6533b839fe1ef96bd12a6d8e

RESEARCH PRODUCT

Beta decay of neutron-rich Co: Probing single-particle states at and above the N=40 subshell closure

Ulli KösterP. Van DuppenR. RaabeYuri KudryavtsevJ. Van RoosbroeckB. BruyneelS. FranchooL. WeissmanW. F. MuellerI. ReusenMarc HuyseB. PfeifferL. VermeerenP. G. ThirolfA. WöhrK. KruglovW. B. WaltersK. L. Kratz

subject

PhysicsDecay schemeIsotopeNuclear TheoryNuclear structureHalf-lifeNeutronAtomic physicsNuclear ExperimentIsotopes of cobaltBeta decayRadioactive decay

description

Neutron-rich Co nuclei with A=66–70 were produced by the laser-ionization isotope-separation on-line method. The β decay from these nuclei has been studied. A case example is given by reporting on the observed decay scheme of 68Co. The half life of the ground-state decay of this nucleus was measured to be 0.21(3) seconds. In addition, a new β decaying isomer half life of 1.16(25) seconds was discovered. The level scheme of 68Ni has been significantly extended, and an interpretation of the observed levels is made by assuming that the N=40 gap has the characteristics of a shell closure.

https://doi.org/10.1063/1.59515