The 238U (n, alfa) 235th reaction with thermal neutrons

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  • UGent - Universiteit Gent

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The thermal neutron induced (n, α) reaction cross section of 238U was measured using the highly pure thermal neutron beam from the 87 m curved neutron guide at the High Flux Reactor of the ILL (Grenoble). The energy spectrum showed an α-particle line with Eα = 9.05±0.06 MeV and σ(n, α) = 1.3±0.6 μb. The α-particle energy was used to calculate the 235Th mass of 235.04700±0.00008 amu, the Qα value of 9.20±0.06 MeV for the reaction and the Qβ value of 1.44±0.08 MeV for the β-decay of 235Th. The cross-section data are compared with the results obtained with the statistical model calculation.


Original languageEnglish
Pages (from-to)429-434
Number of pages6
JournalNuclear Physics A
Issue number3
Publication statusPublished - 1976


  • Nuclear reactions

ID: 6867190