6533b854fe1ef96bd12ae856

RESEARCH PRODUCT

Nuclear Spins of the IsomersHg191m−185mDetermined by On-Line Quantum-Beat Spectroscopy

H.-j. KlugeH. FischerT. KuhlH. KremmlingP. DabkiewiczHans A. Schuessler

subject

Coupling constantPhysicsAngular momentumQuantum beatsIsotopeSpinsPhysics::Atomic and Molecular ClustersGeneral Physics and AstronomyPhysics::Chemical PhysicsAtomic physicsSpectroscopyHyperfine structureExcitation

description

The nuclear spins of the very neutron-deficient $^{191m\ensuremath{-}185m}\mathrm{Hg}$ isomers were measured on line at the mass separator ISO LIDE at CERN using pulsed-laser excitation and observation of the time-resolved quantum beats from selected hyperfine-structure states. The spins of these isomers are with $I=\frac{13}{2}$ equal to those of the long-lived isomers $^{199m\ensuremath{-}193m}\mathrm{Hg}$ already known. The persistence of this spin value for eight isomers is explained by the model of rotation-aligned coupling.

https://doi.org/10.1103/physrevlett.43.1376