β-Decay Half-Life of the rp-Process Waiting Point Nuclide 84MoRp过程等待点核素84Mo的衰变半衰期

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1、β-DecayHalf-Lifeoftherp-ProcessWaitingPointNuclide84MoJ.B.Stoker1,2,P.F.Mantica1,2,D.Bazin2,A.Becerril2,3,4,J.S.Berryman1,2,H.L.Crawford1,2,A.Estrade2,3,4,C.J.Guess2,3,4,G.W.Hitt2,3,4,G.Lorusso2,3,4,M.Matos2,4,K.Minamisono2,F.Montes2,4,J.Pereira2,G.Perdikakis2,H.

2、Schatz2,3,4,K.Smith2,3,4,R.G.T.Zegers2,3,4(1)DepartmentofChemistry,MichiganStateUniversity,EastLansing,Michigan48824(2)NationalSuperconductingCyclotronLaboratory,MichiganStateUniversity,EastLansing,Michigan48824(3)DepartmentofPhysicsandAstronomy,MichiganStateUniv

3、ersity,EastLansing,Michigan48824and(4)JointInstituteforNuclearAstrophysics,MichiganStateUniversity,EastLansing,Michigan48824(Dated:June30,2018)84Ahalf-lifeof2.2±0.2shasbeendeducedfortheground-stateβdecayofMo,morethan1σ84shorterthanthepreviouslyadoptedvalue.Moisan

4、even-evenN=Znucleuslyingontheprotondripline,createdduringexplosivehydrogenburninginTypeIX-rayburstsintherapidprotoncapture(rp)process.Theeffectofthemeasuredhalf-lifeonrp-processreactionflowisexplored.84ImplicationsontheoreticaltreatmentsofnucleardeformationinMoarea

5、lsodiscussed.I.INTRODUCTIONthemodelingofX-raybursts.Nevertheless,theamountofejectedmaterialisstillbeingdebatedandthecompo-sitionofmaterialproducedinanrp-processeventreliesA.TheAstrophysicalrp-Processonexperimentaldata,andininstanceswherethesedataarelacking,nuclea

6、rstructuremodels[6].Thehalf-lifeofThepresentmodelfortherp-processbeginswiththe84Moisanecessaryexperimentalparameterformodelingaccretionofhydrogenandheliumrichmatterontoneu-reactionflowabovemass84,anddirectlydeterminesthetronstarsfromnearbycompanionstars.Gravitatio

7、nalamountof84SrformedduringX-raybursts.energyisreleasedintheformofX-raysasmatterreachestheintimateregionsoftheneutronstar.Thematteriscompressedasitformsanaccretiondiskandtrav-B.ShapeDeformationAlongN=Zelsthroughthegravitationalfieldgradienttowardstheneutronstar,wh

8、icheventuallyresultsinthermonuclearburning.Therp-processisasequenceof(p,γ)reactionsDeformednucleiingeneralexhibitdifferentsingle-andsubsequentβ+decaysupto107,10