INTERNATIONAL NETWORK OF NUCLEAR STRUCTURE AND DECAY DATA EVALUATORS (NSDD)
Scientific Secretary: Paraskevi Demetriou
What is the NSDD network? Find out here.
Joint IAEA-ICTP Workshop on Nuclear Structure and Decay Data: Experiment, Theory and Evaluation
The next IAEA-ICTP Workshop will be held from 15 to 26 October 2018, at the ICTP, Miramare, Trieste. More information will be posted as it becomes available.
22nd Technical Meeting of the NSDD network
The 22nd Technical Meeting of the NSDD network was held from 22 to 26 May 2017, at Lawrence Berkeley National Laboratory, California. Information about the meeting and access to presentations is available here. The summary report of the meeting is published in INDC(NDS)-0733.
Evaluation of Nuclear Moments
A Consultant's Meeting was held at the IAEA, from 27 to 30 March 2017, to address the need for providing recommended nuclear magnetic dipole moments (DM), in addition to updating the evaluation of electric quadrupole moments (QM) performed by P. Pyykkö (Mol. Phys. 106 (2008) 1965) and N. Stone (INDC(NDS)-0650).
Meeting participants discussed the necessary corrections required for DMs to consider effects of diamagnetism, hyperfine anomaly, model assumptions for short-lived states, as well as advances in electric field gradient calculations for the QMs. They agreed to contribute to the production of a table of evaluated nuclear moments that would be made available in a published volume and incorporated in the online Nuclear Moments database.
Joint ICTP-IAEA Workshop on Nuclear Structure and Decay Data: Experiment, Theory and Evaluation, 22 August - 2 September 2016, Trieste
Workshop Directors: P. Dimitriou (IAEA), E. McCutchan (BNL), and M. Thoennessen (MSU)
The aim of this workshop is to introduce both young and established nuclear scientists to the evaluation of nuclear structure and decay data, by providing them with basic training in the evaluation methodologies, procedures and formats that are involved in the assembly and maintenance of the Evaluated Nuclear Structure Data File (ENSDF).
This workshop belongs to a series of well-defined ICTP workshops that have been crucial for attracting young nuclear scientists to nuclear structure and decay data evaluation and for providing them with the basic tools to pursue this activity.
The main topics of the workshop include:
- modern nuclear experimental techniques & facilities;
- modern nuclear structure models;
- nuclear structure and decay data: compilations and evaluations;
- evaluation methodologies for nuclear structure and decay data;
- analysis and utility codes;
- ENSDF editors and Web tools;
- databases and online retrieval software.
- H. Sakurai (RIKEN)
- P. Van Isacker (GANIL)
- P. Regan (Surrey)
- B. Singh (McMaster)
- F. Kondev (ANL)
- T. Kibedi (ANU)
- J. Tuli (BNL)
- S. Basunia (LBL)
- M. Verpelli (IAEA)
- V. Zerkin (IAEA)
More details about the workshop, including the scientific program and lecture notes, can be found at the ICTP activity (SMR2859) web site. The workshop practical exercises included both the compilation of 25 XUNDL data sets and the evaluation of mass chain A=217.
The workshop poster can be downloaded here.
The Nuclear Data Section has began a Data Development Project to address all the problems that are encountered in the utilization of the existing ENSDF codes in view of the overall need to re-structure and/or re-write them using modern programming tools. The kick-off Technical Meeting was held at IAEA headquarters in Vienna, from 10 to 13 June 2014. The output of this meeting was a priority list of codes that need to be improved and a list of assignments/tasks to be delivered within a given period. A summary report of the meeting is available INDC(NDS)-0665. Presentations given at the meeting are available here.
A follow-up meeting to monitor progress and revise the assignments as deemed necessary was held from 5 to 8 October 2015, at the IAEA, in Vienna. The summary report of the meeting is available INDC(NDS)-0696. The presentations given at this meeting can be found here.
A dedicated web page on the IAEA ENSDF Codes development project is available at this link.
The database comprises data found in print compilations (INDC(NDS)-0650, INDC(NDS)-0658), peer-reviewed journals and conference proceedings. The user can click on a built-in periodic table to choose an element and then the isotope of interest. Alternatively, the user can type in the atomic (Z) or mass (A) number in input form. The data are displayed in a concise tabulated form. Bibliographical information has been linked to the sources, i.e. NSR key numbers are linked to the NSR database, and in addition, Digital Object identifiers (DOI) have been added to all the publications featuring one. Further developments will include enhancement of retrieval capabilities and plotting tools.
The database can also be accessed from the "Quick links" (left column), the "Structure & Decay" tab, and the Livechart - tab "Nuclear Moments", all available on the IAEA Nuclear Data Services web site.
The workshop took place from 27 to 29 April 2015 at the IAEA Headquarters in Vienna. Active NSDD evaluators met to
- discuss frequently encountered problems in their evaluation work,
- be informed on evaluation policies and their implementation,
- be updated about analysis codes,
- refresh their evaluation skills.
The workshop coordinators, Filip Kondev (ANL/USA) and Elizabeth McCutchan (BNL/USA), put together a scientific programme that covered a number of issues of importance to ENSDF evaluations, including policies, procedures, formats, and codes, with special advise from Murray Martin (ORNL/USA). The 'lectures' were based on a combination of presentations and round-table discussions evolving around specific examples and highlighting 'best practices'.
During the workshop, participants also had the opportunity to discuss topics of their preference stemming from their own evaluation work. Several 30-minute long sessions were devoted to discussing participant's topics on Wednesday, 29th April.
Nuclear Moments Tables
The updated table of Magnetic Dipole and Electric Quadrupole Moments, prepared by N.J. Stone to replace the previous one (INDC(NDS)-0594), has been published in INDC(NDS)-0658. It covers the literature up to February 2014.
A table of static electric quadrupole moments including recommended values, also prepared by N.J. Stone, is available in INDC(NDS)-0650.
An ENSDF Retrieval Program
Matthias Nagl and his group,at Physikalisches Institut, Georg-August-Universität Göttingen, Germany, has created a retrieval program for ENSDF. The program is a stand-alone retrieval and has very useful options including a decay scheme and its spectral representation. The software is open source and the authors encourage users to freely download and use it. It is available for download here. The related paper is available here.
Meeting on XUNDL 2013
A 1.5 day working group meeting was held on 16-17 May 2013 at the Triangle Universities Nuclear Laboratory to discuss activities connected with XUNDL.