Search results for "Neutron-induced fission"

showing 3 items of 3 documents

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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Production of Sn and Sb isotopes in high-energy neutron induced fission of natU

2018

The first systematic measurement of neutron-induced fission yields has been performed at the upgraded IGISOL-4 facility at the University of Jyväskylä, Finland. The fission products from high-energy neutron-induced fission of nat U were stopped in a gas cell filled with helium buffer gas, and were online separated with a dipole magnet. The isobars, with masses in the range A = 128-133 , were transported to a tape-implantation station and identified using γ -spectroscopy. We report here the relative cumulative isotopic yields of tin (Z = 50) and the relative independent isotopic yields of antimony (Z = 51). Isomeric yield ratios were also obtained for five nuclides. The yields of tin show a …

Nuclear reactionPhysicsNuclear and High Energy PhysicsFission products010308 nuclear & particles physicsFissionIsotopes of samariumFission product yield01 natural sciences7. Clean energyFast fissionNuclear physicsSubatomär fysikneutron-induced fission yields0103 physical sciencesIsotopes of tinSubatomic PhysicsNeutronsystematic measurement010306 general physics
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New design and simulation of the ion guide for neutron-induced fission products at the IGISOL facility

2023

Measurements of independent fission yield distributions in neutron-induced fission at high neutron energies are important for our fundamental understanding of the fission process, and are also relevant for reactor physics applications. So far, measurements of independent fission yields in proton-induced fission have been performed at the IGISOL facility at the University of Jyväskylä, using the Penning trap as a high resolving-power mass-filter. In order to also facilitate measurements of neutron-induced fission, a dedicated ion guide and a proton-to-neutron converter was developed. However, the first measurement indicates that fewer fission products than expected reach the Penning trap. To…

Subatomär fysikfissioCOMSOLydinreaktiotionitiimulationSubatomic Physicsion guideneutronitNeutron-induced fissionydinfysiikkaGEANT4electric field
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