6533b859fe1ef96bd12b8332
RESEARCH PRODUCT
New isomers in $^{125}$Pd$_{79}$ and $^{127}$Pd$_{81}$: Competing proton and neutron excitations in neutron-rich palladium nuclides towards the $N = 82$ shell closure
Gary SimpsonNaohito InabeHirofumi WatanabeG. D. KimChang-bum MoonA. JungclausAyumi YagiMegumi NiikuraToshiyuki SumikamaT. IsobeHiroshi SuzukiToshiyuki KuboHyo Soon JungShunji NishimuraHiroyuki TakedaAtsuko OdaharaJan TaproggeJan TaproggeG. BenzoniF. C. L. CrespiK. YoshinagaH. BabaG. J. LaneGiuseppe LorussoF. BrowneF. G. KondevI. KojouharovGuillaume GeyH.k. WangRoman GernhäuserR. OrlandiZ. H. LiHiroki NishibataAnna WendtH. SchaffnerZs. VajtaZhengyu XuYoung-ki KimYounghun KwonA. Montaner-pizáHiroyoshi SakuraiZena PatelDaiki NishimuraYang SunJin WuK. MoschnerK. SteigerNaoki FukudaD. KamedaZs. PodolyákP. A. SöderströmP. DoornenbalF. NaqviK. Y. ChaeN. Kurzsubject
PhysicsNuclear and High Energy PhysicsIsotopeProton010308 nuclear & particles physicsFissionAstrophysics::High Energy Astrophysical PhenomenaNuclear Theorychemistry.chemical_element[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural scienceslcsh:QC1-999chemistryNucleosynthesisExcited state0103 physical sciencesNeutronNuclideAtomic physics010306 general physicsNuclear Experimentlcsh:PhysicsPalladiumdescription
The neutron-rich isotopes of palladium have attracted considerable interest in terms of the evolution of the N=82 neutron shell closure and its influence on the r-process nucleosynthesis. In this Letter, we present the first spectroscopic information on the excited states in Pd and Pd studied using the EURICA γ-ray spectrometer, following production via in-flight fission of a high-intensity U beam at the RIBF facility. New isomeric states with half-lives of 144(4) ns and 39(6) μs have been assigned spins and parities of (23/2 ) and (19/2 ) in Pd and Pd, respectively. The observed level properties are compared to a shell-model calculation, suggesting the competition between proton excitations and neutron excitations in the proton-hole and neutron-hole systems in the vicinity of the doubly magic nucleus Sn.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-05-01 |