6533b821fe1ef96bd127c0dc

RESEARCH PRODUCT

New nuclides: Neptunium-243 and neptunium-244

H. TetzlaffH. GäggelerK. J. MoodyM. BrüggerM. SchädelJ. V. KratzGünter HerrmannGunnar SkarnemarkW. BrüchleJ. RogowskiB. HaefnerK. SümmererNorbert TrautmannM. SkålbergMalcolm M. FowlerN. KaffrellJ. Alstad

subject

Nuclear and High Energy PhysicsMaterials sciencechemistryIsotopeNeptuniumRadiochemistryNuclear fusionchemistry.chemical_elementNuclideAtomic physicsGround state

description

We have observedγ-rays following the β−-decay of243Np and244Np after chemical isolation of neptunium isotopes from the products of the reaction of 835 MeV136Xe with244Pu. The ground-state of 1.85-min243Np hasJ=5/2. The decay of 2.29-min244Np (probableJπ=7−) populates high-spin members of the ground state rotational band in244Pu.

https://doi.org/10.1007/bf01289627