Systematic calculations of β-delayed fission probabilities using a microscopic framework
Abstract
The process of β-delayed fission (βDF) consists of a mother nucleus β-decaying to different states of a daughter isotope, followed by fission of the latter with a probability that strongly depends on the energy of the states populated in the β decay. Studying this process experimentally can be challenging due to the typically small βDF probabilities. The theoretical framework presented in this work was developed to globally characterise βDF probabilities. This approach uses energy density functional based models to obtain the necessary inputs for the final probabilities, which are obtained through the nuclear reaction code TALYS. Calculations were performed for all isotopes with an experimentally measured value of βDF probabilities. Following the optimisation of the theoretical framework to better reproduce known data, a global RMS deviation of about two orders of magnitude was achieved, an accuracy that can be used to identify promising cases for future experimental βDF studies.
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BibTeX
@misc{bara2026systematic,
title = {{Systematic calculations of β-delayed fission probabilities using a microscopic framework}},
author = {S. Bara and T. E. Cocolios and S. Goriely and W. Ryssens and A. Sánchez-Fernández and P. Van Duppen},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.37088},
eprint = {2610.37088},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.37088},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Systematic calculations of β-delayed fission probabilities using a microscopic framework
AU - S. Bara
AU - T. E. Cocolios
AU - S. Goriely
AU - W. Ryssens
AU - A. Sánchez-Fernández
AU - P. Van Duppen
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2610.37088
UR - https://arxiv.org/abs/2610.37088
AB - The process of β-delayed fission (βDF) consists of a mother nucleus β-decaying to different states of a daughter isotope, followed by fission of the latter with a probability that strongly depends on the energy of the states populated in the β decay. Studying this process experimentally can be challenging due to the typically small βDF probabilities. The theoretical framework presented in this work was developed to globally characterise βDF probabilities. This approach uses energy density functional based models to obtain the necessary inputs for the final probabilities, which are obtained through the nuclear reaction code TALYS. Calculations were performed for all isotopes with an experimentally measured value of βDF probabilities. Following the optimisation of the theoretical framework to better reproduce known data, a global RMS deviation of about two orders of magnitude was achieved, an accuracy that can be used to identify promising cases for future experimental βDF studies.
ER -