Presentation on theme: "Compilation of current Experimental Nuclear Structure and Decay papers: XUNDL database Balraj Singh Department of Physics and Astronomy McMaster University,"— Presentation transcript:
Compilation of current Experimental Nuclear Structure and Decay papers: XUNDL database Balraj Singh Department of Physics and Astronomy McMaster University, Hamilton, Ontario, Canada Decay Data Evaluation Project (DDEP) Workshop LNHB/CEA Saclay, France. October 8-10, 2012
XUNDL: What? When and why? Who? eXperimental Unevaluated Nuclear Data List Compiled (in ENSDF format) Nuclear Structure data from reactions and radioactive decays from current papers in PR-C, PRL, NP-A, EPJ-A, PL-B, JP-G, and several others including some arXiv preprints. In general, information is provided from a single journal article, or from a set of follow- up articles by the same experimental group. Topics: level schemes from reactions and decays, isotopic (ground states and long-lived isomers) half-lives, level lifetimes, spins, rotational and quasi-rotational bands, B(E2), nuclear (static) moments, nuclear radii, etc. Started in December 1998 at McMaster University. Until 2004, only for high-spin papers only. Since then all experimental structure papers are compiled, including those on Radioactive decays..
XUNDL: What? When and why? Where? Bulk (~80%) of the compilations are done at McMaster; compilations received from other centers are reviewed (and edited if necessary) at McMaster. Since April 2008, Dr. Filip Kondev at ANL: NP-A, PL-B, JP-G articles Since April 2009, Dr. John Kelley at TUNL: A=2-20 Some other evaluators have also contributed also in last 2-3 years. Database management: Dr. Jagdish Tuli at NNDC, BNL Most papers compiled within a month or earlier of their appearance in journal web pages. Example: several Sept and Oct 12 papers in PRC, PRL and EPJ-A are already in the database.
XUNDL: Purpose and Scope Provides prompt internet access to nuclear structure and decay data in current publications through on-line retrieval system at NNDC, BNL; and through RADWARE level-scheme database at ORNL. Complements ENSDF database, where data for some of the nuclides may be several years old and outdated. Corrections to current data in ENSDF while going through the compilation of new papers and checking consistency with ENSDF Serves as a repository of relevant data details which for one reason or another, researchers/reviewers do not want to include in publications. It is especially the case for high-spin papers where data details are often not provided in publications. Example: e-mail of July 25, 2012 from Jeffry Thomas in Manchester, UK
XUNDL: Researchers’ unsolicited response From: Jeffry Thomas Subject: XUNDL data Date: Wed, 25 Jul 2012 14:12:12 +0100 To: email@example.com Dear Dr Singh, We have submitted a paper to Physical Review C as a Brief Report entitled, "Neutron pair correlations in A=100 nuclei involved in neutrinoless double beta decay." The paper is awaiting review. I've attached a summary of the data from that paper, and ask that it be included in the XUNDL database after publication. If more is needed for inclusion, please don't hesitate to ask. Kindly, Jeff Thomas Attachement file: pt_xundl.pdf
XUNDL: Researchers’ submitted paper to XUNDL Submission to XUNDL : data from the 102,100Ru(p, t)100,98Ru and 100,98Mo(p, t)98,96Mo reactions J. S. Thomas,1 S. J. Freeman,1 C. M. Deibel,2, 3, ∗ T. Faestermann,4, 5 R. Hertenberger,5, 6 B. P. Kay,7 S. A. McAllister,1 A. J. Mitchell,1 J. P. Schiffer,2 D. K. Sharp,1 and H.-F. Wirth5, 6 1 School of Physics and Astronomy, University of Manchester M13 9PL, United Kingdom 2 Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA 3 Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA 4 Physik Department E12, Technische Universit¨at M¨unchen, D-85748 Garching, Germany 5 Maier-Leibnitz-Laboratorium der M¨unchner Universit¨aten (MLL), D-85748 Garching, Germany 6 Fakult¨at f¨ur Physik, Ludwig-Maximilians-Universit¨at M¨unchen, D-85748 Garching, Germany 7 Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom (Dated: July 25, 2012) This submission has 5 pages of text and tables. Paper accepted in PRC: Sept 24. On request pre-pub copy obtained from authors: Sept 25. “A summary of all cross-section data is available online in the Experimental Unevaluated Nuclear Data List (XUNDL) database .  http://www.nndc.bnl.gov/xundl.” Four datasets prepared and made available in XUNDL database Oct 4 Paper appeared in PRC Oct 5. NSR key# assigned to XUNDL submission. Keyword file for PRC paper sent to NNDC Oct 5.
XUNDL: Purpose and Scope Not limited to regular journal publications only. At the request of researchers, unpublished data of completed studies or from preprints can also be included. Papers dealing only with analysis of previous experimental data can also be included. It is called “Unevaluated”, yet each paper goes through a critical compilation with partial evaluation within the context of the paper, and problems identified and resolved. However, no comparisons are made with papers from other labs on the same topic.
XUNDL: Procedures Identify articles: scanning of journal web pages on a daily basis. Identify data-related problems or lack of detailed data in a paper. If so, consult author(s) for clarification or obtaining data details. Extensive communications with authors have taken place with about 600 of these since 1999. Several errata have appeared as a result of these. For large data tables, commercial codes Finereader/Adobe-9 Professional used to scan and create tabular text files from PDF files downloaded from journal web pages. TABULAR-TEXT-to-ENSDF conversion code, developed at McMaster used to generate draft ENSDF-formatted data sets. Manual editing of draft data sets to add comments and other items. Manual preparation of data sets when no large tables. Data sets run through FMTCHK, GTOL, BrIcc (if necessary); and for decay datasets also through LOGFT codes.
XUNDL: Procedures Level schemes, bands, and other numerical data in the compiled data sets run through LBNL’s ISOTOPE-EXPLORER and/or BNL’s PANDORA. Finally all data sets checked manually. Sent to NNDC on a weakly basis. Dr. Tuli takes care of these there. Browse database by nuclide, mass number, index. Also by article through NSR database. However, no search capabilities as yet. Comments from users welcome. Corrections made if necessary.
XUNDL: Procedures At McMaster, most draft datasets are prepared by one or two undergraduate (first and second-year Physics) students, working full-time in summer and part-time during semesters. They also get an opportunity to participate in experimental work in nuclear astrophysics with Dr. Alan Chen. Students get training in basic nuclear physics, use of ENSDF, NSR databases; and all the computer codes related to ENSDF work. Undergraduate student participation for regular updating of XUNDL database is absolutely necessary.
The XUNDL Process Collect relevant data Mirror Nuclei: 31 P: spins and parities are not all correct based on recent evaluation. This is not mentioned in XUNDL dataset but will get discussed in ENSDF evaluation.
The XUNDL Process: calculational errors ( Reply received from authors August 1: matter resolved) 18 +7-8 44 +22-23 corrected +-14, not +4-3
The XUNDL Process: mammoths In Sept 2012 issue of PRC)
XUNDL Process : Extensive data received from authors 37 Ar: from ( 3 He,t): Gamow-Teller transitions: PRC 86, 024312 (Aug 27, 2012): Numerical data for σ(θ) ratios obtained for 148 levels + several corrections in data
Number of Papers by Year Year Number of Papers Number of Papers by Year Total:3120 papers; ~75% PRC
Current contents of XUNDL 4940 compiled datasets for 2136 nuclides 2136 nuclides: A=1-294 spread over 288 isobaric chains. (only A=2, 3, 4, 223, 275, 292 not represented) Data extracted from 3140 publications, mostly from 1998-2012 in primary nuclear physics journals. About 550 communications with original authors of papers to resolve data inconsistencies or errors, and to obtain additional details of data for completeness and archival purpose. This part of the activity is considered as most useful as it is timely and of interest to researchers and ENSDF evaluators.
Compilation of mass measurements Penning-trap systems and Radioactive-ion beam facilities have pushed the field of precise mass measurements very fast. Just in 2008-2012, about 95 primary publications in PRL/PRC have appeared for masses of about 500 nuclides, many of these far- off the stability line in chart of nuclides. ENSDF format unsuitable for mass papers. Since AME-2003 (NP-A 729, 337), ~ 125 papers have been compiled, with data for about 600 nuclides. Compiled data are available on ORNL web page: www.nuclearmasses.org. www.nuclearmasses.org There have been several requests from researchers for these compiled data files.
Future of XUNDL database I am retiring from McMaster July 1, 2013. Possible continuation at McMaster through funding from NNDC at BNL. Hopefully, work will continue as usual for the next few years. It is an extensive activity. Undergraduate students are a great help, still I check every number manually before the datasets are placed in XUNDL. Correspondence with original authors is extremely useful (I like to think on both sides of the fence), yet it is time consuming. I spend about 450 hours/year on this project.