6533b7d9fe1ef96bd126d056
RESEARCH PRODUCT
Identification of the Jπ = 1− state in 218Ra populated via α decay of 222Th
E. ParrJ. F. SmithPaul GreenleesM. SmolenPhilippos PapadakisKalle AuranenR. ChapmanD. M. CullenTuomas GrahnL. GrocuttAndrej HerzanR.-d. HerzbergD. HodgeUlrika JakobssonRauno JulinSakari JuutinenJoonas KonkiMatti LeinoC. McpeakeD. MengoniA. K. MistryK. F. MulhollandG. G. O'neillJanne PakarinenJari PartanenPauli PeuraPanu RahkilaPanu RuotsalainenMikael SandzeliusJan SarénM. ScheckCatherine ScholeyJuha SorriSanna StolzeM. J. TaylorJuha Uusitalosubject
radiumNuclear Theoryoctupole correlationsdeformed nucleitoriumexcited statesdescription
The α decay of 222Th populating the low-lying J π = 3− state, and also a proposed 1− state, in 218Ra has been observed. The observations suggest an excitation energy of 853 keV for the 1− state, which is 60 keV above the 3− state. The hindrance factors of these α decays give a possible boundary to the region of ground-state octupole deformation in the light-actinide nuclei. The relative positions of the J π = 1− and 3− states suggest they are produced by an octupole-vibrational mechanism, as opposed to α clustering or rotations of a reflection-asymmetric octupole-deformed shape. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 |