prepared for the

                    IAEA Advisory Group Meeting of the
               Network of Nuclear Structure and Decay Data Evaluators
                    December 14-17, 1998, Vienna, Austria

I.  Mass-chain Evaluations

Within this Network, the INEEL has had the evaluation responsibility for
the twelve mass chains 87 and 153-163.  The participants in this work are
R. G. Helmer and C. W. Reich.  Since the last Network meeting in October
1996, we have submitted complete evaluations for A = 153 and 154 and these
have been added to ENSDF and published in Nuclear Data Sheets.   The
A-chain priority list prepared in July 1997 indicated that A = 161, 162,
and 163 had a significant number of new references and should be evaluated.
We are currently working on A = 162 and A = 163 is being done by B. Singh,
McMaster University.

The current status of our twelve A chains, as of October 1998, is as
follows:

     A    Last Pub. Date      Status

      87       2/91
     153       2/98
     154       9/98

     155       4/94
     156       1/92      3 nuclides updated
     157       6/96      1 nuclide updated

     158       3/96
     159       5/94
     160       8/96

     161       1/90           on priority list
     162       9/91      on priority list - in progress
     163       2/89      on priority list - in progress

II.  Nuclide Evaluations

In the last few years it has been decided that the currentness of ENSDF
would be improved by allowing, and in some cases encouraging, the
evaluation of the data for individual nuclides (e.g., ones with new
high-spin data).  In response to this desire, we have submitted evaluations
for nuclides not previously in ENSDF; these are 153La, 153Ce, 155Ce, 155Pr,
157Nd, and 158Nd.

We have also submitted nuclide evaluations for the nuclides on priority
lists including ¹⁵⁴Sm, ¹⁵⁴Yb, ¹⁵⁴Lu, ¹⁵⁴Hf, ¹⁵⁶Nd, ¹⁵⁶Tm, ¹⁵⁶Yb, ¹⁵⁷Tm,
¹⁶²Yb, and ¹⁶²Lu.  The A = 154 nuclides were subsequently included in the
new mass-chain evaluation.  Other nuclides on priority lists were submitted
as parts of A-chain evaluations including ¹⁵³Eu, ¹⁵³Dy, ¹⁵³Yb, ¹⁵³Lu,
¹⁵⁴Gd, ¹⁵⁴Dy, and ¹⁵⁴Ho.
 

III.  Decay Data Evaluation Project, DDEP

R. G. Helmer is the coordinator of an international group that is carrying
out evaluations of decay data for a group of nuclides that are important
for applications.  This Project was approved as part of the activities of
this Network in 1994.  This group includes evaluators that are not a part
of this Network from France, Germany, Russia, and the United Kingdom, as
well as E. Browne and J. K. Tuli who are United States participants in this
Network.

The members of the Project have completed the evaluations for 29 nuclides
and these will be included in a publication being prepared at Laboratoire
Primaire des Rayonnements Ionisants, LPRI, France.  Most of these
evaluations have not yet been entered into ENSDF.  Of these completed
evaluations, nine have been done at the INEEL; these are ²²Na, ⁴⁰K, ⁶⁰Co,
⁶⁵Zn, ⁹⁵Zr, ⁹⁵Nb, ¹¹³Sn, ¹³⁷Cs, and ¹³⁹Ce.  Eckart Schönfeld of PTB,
Germany was a coauthor of some of these evaluations.  Another eleven
radionuclides have been evaluated, but the final editing has not yet been
done.

This project has been publicized at several meetings including those of the
American Nuclear Society, the American Chemical Society, the International
Committee of Radionuclide Metrology, and Canberra Users' Group.

IV.  Related Activities

R. G. Helmer has been invited by the IAEA to participate in a Coordinated
Research Project, CRP, on the evaluation of decay data for nuclides used in
the calibration of Ge gamma-ray detectors.  It is expected that this CRP
will use the methodologies and results of the above Decay Data Evaluation
Project.  Therefore, these efforts will be coordinated and will not produce
different results.

R. G. Helmer and Cor van der Leun (recently deceased) have prepared an
evaluation of precise gamma-ray energies that are useful for the
calibration of Ge gamma-ray spectrometers.  It is expected that this
article will be submitted for publication late in 1998.

When he died in October 1997, R. L. Heath of the INEEL was preparing an
electronic version of his earlier Gamma-ray Spectrum Catalogue for Ge(Li)
and Si(Li) detectors.  This project has been completed.

A paper of delayed neutron spectra of ⁸⁷Br, ⁸⁸Br, ⁸⁹Br, ⁹⁰Br, ¹³⁷I, ¹³⁸I,
¹³⁹I, and ¹³⁶Te has been published by R. C. Greenwood and K. D. Watts in
Nuclear Science and Engineering 126 (1997) 324.