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  • Reference Database for Beta-Delayed Neutron Emission Evaluation

    Closed for proposals

    Project Type

    Coordinated Research Project

    Project Code

    F41030

    CRP

    1960

    Approved Date

    12 September 2012

    Status

    Closed

    Start Date

    22 February 2013

    Expected End Date

    21 February 2018

    Completed Date

    12 July 2018

    Description

    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

    Type

    International Review Journal

    Year

    2016

    Description

    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.

    Country/Organization

    Progress in Nuclear Energy

    Type

    International Peer-reviewed journal (ELSEVIER)

    Year

    2016

    Publication URL

    http://www.sciencedirect.com/science/article/pii/S0168900215013169

    Description

    Characterization of a neutron-beta counting system with beta-delayed neutron emitters, by J. Agramunt, J.L. Tain, JM.B. Gomez-Hornillos, et al.

    Country/Organization

    Nuclear Instruments and Methods A

    Type

    International Peer-reviewed web publication

    Year

    2016

    Description

    Delayed neutron emission near the shell-closures, by I.N. Borzov

    Country/Organization

    European Physical Journal Web of Conferences

    Type

    Proc. of the 24th Russian Particle Accelerator Conference, RuPAC 2014

    Year

    2014

    Description

    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.

    Country/Organization

    Russian Federation

    Type

    International Peer-reviewed journal

    Year

    2016

    Publication URL

    https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.117.012501

    Description

    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

    Country/Organization

    Physical Review Letters (APS)

    Type

    INDC(NDS)

    Year

    2015

    Publication URL

    http://www-nds.iaea.org/publications/indc/indc-nds-0689.pdf

    Description

    High Resolution Measurements of Aggregate Delayed Neutron Spectra in Different Time Intervals from Thermal Neutron Induced Fission of 235U, by V. Piksaikin et al.

    Country/Organization

    IAEA

    Type

    International Peer-reviewed journal

    Year

    2015

    Publication URL

    http://www.sciencedirect.com/science/article/pii/S0090375215000356

    Description

    Evaluation of Beta-Delayed Neutron Emission Probabilities and Half-Lives for Z = 2-28, by M. Birch, B. Singh, I. Dillmann, et al.

    Country/Organization

    Nuclear Data Sheets (ELSEVIER)

    Type

    Conference Proceedings (XXII-th International Seminar on Interaction of Neutrons with Nuclei, Dubna, Russia, 24-28 May, 2014)

    Year

    2014

    Description

    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.

    Country/Organization

    Russian Federation

    Type

    International Peer-reviewed journal

    Year

    2016

    Publication URL

    http://journals.aps.org/prc/pdf/10.1103/PhysRevC.93.025805

    Description

    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)

    Country/Organization

    Physical Review C (American Physical Society)

    Type

    International Peer-reviewed journal

    Year

    2014

    Publication URL

    http://www.sciencedirect.com/science/article/pii/S0090375214004608

    Description

    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

    Country/Organization

    Nuclear Data Sheets (ELSEVIER)

    Type

    INDC(NDS)

    Year

    2014

    Publication URL

    http://www-nds.iaea.org/publications/indc/indc-nds-0646.pdf

    Description

    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.

    Country/Organization

    IAEA

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