6533b7dbfe1ef96bd12715d2
RESEARCH PRODUCT
The identification of autoionizing states of atomic chromium for the resonance ionization laser ion source of the ISOLDE radioactive ion beam facility
K. ChrysalidisK. ChrysalidisD. V. FedorovSebastian RotheP. L. MolkanovB. A. MarshC. SeiffertRalf Erik RosselRalf Erik RosselRalf Erik RosselV. N. FedosseevT. Day GoodacreT. Day Goodacresubject
Ion beamChemistry010401 analytical chemistryResonanceMass spectrometryphysics.atom-ph01 natural sciencesIon sourceAtomic and Molecular Physics and Optics0104 chemical sciencesAtmospheric-pressure laser ionizationAnalytical ChemistryIon beam depositionIonization0103 physical sciencesPhysics::Atomic and Molecular ClustersPhysics::Accelerator PhysicsNuclear Physics - ExperimentPhysics::Atomic PhysicsAtomic physics010306 general physicsInstrumentationElectron ionizationSpectroscopydescription
Abstract This paper presents the results of an investigation into autoionizing states of atomic chromium, in the service of the resonance ionization laser ion source (RILIS): the principal ion source of the ISOLDE radioactive ion beam facility based at CERN. The multi-step resonance photo-ionization process enables element selective ionization which, in combination with mass separation, allows isotope specific selectivity in the production of radioactive ion beams at ISOLDE. The element selective nature of the process requires a multi-step “ionization scheme” to be developed for each element. Using the method of in-source resonance ionization spectroscopy, an optimal three-step, three-resonance photo-ionization scheme originating from the 3d 5 ( 6 S)4s a 7 S 3 atomic ground state has been developed for chromium. The scheme uses an ionizing transition to one of the 15 newly observed autoionizing states reported here. Details of the spectroscopic studies are described and the new ionization scheme is summarized.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-03-01 | Spectrochimica Acta Part B: Atomic Spectroscopy |