Search results for "isotope production"

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Developments for neutron-induced fission at IGISOL-4

2016

At the IGISOL-4 facility, neutron-rich, medium mass nuclei have usually been produced via charged particle-induced fission of natural uranium and thorium. Neutron-induced fission is expected to have a higher production cross section of the most neutron-rich species. Development of a neutron source along with a new ion guide continues to be one of the major goals since the commissioning of IGISOL-4. Neutron intensities at di↵erent angles from a beryllium neutron source have been measured in an on-line experiment with a 30 MeV proton beam. Recently, the new ion guide coupled to the neutron source has been tested as well. Details of the neutron source and ion guide design together with prelimi…

Nuclear and High Energy Physicsta114010308 nuclear & particles physicsNeutron emissionChemistryXenon-135Astrophysics::High Energy Astrophysical Phenomenatarget and ion source techniquesNuclear Theoryion guideFission product yield01 natural sciencesFast fissionNuclear physicslow-energy separators0103 physical sciencesneutron-induced fissionNeutron cross sectionNeutron sourceNeutron010306 general physicsLong-lived fission productNuclear Experimentisotope productionInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Detection of the Lowest-Lying Odd-Parity Atomic Levels in Actinium

2020

Two lowest-energy odd-parity atomic levels of actinium, 7s27pP21/2o, 7s27pP23/2o, were observed via two-step resonant laser-ionization spectroscopy and their respective energies were measured to be 7477.36(4) and 12 276.59(2) cm-1. The lifetimes of these states were determined as 668(11) and 255(7) ns, respectively. In addition, we observed the effect of the hyperfine structure on the line for the transition to P23/2o. These properties were calculated using a hybrid approach that combines configuration interaction and coupled-cluster methods, in good agreement with the experiment. The data are of relevance for understanding the complex atomic spectra of actinides and for developing efficien…

FUNDAMENTAL PHYSICSGeneral Physics and Astronomychemistry.chemical_elementHYPERFINE STRUCTURE01 natural sciences7. Clean energyATOMIC SPECTROSCOPYLASER IONIZATION SPECTROSCOPYATOMSCOMPLEX ATOMIC SPECTRALaser coolingIonization0103 physical sciences010306 general physicsSpectroscopyNUMERICAL METHODSHyperfine structurePhysicsHYBRID APPROACHATOM LASERSActinideConfiguration interactionCOUPLED-CLUSTER METHODSACTINIUMMEDICAL ISOTOPE PRODUCTIONActiniumchemistryLASER COOLINGIONIZATIONProduction (computer science)Atomic physicsCONFIGURATION INTERACTIONS
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