0000000000383290

AUTHOR

W. Alt

showing 3 related works from this author

Spatial separation of atomic states in a laser-cooled ion crystal

1998

A laser cooled ion crystal containing several hundred Ca+ ions has been stored in a linear Paul trap. Cooling is provided by a red detund laser at the 4S1/2−4P1/2 resonance transition. A second laser serves for repumping of those ions which decay from the excited 4P1/2 level to the metastable 3D3/2 state. The ions can be additionally excited by a third laser to a long lived metastable 3D5/2 energy level which decouples them from the cooling laser radiation. The light pressure acting upon the laser cooled ions pushes them into the direction of the laser beam. The ions in the metastable 3D5/2 state, however, do not experience any light pressure force and diffuse to the crystal side which poin…

PhysicsResolved sideband coolingPhysics::OpticsLaserAtomic and Molecular Physics and OpticsIonlaw.inventionCrystalPhysics::Plasma PhysicslawLaser coolingExcited statePhysics::Atomic PhysicsIon trapAtomic physicsAtomic vapor laser isotope separationPhysical Review A
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Shifts of the 3D - 4P transitions in different isotopes of positive calcium ions

1997

A sample of stable isotopes containing the masses 40, 42, 43 and 44 was stored under buffer-gas conditions in a Paul ion trap. After population of the metastable 3D levels by spontaneous decay of the laser-excited 4P state we observed laser-induced fluorescence when we scanned a laser across the different 3D - 4P fine-structure lines at 850, 854 and 866 nm. From the Doppler-limited lines of these transitions we deduced the isotope shifts, which are of the order of several GHz due to the large specific mass shift of the metastable 3D levels.

Physicseducation.field_of_studyIsotopeStable isotope ratioPopulationCondensed Matter PhysicsLaserFluorescenceAtomic and Molecular Physics and Opticslaw.inventionIonlawMetastabilityPhysics::Atomic PhysicsIon trapAtomic physicseducationJournal of Physics B: Atomic, Molecular and Optical Physics
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Spatial separation of atomic states in a laser cooled ion crystal

1999

A laser cooled ion crystal containing several hundred Ca+ ions has been stored in a linear Paul trap. Cooling is provided by a red detund laser at the 4S1/2−4P1/2 resonance transition. A second laser serves for repumping of those ions which decay from the excited 4P1/2 level to the metastable 3D3/2 state. The ions can be additionally excited by a third laser to a long lived metastable 3D5/2 energy level which decouples them from the cooling laser radiation. The light pressure acting upon the laser cooled ions pushes them into the direction of the laser beam. The ions in the metastable 3D5/2 state, however, do not experience any light pressure force and diffuse to the crystal side which poin…

ChemistryPhysics::OpticsResonanceLaserlaw.inventionIonCrystalRadiation pressurePhysics::Plasma PhysicslawExcited stateMetastabilityPhysics::Atomic PhysicsIon trapAtomic physicsAIP Conference Proceedings
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