6533b825fe1ef96bd12830d1
RESEARCH PRODUCT
Identification of excited states in doubly odd63140Eu77by recoil-isomer tagging
Matti LeinoD. M. CullenD J {Dobson}D. T. JossA. KeenanE. S. PaulJanne PakarinenM. A. BentleyJohn DurellPaivi NieminenPasi KuusiniemiS. JuutinenA.-p. LeppänenR. JulinPanu RahkilaS. J. FreemanHeikki KettunenL. K. PattisonP. T. W. ChoyJuha UusitaloD. T. ScholesR. S. ChakrawarthyPaul GreenleesC. ScholeyPeter M. Jonessubject
PhysicsNuclear and High Energy PhysicsRecoilExcited stateHadronNuclear structureGamma rayFermionAtomic physicsNucleonRadioactive decaydescription
The 36Ar + 107Ag fusion-evapn. reaction was used to search for isomeric states in the N = 77 isotope 140Eu near the proton-drip line. The recoiling nuclei were implanted into a Si detector, at the focal plane of a gas-filled separator, where prompt and delayed g-ray transitions were correlated across isomeric states using recoil-isomer tagging. The feeding and decay of a new 299(3) ns isomeric state was established. This measurement represents the first observation of excited high-spin states in 140Eu. The behavior of the new states above the isomer is discussed in terms of theor. calcns. based upon the cranked-shell model and upon the exptl. systematics of other N = 77 isotones. Within this framework, the isomer was interpreted to be built upon a ph11/2 ? nh11/2 two-quasiparticle configuration. [on SciFinder (R)]
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-09-11 | Physical Review C |