeVregionnucleonresonancesintheavailableaccuratedataistimelyandcouldshedlightintothecomplicateddynamicsthatgovernsthehighexcitednucleonspectrum.

  • 标签: PHOTON HADRONIC Productions
  • 简介:LECR4isthefirstECRionsourceusingevaporativecoolingtechnologyintheworld.Itsuniquefeatureisthatthesolenoidsweremadefromsolidsquarecopperwires(3.32mm×5.77mmwithinsulation),andthatallthecoilsareentirelyimmersedintheroomtemperaturecoolant.Thecoilscanproduceamaximumaxialmagneticfieldupto2.5T.LECR4aimstoprovideintensemultiplechargestateionbeamsforSSC-Linacproject-anewLinearinjectorfortheSeparatedSectorCyclotron(SSC).Presently,someionbeamswithdifferentM/QratiohavebeenacceleratedsuccessfullywiththeRFQandDTL,suchas200eμAof16O^5+,200eμAof40Ar^8+,50eμAof209Bi^30+etc.ThemeasuredtransmissionefficiencyofRFQisupto90%.ThelayoutofLECR4ionsourceandtheLEBTisshowninFig.1.

  • 标签:
  • 简介:Takingadvantageofthelargeγ-detectorarrayGammasphereandtherecoilmassseparatorFMA,highspinstatesin117Bawereinvestigatedthroughtherecoil-β-delayedprotondecaytaggingtechniqueviatheheavy-ioninducedfusion-evaporationreaction64Zn(58Ni,2p3n)117Ba,atabeamenergyof305MeV.Promptγraysbelongingto117Bahavebeenidentifiedfurthermore,arotationalbandhasbeenidentifiedforthefirsttimeandpresentedasbandAinFig.1.

  • 标签: ADVANTAGE FMA VIA HAS
  • 简介:Nanowireshaveattractedmoreandmoreinterestinrecentyearsduetotheiruniquepropertiescomparedtobulkmaterials[1].Thequitedifferentpropertiespossessedbynanowiresaremainlycausedbytheirhighsurface-tovolumeratio[2].Behaviorsofnanowiresunderirradiationconditionshavealsoattractedintensiveattentionintheseyears[3??5].Ithasbeenproposedthatnanowiresmayberadiationresistancebecausetheirlargesurface-to-volumeratio,andmeanwhilethesurfacearetheperfectsinksfordefectscreatedintheradiationprocess[3].

  • 标签: Molecular Dynamics STUDY
  • 简介:AngulardistributionsoffragmentsB,C,N,O,F,Ne,Na,MgandAlinducedbythecollisionof^19F+^27Alat114MeVhavebeenmeasured.Angulardispersionparametersareextractedfromtheexperimentaldataandcomparedwiththetheoreticalones.ThedynamicdispersionsfordissipativeproductsdependstronglyonthechargenumberZofthefragments.

  • 标签: 重离子碰撞 角分布参数 角散射 氟离子 铝离子 原子核物理
  • 简介:近日,marketsandmarkets发布了一份新的市场报告,题为“2013-2018年光学成像技术市场报告一光学相干断层扫描、光声层析成像、超光谱图像和近红外光谱技术在临床诊断、临床研究和生命科学领域的技术发展趋势和市场前景分析”。该报告预测,光学成像技术的市场大约从2012年的9.16亿美元,到2018年预计可达到的19亿美元,并且从2013年到2018年期间的市场年均复合增长率可达11.38%。该报告还指出美国是主要的光学成像设备市场,其次是欧洲。未来,亚太和中东这些新兴经济体将是这个市场的驱动力。

  • 标签: 技术市场 光学成像 近红外光谱技术 光声层析成像 市场前景分析 技术发展趋势
  • 简介:Wereportfemtosecondpulsegenerationinanamplifiersimilaritonoscillatorandaprechirpedfiberamplifiersystem.Thefinaloutputpoweris1.4W,andthefundamentalrepetitionrateis19.1MHzafterasinglestatefiberamplifier.Thepulsewidthis109fs.

  • 标签: