A1 Journal article (refereed)
Determination of β-decay ground state feeding of nuclei of importance for reactor applications (2020)

Guadilla, V., Tain, J. L., Algora, A., Agramunt, J., Jordan, D., Monserrate, M., Montaner-Pizá, A., Orrigo, S. E. A., Rubio, B., Valencia, E., Briz, J. A., Cucoanes, A., Estienne, M., Fallot, M., Le Meur, L., Porta, A., Shiba, T., Zakari-Issoufou, A.-A., Äystö, J., . . . Sonzogni, A.A. (2020). Determination of β-decay ground state feeding of nuclei of importance for reactor applications. Physical Review C, 102(6), Article 064304. https://doi.org/10.1103/physrevc.102.064304

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Publication details

All authors or editorsGuadilla, V.; Tain, J. L.; Algora, A.; Agramunt, J.; Jordan, D.; Monserrate, M.; Montaner-Pizá, A.; Orrigo, S. E. A.; Rubio, B.; Valencia, E.; et al.

Journal or seriesPhysical Review C



Publication year2020

Publication date02/12/2020


Issue number6

Article number064304

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish


Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/73020


In β-decay studies the determination of the decay probability to the ground state (g.s.) of the daughter nucleus often suffers from large systematic errors. The difficulty of the measurement is related to the absence of associated delayed γ-ray emission. In this work we revisit the 4πγ−β method proposed by Greenwood and collaborators in the 1990s, which has the potential to overcome some of the experimental difficulties. Our interest is driven by the need to determine accurately the β-intensity distributions of fission products that contribute significantly to the reactor decay heat and to the antineutrinos emitted by reactors. A number of such decays have large g.s. branches. The method is relevant for nuclear structure studies as well. Pertinent formulas are revised and extended to the special case of β-delayed neutron emitters, and the robustness of the method is demonstrated with synthetic data. We apply it to a number of measured decays that serve as test cases and discuss the features of the method. Finally, we obtain g.s. feeding intensities with reduced uncertainty for four relevant decays that will allow future improvements in antineutrino spectrum and decay heat calculations using the summation method.

Keywordsnuclear physics

Free keywordsbeta decay; nuclear reactors; nuclear structure and decays; spectrometers and spectroscopic techniques

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Ministry reportingYes

Reporting Year2020

JUFO rating2

Last updated on 2024-22-04 at 14:05