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RESEARCH PRODUCT

Shell structure beyond the proton drip line studied via proton emission from deformed 141Ho

Mario StoitsovMario StoitsovMario StoitsovCarl J GrossA. PiechaczekSean LiddickSean LiddickD. SimpsonK. P. RykaczewskiC. GoodinJacek DobaczewskiJacek DobaczewskiWitold NazarewiczWitold NazarewiczWitold NazarewiczChang-hong YuK. H. MaierJ. H. HamiltonK. P. RykaczewskiD. SchapiraA. KorgulM. KarnyM. KarnyW. KrolasW. KrolasC. R. BinghamC. R. BinghamN. NikolovMohammed N. TantawyJ. A. WingerAndrás Tibor KruppaK. LiJ. C. BatchelderRobert GrzywaczRobert GrzywaczC. MazzocchiC. MazzocchiE. F. Zganjar

subject

PhysicsNuclear and High Energy PhysicsProtonProton radioactivity; Proton shell structure; Two-body tensor interactionsNuclear TheoryHadronElementary particleExcited stateQuadrupoleProton emissionAtomic physicsNuclear ExperimentNucleonGround state

description

Abstract Fine structure in proton emission from the 7 / 2 − [ 523 ] ground state and from the 1 / 2 + [ 411 ] isomer in deformed nucleus 141Ho was studied by means of fusion-evaporation reactions and digital signal processing. Proton transitions to the first excited 2+ state in 140Dy, with the branching ratio of I p g s ( 2 + ) = 0.9 ± 0.2 % and I p m ( 2 + ) = 1.7 ± 0.5 % , were observed. The data are analyzed within the non-adiabatic weak coupling model assuming a large quadrupole deformation of the daughter nucleus 140Dy as predicted by the self-consistent theory. Implications of this result on coexistence effects around N = 74 are discussed. Significant modifications of the proton shell structure when going from the valley of beta stability to the proton drip line are discussed in terms of self-consistent theory involving the two-body tensor interaction.

yearjournalcountryeditionlanguage
2008-06-01Physics Letters B
10.1016/j.physletb.2008.04.056http://dx.doi.org/10.1016/j.physletb.2008.04.056