Determination of short-lived fission product yields with gamma spectrometry

The majority of fission yield measurements to date have examined cumulative yields of long-lived nuclides. We present a method for determining independent as well as cumulative fission yields using gamma spectrometry and a Bayesian inverse analysis. This paper outlines the impetus for new fission product yield measurements, the methodology developed to measure these and other nuclear parameters, and initial experimental results for long-lived nuclides and sensitivity analyses. In initial scoping measurements, the cumulative yield of $$^{140}$$¹⁴⁰Ba was estimated as $$4.9966\pm 0.3309$$4.9966±0.3309 %, and the independent yield of $$^{140}$$¹⁴⁰La was estimated to be $$0.0045\pm 0.0022$$0.0045±0.0022 %. These estimated values are commensurate with existing literature values.