2021 Updates

Fission Yields

Cumulative and Independent Fission Yields.
Source:
The JEFF-3.1/-3.1.1 radioactive decay data and fission yields sub-libraries, ISBN 978-64-99087-6 M. Kellett, O. Bersillon, R. Mills. (JEFF Report 20, NEA No. 6287)
Long-lived radionuclides with half-lives greater than 10³ yr have not been considered in the determination of the cumulative and chain fission yields.

The links below provide the data in HTML tables and CSV files. This zip file contains all the CSVs

Independent CSV File	Cumulative CSV File	Chain CSV File	Independent HTML File	Cumulative HTML File	Chain HTML File

Interactive plots
Generated with Jupyter lab

Mouse over to see info about the points
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Chain Fission Yields: Major Actinides for a given energy
Chain Fission Yields: energies for a given Major Actinide
Cumulative Fission Yields: Major Actinides and energies
Independent Fission Yields: Major Actinides and energies

Delayed Neutrons Group Parameters

Data for 6- and 8- Group Parameters for Major Actinides: HTML file and Excel file
For both Major and Minor Actinides, see the Reference Database for Beta-Delayed Neutron Emission

Source
Nucl. Data Sheets 173 (2021) 144 (recommended data),
INDC(NDS)-0784 (reference DN data),
Piksaikin et al., EPJ Nuclear Sci. Technol. 6, 54 (2020) (methodology)