0000000000335940

AUTHOR

T. Reisinger

showing 2 related works from this author

Influence of chain length on the molecular dynamics of an aliphatic ionene

1998

An aliphatic random copolymer ionene (a cationic polyelectrolyte with N + in the repeat unit), was fractionated with the continuous polymer fractionation and investigated for its molecular weight dependent properties. The fractions were analyzed with GPC and capillary viscometry for their molecular weight. Glass transition temperatures were determined with DSC and a strong molecular weight dependence was observed, but no influence in the ionic conductivity was observed. The temperature dependency of ionic conductivity in ionenes is described.

Molecular dynamicsPolymers and PlasticsChemistryGeneral Chemical EngineeringPolymer chemistryCationic polymerizationCopolymerPhysical chemistryViscometerIonic conductivityPolymer fractionationGlass transitionPolyelectrolyteActa Polymerica
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Doppler free ?dark resonances? for hyperfine measurements and isotope shifts in Ca+ isotopes in a Paul trap

1995

We have observed “dark resonances” in theA-type level structure, formed by the 4S1/2 ground state, the 4P1/2 excited state and the low lying metastable 3D3/2 state in the Calcium ion, confined in a Paul radio-frequency trap. These Doppler-free and potentially very narrow resonances were used to determine the magnetic dipole hyperfine interaction constant A for the 4P1/2 and 3D3/2 state of43Ca+, giving −142(8) MHz and −48.3(1.6) MHz, respectively. From measurements of the P-D (E1) and S-D (E2) transition wavelength in a mixture of43Ca+ and40Ca+ we determined the isotope shifts of these lines.

PhysicsWavelengthIsotopeMetastabilityExcited statePhysics::Atomic PhysicsIon trapAtomic physicsGround stateHyperfine structureMagnetic dipoleAtomic and Molecular Physics and OpticsZeitschrift f�r Physik D Atoms, Molecules and Clusters
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