Reference Database for Beta-Delayed Neutron Emission Evaluation
Closed for Proposals
Project Type
Coordinated Research ProjectProject Code
F41030
CRP
1960
Approved Date
12 September 2012Project Status
ClosedStart Date
22 February 2013Expected End Date
21 February 2018Completed Date
12 July 2018Description
The field of beta delayed neutron emission has been of interest since the discovery of nuclear fission. However, the status of compilation of available data is not satisfactory. Applying state-of-the-art experimental techniques, new measurements of beta delayed neutrons have been undertaken at various different laboratories such as GSI (Germany), Triumf (Canada), Riken (Japan) and ORNL (USA). It has been indicated that the IAEA should take a role at the centre of these activities and coordinate the efforts by evaluating, compiling and, eventually, disseminating the results in form of a Reference Database for Beta-delayed Neutron Emission Evaluation. Therefore this CRP is proposed.
Objectives
To enhance Member States’ (MS) knowledge and calculational capabilities in the fields of Nuclear Energy, Safeguards, used fuel and waste management and nuclear sciences by creating a Reference Database for Beta-delayed neutron Emission? that contains both a compilation of existing data and recommended data, which will be made readily available to the user community.
Specific Objectives
Compile the existing Beta-delayed neutron data, in particular half-lives, neutron emission probabilities and neutron spectra for individual precursors
Create a reference database of evaluated data for beta-delayed neutron emission
Define and document the evaluation methodology and the “Standards” for delayed neutron emission in different mass regions,
Produce tools to extrapolate results to unknown nuclei by use of theoretical models or systematic trends
Re-evaluate the beta-delayed neutron reactor constants in suitable group format for energy applications and include in database.
CRP Publications
Physical Review Letters (APS)
International Peer-reviewed journal
2016
First measurement of several beta-delayed neutron emitting isotopes beyond N=126, R. Caballero-Foch, A.Algora,…,I.N. Borzov,…,I. Dillmann, …, T. Marketin,…,J.L. Tain, et al
IAEA
INDC(NDS)
2014
The absolute total delayed neutron yields, rel. abundances and half-lives of delayed neutron groups in 6- and 8-group model from neutron-induced fission of 232Th, 233U, 236U, 239Pu and 241Am in the energy range from 0.35 MeV to 5 MeV, by V. Piksaikin et al.
IAEA
INDC(NDS)
2015
High Resolution Measurements of Aggregate Delayed Neutron Spectra in Different Time Intervals from Thermal Neutron Induced Fission of 235U, by V. Piksaikin et al.
Russian Federation
Conference Proceedings (XXII-th International Seminar on Interaction of Neutrons with Nuclei, Dubna, Russia, 24-28 May, 2014)
2014
The total number of delayed neutrons and average half-life of their precursors in the neutron induced fission of 235U, 238U, 239Pu (Summation method), by K. Mitrofanov, V. Piksaikin, et al.
Progress in Nuclear Energy
International Review Journal
2016
Relative abundances of delayed neutrons and half-lives of their precursors in the interaction of 238U with relativistic protons, by A.S. Egorov, V.M. Piksaikin, et al.
Nuclear Data Sheets (ELSEVIER)
International Peer-reviewed journal
2015
Evaluation of Beta-Delayed Neutron Emission Probabilities and Half-Lives for Z = 2-28, by M. Birch, B. Singh, I. Dillmann, et al.
Nuclear Instruments and Methods A
International Peer-reviewed journal (ELSEVIER)
2016
Characterization of a neutron-beta counting system with beta-delayed neutron emitters, by J. Agramunt, J.L. Tain, JM.B. Gomez-Hornillos, et al.
Nuclear Data Sheets (ELSEVIER)
International Peer-reviewed journal
2014
First Compilation and Evaluation of Beta-Delayed Neutron Emission Probabilities and Associated Half-Lives for A = 72 Nuclei, by M. Birch, B. Singh, D. Abriola et al
Physical Review C (American Physical Society)
International Peer-reviewed journal
2016
Large-scale evaluation of ?-decay rates of r-process nuclei with the inclusion of first-forbidden transitions, by T. Marketin et al (including Supplement with tables)
European Physical Journal Web of Conferences
International Peer-reviewed web publication
2016
Delayed neutron emission near the shell-closures, by I.N. Borzov
Russian Federation
Proc. of the 24th Russian Particle Accelerator Conference, RuPAC 2014
2014
Experimental study of the time dependence of the activity of delayed neutrons in the fission of 235U by neutrons from the reaction 7LI(p, n) on the electrostatic accelerator EG-1, by K. Mitrofanov, V. Piksaikin, et al.