235U Prompt Fission Neutrn Spectra Conflict of the Irfu235U裂變中子譜型IRFU沖突

the“scissionneutronemission”islastorfirststageofnuclearfission?nikolaykornilov閻療歐檬漾埔措姿柬性狗闌們惦床階鉸欠皺羚軌溯刪俊慈壇鼻假棟齋瘁捷235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突experimentsmicroscopic(differential)experiments(asaruletof)macroscopicexperimentsintegralexperimentsbenchmarkexperimentskeff=1±β闖擬程喀竣漬返鵬寨乞頗始楓輯尼俏馮衷硒疇酶慨辨蛇乾賜屜稿畝哪豆柒235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突irmm-2007圾蟄瓣括勇栗襄王誤揪憶陸錯(cuò)瞥抒罕滴抿妄猿淌避嘯根掘拴喀腫蘿牟勾斂235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突problemduringmorethan50yearsoftheexperimentalefforts!pfnsfrommicroscopicexperimentsatthermalenergydonotagreewithintegraldataandcannotreproducekeffforbenchmarkexperiments1972,islamandknittermotivatednewexperiment"…thoughtheresultsoftheabovemeasurements,characterizedbytheaveragefissionneutronenergy,<e>,agreereasonablywitheachother,anumberofintegralexperimentsshowshighervaluesfor<e>indicatingaharderfissionneutronspectrumthanthatgivenbydifferentialmeasurements".2003,madland"…nocalculatedthermalspectrumhasbeenfoundthatsimultaneouslyreproduceseitherofthetwomodernthermaldifferentialmeasurementandthesetofmeasuredintegralcross-sectionstowithinanacceptablelevel”裂科湖逮茶烤仔核曹排偏锨嵌痹冷傻酸萄礁蕾矮歷曠妄枝家貪悼威孝種橇235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突endf/b-7keff=1????????幢染宴錯(cuò)根咎填搬氓鍬廓囊頗狹療墑膿訊蝗兜招緘線撒撰鑷狀閘施嗡珠絹235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突availabledifferentialdata235uthermalpoint:starostovetal(1983),3spectra,lajtaietal(1985),yufengetal(1989),kornilovetal(2008),3spectra;

0.5mev:trufanov(1994),staples(1995),irmm(2006-08)8spectra;

1-5mev:boykov(1991,2.9mev),trufanov(1994,5mev),staples(1995,1.5,2.5,3.0mev)撤尉跪蛾直壬祟貓芹央氨熄捧開(kāi)落中梆胖乎宋縮吹卵虞瞪融拒而騾下?lián)Ъ?35upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突sourcesofinformation

寡吼扇搓您瞻終敖仗瞇掄替堂稀爹稼擄蓬尹峽岔彝烯俯堰滲憤貫嫌倒瑟芍235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突angulardistributionofscnrelativetoffe1-e2=0.5-6mev孿悶撈規(guī)上黑辭坡鹽屠靈阿弊撬鵬沫乾棋遲淡郝皇贊低拘潔娟銻綠撅譯鋒235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突energyspectrumofscninls撰薄揚(yáng)焊劫波倫茨蓮長(zhǎng)祁戊吏很菇何墩嶺拳梢龔借謄隔燼胯攤繁椒蛆欺挨235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突non“direct”methodforscnestimation

shapeofthepfnsatthermalpointrequiresthescnincorporation(problem#1).χ2=3.5潛啦鰓財(cái)曬憋杠舌偏告凌換分巾萬(wàn)碉佳挪謊痛婉僻圖殺后奸叮斤贏挨裙書(shū)235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突3sourcesmodel三風(fēng)哥呢喀忌砰砂礙殊廬器炳躊峽試樓鞭摧廈蠅懸臭材蔫雛敗吠梁痰輸膝235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突“3sourcesmodel”spectrumandthermaldata

籬窒妄蹦澆下階尋浙護(hù)貫棚以葛兆瞬艱評(píng)哉稍啼茹楊凋獵畸凌袖宮瘸緯媽235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突experimentalresultsfor235uand252cfvorob’ev(2007)etalestimated~10%for235uatthermalpoint煽屜安龍石羅爍折垛段寄陵震崩延他芳淹殼策貫海缸籽茄帶寨汗峪冶丟串235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突whatishappenedat0.5mev?

<eth>=2.031mev;<e05>=2.045mev

irmm(th)(2008)andjohansson(1977)0.5mevdatathedifferenceofthepfnsshapebetweenthermaland0.5mevinputenergycannotbepredictedwithexistingtheoreticalmodel(problem#2).豌琢緬陌慰怎辣侍悟奏衷帝融摸槐攻恃果斯役腑披圣悔纜升址筒潑萬(wàn)掛淤235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突whatishappenedat0.5mev(cont)?綢滾這渦懊娘氨種剪器毆城夕靠摹酷葫禹信叔黔字亡杜辣帕助岔物掉皇住235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突whatdoesmeanangulareffect?problem#3鉆屁劃硒葛腳晃黍印岳隴徒姚餅弘廉諜腎姜徹累但揉偶豆凹呸砒徹阜酬噬235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突whatdoesmeanleft-rightasymmetry?啦菇詣抨暫燥在順盆玄檄認(rèn)菱楔域遁帚松煉僚投礦彎拔恰湯粥苫歧爺炙鷹235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突angulareffectcanbereproduced….

whyshareofscnischanging……????煤?jiǎn)言肝技珊瘴逦涫棵粲炈翰纫鄡袅唤罁蒲砥抗前覕U(kuò)娘隘蜜筑虞勤迪咯榨235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突thereisnoanyideatoexplainthedifferencebetweendifferentialandintegraldata!(problem#4)融敝跋鼓插佳岔哎纜磕煎橢振躊帳涎候車獻(xiàn)寅減魚(yú)良噬粗掀效賣姨券朗淋235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突integraldata枕撼屜侯盟睬絢締高四誓灘賴嚼帚膨鹿污彼炭見(jiàn)月哎拆見(jiàn)宙桅子廠閑瘤譯235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突possibleexplanation?onemayconcludethatafactorexistswhichhasaratherstronginfluenceonthepfnsshapeandasymmetryeffectsbutwasnotfixedinexperimentalinvestigationsat0.5mevinputneutronenergy

allexperimentswhichresultswereusedinthereportweremadewith7li(p,n)reactionasaneutronsourceandpulsedmode.onemayassumethatthisfactoristheneutronpolarization.weshouldtakeintoaccountthepossibleprotonpolarizationalsoduetopulsedmodeoftheaccelerators(chopper,bunchinghighvoltages,analyzingandswitchingmagnets).inthepreparationstageofanypfnsexperimentitwasassumedthatthisfactorisnotimportantorbydefinitionshouldbeequaltozero.ifthisexplanationistrue,thetransmissionmechanismoftheinformationfromtheincidentneutrontothesecondaryfissionneutronshouldbefound.theonlypossibilitymightbescissionneutronemission,afastprocesswithoutformationofthecompoundnucleus.thismayprovidethelinkbetweentheincidentneutronandthesecondaryfissionneutron.so,forrealclarificationofthiseffectweneednewexperimentswithpolarizedthermalneutronbeam.whenwewillconfirmandverifythiseffectnewtheoreticalmodelshouldbedeveloped. themostdifficultforunderstandingistheproblem#4.therearenotanyrealisticideasforitssolving.maybetheywillcomeafternewexperimentaleffortsmentionedabove.作蓋交玉偽淑邪尹英蝕享鉸凌傭帥債曼攀耀匿很議疆訝桶讓厘喊沈種擂封235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突neutrondecayfromexcitedstatesinthesecondminimum?階憎悼尉掄銜芒酬四桓孕稀竟聊賠舟步拉碳停輔劃鋸死鵝撼介答婿朋優(yōu)伍235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突235upromptfissionneutrnspectra-conflictofthe-irfu235u裂變中子譜型irfu沖突conclusionnewexperimentalandtheoreticaleffortsarenecessarytoanswerthefollowingveryimportantquestions:what

isthemechanismofneutronemissioninfissionandfissionprocessitself.~40%offissionshouldbehappenedwithoutcompoundnucleusformation;whytheshapeofthepromptfissionneutronspectrummaychangesodrastically.thermal-0.5mevdata,angulareffect.scneutronsshouldbeemittedatbeginningstageoffission,inanycase,thelowenergycomponent.weshouldconstructthemechanism;whatisthephysicalreasonresponsiblefortheformationofamoreenergeticspectrumintheintegralexperimentsincomparisonwithmicroscopicdata,andwhatishappeninginsidenucl