Cumulative fission yields of short-lived fission products from 235U and 239Pu measured by HPGe gamma-ray spectroscopy

Samuel Kim; C. J. Martoff; Michael Dion; David Glasgow

doi:10.1016/j.nima.2023.169001

Cumulative fission yields of short-lived fission products from ²³⁵U and ²³⁹Pu measured by HPGe gamma-ray spectroscopy

Samuel Kim, C. J. Martoff, Michael Dion, David Glasgow

Chemical & Isotopic Mass Spectrometry

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

In this study, we present a preliminary investigation focused on determining cumulative fission yields for short-lived fission products. Our analysis involves examining gamma spectra from the irradiated samples of ²³⁵U and ²³⁹Pu using the High Flux Isotope Reactor. The motivation stems from the observed discrepancy in the antineutrino energy spectrum within the range of 5 to 7 MeV. While several hypotheses have been proposed, a thorough analysis of fission yields provides an additional way of gaining insight into this unexplained phenomenon. Our study suggests that the measured gamma rays from ¹⁰⁰Nb, ¹⁴⁰Cs and ⁹⁵Sr are consistent with the expected values. However, ⁹³Rb, ⁹⁶Y, ⁹⁷Y and ¹⁴²Cs cannot be quantified due to insufficient statistics, interference from other gamma rays and the Compton scattering background. Additionally, the calculated cumulative fission yields based on the measured ¹⁴⁰Cs and ⁹⁵Sr are found to be consistent with the JEFF3.3 fission yield library. The present work shows that the potential of improving gamma-ray spectroscopy in the fission yields as a means to improve our understanding of the antineutrino spectrum.

Original language	English
Article number	169001
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1059
DOIs	https://doi.org/10.1016/j.nima.2023.169001
State	Published - Feb 2024

Funding

Authors would like to thank A. Sonzongni and E. McCutchan for valuable comments. This work was funded by the U.S. National Science Foundation under grant NSF-PHY1242611 , NSF-1812504 , 1747523 , and 1314483 . The work at Brookhaven National Laboratory was sponsored by the Office of Nuclear Physics, Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-98CH10886 with Brookhaven Science Associates, LLC.

Funders	Funder number
National Science Foundation	NSF-1812504, 1314483, NSF-PHY1242611, 1747523
U.S. Department of Energy	DE-AC02-98CH10886
Office of Science
Nuclear Physics

Keywords

Cumulative fission yield
Gamma-ray spectroscopy
Nuclear data library

Access to Document

10.1016/j.nima.2023.169001

Cite this

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title = "Cumulative fission yields of short-lived fission products from 235U and 239Pu measured by HPGe gamma-ray spectroscopy",

abstract = "In this study, we present a preliminary investigation focused on determining cumulative fission yields for short-lived fission products. Our analysis involves examining gamma spectra from the irradiated samples of 235U and 239Pu using the High Flux Isotope Reactor. The motivation stems from the observed discrepancy in the antineutrino energy spectrum within the range of 5 to 7 MeV. While several hypotheses have been proposed, a thorough analysis of fission yields provides an additional way of gaining insight into this unexplained phenomenon. Our study suggests that the measured gamma rays from 100Nb, 140Cs and 95Sr are consistent with the expected values. However, 93Rb, 96Y, 97Y and 142Cs cannot be quantified due to insufficient statistics, interference from other gamma rays and the Compton scattering background. Additionally, the calculated cumulative fission yields based on the measured 140Cs and 95Sr are found to be consistent with the JEFF3.3 fission yield library. The present work shows that the potential of improving gamma-ray spectroscopy in the fission yields as a means to improve our understanding of the antineutrino spectrum.",

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Cumulative fission yields of short-lived fission products from ²³⁵U and ²³⁹Pu measured by HPGe gamma-ray spectroscopy. / Kim, Samuel; Martoff, C. J.; Dion, Michael et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1059, 169001, 02.2024.

Research output: Contribution to journal › Article › peer-review

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