6533b7d4fe1ef96bd1262b8b
RESEARCH PRODUCT
Prompt and delayed spectroscopy of 203At : Observation of a shears band and a 29/2+ isomeric state
Kalle AuranenJuha UusitaloSakari JuutinenHussam BadranF. Defranchi BissoDaniel CoxTuomas GrahnPaul GreenleesAndrej HerzanU. JakobssonRauno JulinJoonas KonkiMatti LeinoA. LightfootM. J. MallaburnO. NeuvonenJanne PakarinenPhilippos PapadakisJari PartanenPanu RahkilaMikael SandzeliusJan SarénCatherine ScholeyJuha SorriSanna StolzeY. K. Wangsubject
level densitiesnuclear spinelectromagnetic transitionsnuclear density functional theorytiheysfunktionaaliteoriaspektroskopialifetimeswidthsenergy levelsNuclear Experimentisomer decaysydinfysiikkanuclear paritydescription
Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of 203 At ( N = 118 ) significantly. We have observed an isomeric [ τ = 14.1 ( 3 ) μ s ] state with a spin and parity of 29 / 2 + . The isomeric state is suggested to originate from the π ( h 9 / 2 ) ⊗ ∣ ∣ 202 Po ; 11 − ⟩ coupling, and it is depopulated through 286 keV E 2 and 366 keV E 3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 |