12718.基于相空間方法研究nd崩裂反應的雙微分截面

1、基于相空間方法研究nd崩裂反應的雙微分截面專業(yè)名稱：粒子物理與原子核物理申請人：曾昭林指導教師：孫小軍教授論文答辯委員會主席：至童墅邀≥旌密主席：篆童墅：區(qū)務唧委員：鄹繕盞釜獨Calculationofdoubledi舶rentialcrosssectionfornd●●■一lDreaKUpreaCtlonDasen0nDnaseSPaceinetriOcIZhaolinZengSupervisor：ProfXiaoJunSunDepa

2、rtmentofPhysics，GuangxiNormalUniversityGuilin541004AbstractThestudyoffew—bodynuclearreactionplaysasignificantroleininvestigatingthestructureoflightnuclei，themechanismofnuclearreactionandthenatureofnuclearforceWhilendthre

3、ebodybreakupreactionisoneoftheuniquefewbodynuclearreactionsandanimportantmeansofstudyingnucleon—nucleoninteractionandthreenucleonforcesInaddition，thedouble—differentialneutroncrosssectionofndthreebodybreak—upreactionisfr

4、omthereactionchannelsofelasticscatteringandthree—bodybreakup，thedataofwhichisabletobeextractedexperimentallyBasedonthephasespacetheoreticalmethodforfewbodynuclearreactionwithuniformmomentumdistribution，thispaperdoesacert

5、ainamountofworkonaspectsofnonuni—formmomentumdistributionandanisotropyincenter—ofmassframeForthenonuniformmomentumdistribution寶111reeformsofmomentumdistributionfunctionincludingdecayingform，gaussian—likeformandgaussianfo

6、rmareproposedandforeachform，formulascalculatingdouble—differentialcrosssectionofthreebodybreakupreactionarededuced。Thecalculationsfordoubledifferentialneutroncrosssectionfromdeuteronbreakupbyabout14MeVneutronisperformedt

7、hroughtheaboveformulasandthetheoreticalresultsarecomparedwiththeexperimentalvaluesfromdifferentliteratures，whichshowsthatthecalculatedresultsonbasisofdecayingformarenotgoodasthatofgaussian—likeformandgaussianformandcalcu

8、lationsonbasisofthelattertwomomentumdistributionsa—greetosomedegreeswiththeexperimentaldatainsmallanglesbutnotagreedwellnearthe1TlaximumoutgoingenergyBesides，forthelargerangles，thecalculatedresultsarealsonotagreedwellwit

9、htheexperimentaldataThus，wefurthertakeintoaccounttheanisotropyandtheanglerelationinformoflegendrepolynomialexpansionisaddedintothedoubledifferentialcrosssectionincenterofmassAfterconsideringthisanglerelation，thetheoretic