High Energy Physics Seminar: Dr. Zachariah Miller, University of Kentucky  Add To Calendar

  • Date(s): Tuesday, 12/2 1:30 PM to Tuesday, 12/2 2:30 PM
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  • Campus Address: 2214 SES (Science and Engineering South)

Title: Neutron-Induced Fission in Uranium Isotopes
Abstract: The fissioning of nuclei has a rich history and many practical applications in energy and weaponry. However, despite being extensively studied since its discovery 1938, we still have many gaps in our knowledge regarding fission. In this talk, I will present new research investigating two unstudied energy regions. First, I will discuss the fission cross-section in 238-Uranium for bombardment with neutrons above 100 MeV. In this measurement, a white neutron beam was incident upon 238U foils. We extract fission yields and normalize our beam flux using np-elastic, which has a well known cross-section. These data are used to fill in the energy region between 100 and 300 MeV, which previously had few measurements. In the second measurement, we investigate the energy dependence of the prompt decay neutrons released upon a 235U fission, focusing on the region under 1 MeV. Due to technical limitations in most detectors, this region is previously unmeasured despite the wide-spread belief that nearly 30% of outgoing fission neutrons are in this energy region. Our new detector design, and some preliminary results for prompt neutron energy, are presented alongside a discussion of the unique features of these detectors.

HEP Dec 2 flyer