6533b832fe1ef96bd129a119
RESEARCH PRODUCT
Proton Shell Evolution below Sn132 : First Measurement of Low-Lying β -Emitting Isomers in Ag123,125
Shudong ZhangNaoki FukudaZs. PodolyákShunji NishimuraYan-lin YeT. IsobeC. Y. NiuHiroki NishibataXiaocan LiJin WuJin WuZiyang ChenY. JinToshiyuki KuboK. MoschnerD.x. JiangH.k. WangK. YoshinagaChenyuan LiK. Y. ChaeJian-ling LouDa LuoG. BenzoniA. JungclausHirofumi WatanabeAyumi YagiN. KurzHiroshi SuzukiI. KojouharovHiroyoshi SakuraiAtsuko OdaharaG. D. KimYoung-ki KimH. Y. WuYounghun KwonA. Montaner-pizáH. BabaRoman GernhäuserG. J. LaneGiuseppe LorussoGiuseppe LorussoZhengyu XuZhengyu XuToshiyuki SumikamaHiroyuki TakedaC. XuNaohito InabeAnna WendtZs. VajtaH. SchaffnerF. C. L. CrespiGary SimpsonF. G. KondevC. G. WuZ. H. LiF. NaqviD. KamedaP. A. SöderströmP. DoornenbalK. SteigerX. WangZena PatelF. BrowneH. S. JungH. S. JungCenxi YuanMegumi NiikuraJan TaproggeJan TaproggeGuillaume GeyR. OrlandiR. OrlandiC. G. WangHui Huasubject
PhysicsAtomic orbitalIsotope0103 physical sciencesMagnetic monopoleGeneral Physics and AstronomyAtomic physics010306 general physicsSpectroscopy7. Clean energy01 natural sciencesdescription
The β-delayed γ-ray spectroscopy of neutron-rich 123;125Ag isotopes is investigated at the Radioactive Isotope Beam Factory of RIKEN and the long-predicted 1/2¯ β-emitting isomers in 123;125Ag are identified for the first time. With the new experimental results, the systematic trend of energy spacing between the lowest 9/2+ and 1/2¯ levels is extended in Ag isotopes up to N = 78, providing a clear signal for the reduction of the Z = 40 subshell gap in Ag towards N = 82. Shellmodel calculations with the state-of-the-art VMU plus M3Y spin-orbit interaction give a satisfactory description of the low-lying states in 123;125Ag. The tensor force is found to play a crucial role in the evolution of the size of the Z = 40 subshell gap. The observed inversion of the single particle levels around 123Ag can be well interpreted in terms of the monopole shift of the π1g9/2 orbitals mainly caused by the increasing occupation of ʋ1h11/2 orbitals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-05-28 | Physical Review Letters |