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1、Ú26íÚ12ÚßÜïíëËïíVol.26,No.122002ê12ÂHIGHENERGYPEWSICSANDNOCLEARPHYSICSDee..2ÖnHigh-SpinStatesoftheNeutron-RichNucleus125SbÛLIUZhonglZHANGY12¤HõMAYingJudY.S@saki2K.YamadazH.Oshin1óS.YokoedM.IshizukdT.komatsubara2K.Fumnoz1(IZEStiutedModernphysics-meChine-eAcademydscience-,Ianzh
2、012730©Ú,CEEina)2(InstitutedmnAesmdTmdmAreel-mwcmtö'1hiveMtydTSEalEuba,Ibar-ki30,£Ø6.Japan)Ab¦,ctHighspinÄôdmsbhavebeeninveç,±çtbeSEøtimebymamofin-beamÃ-mygpecmäopytechniquesviattEeIMSn(7U.£2n)macuona32MeVbeamenergy.BÃedonthemmaun-menuofÃ.ÃcoincidenceandÃ-rayanmtopie-,alevels
3、chemeincluding21newÃ-MEmitionsand14newexcitedlevelswasestablishedupØ23/2¤-11uÉeisomer-atló70.211Oand2471keVlevelshavebeenidentiÔedandpmFeedÃthree¬quasipadicleq?Ñ(1SEMIn),ÐgmÍ(halmdzÑandq7¨(lziBrJconi1811rations-Etspectively.Ç1elevelsuuctumofmSbisdiscussedintermsofpanicle-comc
4、ou-pling.KeywordsiEI-beamÃ-myspec»OSCOPY-isomer-P®Etide-coÓ£OE×lingSpectmscopicstudiesofthehigh-spinstatesinodd-ASbiótopeshaverevealedcompletelydif-femtexcitationmodes.htheheavierSbiê£pegwithAzz127,singlepaøcleexcitationsmani-fest,andisomemorigElatedfromeouPIingtheoddpMmandtw
5、o-quasineutmnj,7-,10+iso-meEtcstatesoftheevenSncomsweÓidemfleu-3].Whileinthelidzterisotope8÷×Ag121,AI=lcollectivemtatiOZEalbandsbuiltong912pmton-holeintmderstateshavebeensystemaucallyobmwed[4úl.ThenuclemlnSbislocatedinbetween,itisofintermttoinvestigatethepmpeEtyofiuhighµinstm
6、ctm.sofar,availableinformationconcerningiustmetuÓcomesonlyfmmpde-cayandlight-ion(p,d,t,3He)inducedÓactions{71Inthisletterwepmsentthefimtidentinea-tionofhighspinstatesinthisneutm1¤richnucleusbymeansdin-beamY-myspectmscopytech-nIq11es.Theexperimentwaspezformedmthhbeamb£ýaMmgmen
7、richedself-suppoEbg4nWcmzthick124SnmetdlicfoilatthetandemacceleratorlaboratOE7intheIjnivemityofTSEEkuba,Japan.AY-mydetectorarmyconsistingof9BG0¤Compton-SEEppmsmdGedetectorswasusedforY-mydetec-tion.FiveGedetectomweÓplacedat370andtheothemnear90OMthmspecttothebeamdimetionóthatth
8、eADOratios(AngularDistributionsofy-mysde-excitingtheOEtentedstates)c