Guidelines for the evaluation of A=84 nuclides
ENSDF-09 Workshop, IFIN-HH, Bucharest
March 30, 2009 to April 3, 2009
Prepared by Balraj Singh (Coordinator for A=84 ENSDF evaluation)
with help from
Filip Kondev, Aurelian Luca, Alexandru Negret and Jagdish Tuli
(February 15, 2009; updated March 5, 2009)
Useful websites:
ENSDF-09 workshop:
http://tandem.nipne.ro/~workshop_ensdf/
NNDC, BNL website:
http://www.nndc.bnl.gov/
ENSDF, XUNDL website: http://www.nndc.bnl.gov/ensdf/
NSR website:
http://www.nndc.bnl.gov/nsr/
ENSDF, NSR evaluators' corner website:
http://www.nndc.bnl.gov/nndc/evalcorner/
ANU website for Avetools (averaging procedures) and interactive BrIcc:
http://www.rsphysse.anu.edu.au/~txk103/
Trieste ENSDF-08 workshop: http://www-nds.iaea.org/workshops/smr1939/
Section I: General guidelines
1. As mentioned earlier, having your own laptop computer will be useful. Download
codes of common usage from the NNDC website, such as: FMTCHK, GTOL, BRICC,
LOGFT, PANDORA, RULER, ENSDAT. Download AVETOOLS from the ANU
website; it has interactive BrIcc code also.
Note that all editing of ENSDF data files is in text mode with an 80-column record
size, so bring along whatever text-editor you are comfortable with. Numeric quantities
are mostly entered in pre-defined columns, thus it is necessary to have a display of
column number of the cursor location. It is also useful to have line number displayed.
2. Have a print copy of ENSDF manual: download it from the workshop website or
from NNDC website.
3. Read through policies, procedures, JPI rules, etc. on a document posted on the
workshop website. This document is also available elsewhere e.g. in every January
issue of NDS, Trieste ENSDF workshops, etc.
4. In early February, Filip Kondev (ANL) suggested that the exercise component in the
workshop should involve an evaluation of a mass chain which, after completion, could
be published in NDS as a joint effort. Thereafter, I looked for a suitable mass chain
for the workshop and came up with A=84 for the following reasons: the last ENSDF
evaluation was published ~12 years ago: NDS 81, 331 (1997) by J.K. Tuli (lecturer
and mentor at the workshop); extensive experimental and theoretical work has been
done on A=84 nuclides and in this mass region over the last 30 or so years by Dorel
Bucurescu (one of the local organizers of this workshop) and his colleagues at IFINHH; and last, but not the least, it is a manageable size mass chain for the purpose of a
one week workshop. Moreover, it offers a great opportunity to have local experts
available for consultation on nuclear structure issues in this mass region!
Although the evaluation of this mass chain may not be completed during the week of
the workshop, it is expected that the trainees will continue work on the nuclei assigned
to them in consultation with their guides with the hope of completing the mass
chain by June 2009 or so. It is encouraging to note that the local organizers of this
workshop and the lecturers have responded favorably to this activity.
5. A=84 has 12 experimentally known nuclides: Ga to Mo (Z=31-42, N=53-42).
6. 84Ga (Z=31), 84Ge (Z=32), 84As (Z=33), 84Br (Z=35) and 84Mo (Z=42) have limited
data and, thus, they have short data files. These can be done during discussions in a
group setting during the workshop week. I will try to bring all relevant reference
material and possibly first drafts of updated datasets for these five nuclides.
7. 84Kr, 84Sr, 84Rb and 84Zr have large data files. Each of the first three nuclides is being
assigned to two trainees. 84Zr is being assigned to one trainee because this nuclide was
re-evaluated for ENSDF in 2006, but was not published in NDS.
84
Se, 84Y and 84Nb have moderate size data files. New high-spin data are available for
Se and 84Nb. 84Se is assigned to two trainees; 84Y and 84Nb each to one trainee.
84
TABLE: The above seven nuclides are assigned as in the table below:
NUCLIDE
GUIDE
TRAINEE
84
Se (Z=34,N=50)
Alejandro Sonzogni
Manssour Fadil (GANIL, France)
(BNL, USA)
Bernd Pfeiffer (GSI, Germany)
84
Kr (Z=36,N=48)
Jagdish Tuli
Sakari Juutinen (JYFL, Finland)
(BNL, USA)
Aurelian Luca (IFIN-HH, Romania)
84
Rb (Z=37,N=47)
Filip Kondev
(ANL, USA)
84
Sr (Z=38,N=46)
84
Y (Z=39,N=45)
Balraj Singh
Sefa Erturk (Nigde, Turkey)
Tsanka Venkova (INRNE, Bulgaria)
(McMaster, Canada)
Alexandru Negret (IFIN-HH, Romania)
Kazimir Zuber (Krakow, Poland)
Ninel Nica
Melih Bostan (Istanbul, Turkey)
(Texas A&M, USA)
84
Zr (Z=40,N=44)
Tibor Kibedi
Janos Timar (ATOMKI, Hungary)
(ANU, Australia)
84
Nb (Z=41,N=43)
Daniel Abriola
(IAEA, Austria)
Monica Galan (LMRI, CIEMAT, Spain)
8. Quite a lot of reference material for A=84 has been posted on the workshop
website under “downloads”. Please consult this website. Excellent online library
facilities exist at IFIN-HH institute and hopefully each work station will have free
access to internet. According to Aurelian Luca, all volumes of the following journals
are available online through their Institute library: PR-C, PRL, NP-A and NP, EPJ-A,
PL-B and PL, JP-G. Others: ZP-A (1997 year), Acta Phys. Pol. (1982-2009), Bull.
Russ. Acad. Sci. Phys. (2007-2009), Phys. Atomic Nuclei (2000-2008).
Print copies of older issues will be difficult to obtain because the Institute library is in
the process of moving to another location; all journal volumes are currently packed in
boxes and the move will not be complete by the time of the workshop.
It is recommended that copies of all relevant articles in electronic form or
otherwise (especially the ones not available on internet through IFIN-HH library) for
the nuclide assigned to you be procured between you and your guide before the
workshop. If you are unable to find any articles (e.g. secondary references and from
journals hard to get), please let me (ndgroup@mcmaster.ca) or Jagdish Tuli
(tuli@bnl.gov) know in advance so that we may try to get copies.
Section II: STARTING RE-EVALUATION OF A=84
1. Download a published copy of the 1997 Nuclear Data Sheets for A=84 from the
workshop website. The tables/drawings copy of the interim re-evaluation of 84Zr
in 2006 can also be downloaded from the workshop website.
2. Download the present ENSDF data file either from the workshop website or from
NNDC’s evaluators’ corner website. Important note: for re-evaluation the original
ENSDF data files as submitted by the evaluators should be used and not the ones on
NNDC’s www.nndc.bnl.gov/ensdf/ website, as the latter are translated versions of
ENSDF dictionary and upper case typing converted to lower case.
3. Download XUNDL data files for A=84 nuclides from workshop website or from
www.nndc.bnl.gov/ensdf/
4. Bibliography for A=84 nuclides: reference file for each known nuclide of A=84 has
been retrieved from NSR database at NNDC, BNL and posted in the workshop
webpage. Included are also “measured only” references for nuclides where the
reference files are large (more than 100 or so total references), cumulative list of
references, ordered by Z number from Jan 1, 1996 onwards, and a list of pre-1960
references.
You can also do your own retrievals for your nuclide from NSR database at
http://www.nndc.bnl.gov/nsr/. Most attendees are probably familiar with retrieval
procedures from this database. A few hints for retrievals for ENSDF evaluation
purposes: use “Other search options” NOT “Quick search”; click “Index search”.
Under “Initialization parameters” three boxes are useful: “Primary only”,
“Required measured quantity”, and “Search entries added since”
Under “Search parameters” two boxes are useful: “none” has a dropdown menu to
select an item of search e.g. nuclide; the empty box next to it is where you enter the
search item e.g. 84kr. Using this procedure, retrieve four reference lists for the nuclide
assigned to you. (There are several other search options but for now we will focus on
search by ‘nuclide’ only.)
● List A: All references (primary + secondary; experiment + theory)
by unchecking “primary only”; and leaving blank “Required measured quantity”.
● List B: All experimental references (primary + secondary) by checking
“Required measured quantity”.
● List C: By using “combine/view list” option (list A and not B) in NSR database
get a list of references dealing only with calculations (structure and reactions)
and analyses.
● List D: New references (primary + secondary; experiment + theory) since the last
evaluation by unchecking “primary only”; and leaving blank “Required measured
quantity”; entered since April 1, 1996 by clicking the “Search entries added
since” button and entering a date. (The 1997-NDS specifies a cutoff date of
April 1997, but it is better to search NSR about a year prior to that to catch
any missed references during the publication process of previous NDS.)
Note that list D is a subset of list A+B, containing references entered in NSR
after April 1996. Since this list will not be long (<50 references or so), it will
not be necessary to extract a list of experimental papers from list D.
● Read through the keywords of experimental references in list D (references
since the last update of A=84) and pre-1977 references in list B to determine
which ones are most relevant for ENSDF evaluation. Many of the references that
deal with measurements of reaction cross sections and isotopic yields only will
not be relevant, though some may have isotopic half-life measurements
(as may be indicated in keywords). Also, many of the secondary references
(conference proceedings, lab reports, preprints, etc.) may have been superseded
by regular publications.
● Bring along electronic (or print) copies of all the relevant references from list D
and pre-1997 references in list B. See also point #8 above in section I.
5. Determine from list D what is new and not covered in the present ENSDF data file
(see point #2 above in section I). Check also the references cited in the papers of
list D. It is possible that NSR database may have missed a reference.
6. Create new datasets or update exiting ones based on new experimental papers.
Consult XUNDL database for compiled datasets from recent papers. It is
recommended that the XUNDL datasets be thoroughly checked and edited if
necessary for data and comments prior to including these in your evaluation.
7. Check the presentation of data and comments for datasets in previous ENSDF
data files which have no new papers/data to add. You may wish to present the data in
a different way or to reword previous comments. Also check pre-1997 references in
list B for any significant references that may have been missed in the earlier A=84
ENSDF data file.
8. Create/update Adopted Levels, Gammas dataset.
9. Some references e.g. analyses of some experimental data, nuclear structure
calculations, systematics, etc. in list C and theoretical papers in list D may have
to be cited.
REMEMBER THAT YOUR REVISED EVALUATION IN ENSDF DATABASE AND NDS WILL
BECOME YOUR RESPONSIBILITY AND NOT THAT OF THE EVALUATOR OF 1997-NDS!
References used extensively in ENSDF evaluations for global nuclear properties such
as atomic masses, Q values, moments, etc.
1. 2003Au03: NP-A 729, 337 (2003): AME-2003
2. 2003Wa32: NP-A 729, 129 (2003): AME-2003: input values, procedures.
3. 2003Au02: NP-A 729, 3 (2003): NUBASE
4. 2005St24: ADNDT 90, 75 (2005): Nuclear (static) moments: compilation.
5. 1989Ra17: ADNDT 42, 189 (1989): Nuclear (static) moments: evaluation.
6. 2004An14: ADNDT 87, 185 (2004): RMS radii: evaluation.
7. 2001Ra27: ADNDT 78, 1 (2001): First 2+, E2 transition probabilities: evaluation
8. 2005Ki02: ADNDT 89, 77 (2005): 0+ to 0+ ; E0 transitions: evaluation
9. 2002Ki06: ADNDT 80, 35 (2002): First 3-, E3 transition probabilities: evaluation
10. 2002Tr04: ADNDT 80, 83 (2002): Double beta decay: compilation
11. 2008Ki07: NIM-A 589, 202 (2008): BrIcc calculations: theory and analysis.
12. 1997Mo25: ADNDT 66, 131 (1997): Calculated T1/2, Q values, beta decay, etc.
LET US HOPE IT ALL WORKS!