Search results for "Berkelium"

showing 2 items of 2 documents

First Experimental Determination of the Ionization Potentials of Berkelium and Californium

1996

BerkeliumChemistryIonizationRadiochemistrychemistry.chemical_elementCaliforniumGeneral MedicineGeneral ChemistryActinideSpectroscopyCatalysisAngewandte Chemie International Edition in English
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Determination of the first ionization potential of actinide elements by resonance ionization mass spectroscopy

1997

Abstract Resonance ionization mass spectroscopy (RIMS) in the presence of an external static electric field has been used for the determination of photoionization thresholds. Extrapolation of the thresholds obtained with different electric field strengths to zero field strength directly leads to the first ionization potential (IP). The ionization potentials of the transplutonium elements americium, curium, berkelium and californium could be measured for the first time. Due to the high sensitivity of RIMS, samples of only 1012 atoms have been used. The results are: IPAm = 5.9738(2)eV, IPCm = 5.9915(2)eV, IPBk = 6.1979(2)eV and IPCf = 6.2817(2)eV. The same technique was applied to thorium, ne…

Chemical ionizationChemistrychemistry.chemical_elementThermal ionizationPhotoionizationMolar ionization energies of the elementsMass spectrometryAtomic and Molecular Physics and OpticsAnalytical ChemistryBerkeliumIonizationIonization energyAtomic physicsInstrumentationSpectroscopySpectrochimica Acta Part B: Atomic Spectroscopy
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