1. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 B(E2) and ββ-decay evaluation and compilation Boris Pritychenko* National Nuclear Data Center Brookhaven National Laboratory *Email: pritychenko@bnl.gov Brookhaven Science Associates

2. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 2 Project Motivation  Up-to-date  -decay and B(E2) evaluation and compilation  Web Access & Dissemination  ENSDF evaluators & physicists need this information  Utilization of my expertise in these subjects

3. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 3 B(E2) Nuclear Data Project I  B(E2) ( http://www.nndc.bnl.gov/be2 ) was http://www.nndc.bnl.gov/be2 launched 11/01/2005  Originally based on work of S. Raman  Over 200 nuclear data retrievals/month  Adopted retrievals - 72.6%  Experimental retrievals - 21.6%  Theoretical retrievals - 5.8%

4. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 4 B(E2) Nuclear Data Project II  Project is in a good shape  Nuclear physicists requests:  Weisskopf units were introduced in addition to e 2 b 2 and ps  Experimental methods are displayed  Database updates: 3-4 times a year

5. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 5  -decay Data Project I   -decay ( http://www.nndc.bnl.gov/bbdecay ) http://www.nndc.bnl.gov/bbdecay was launched 06/01/2006  Small scale (14 adopted & over 300 best experimental limits)  Duration of typical  -decay measurement is 2-3 years; database content grows slow  Collaboration with Viktor Tretyak from INR, Kiev  Reliable source of data for ENSDF

6. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 6  -decay Data Project II  NSR-based product; NSR was 95% complete for bb-decay transitions, new NSR entries were added  Lweight was used for adopted values   -decay transitions page based on data from AMDC & NWC  Database updates 3-4 times a year

7. Boris Pritychenko NSDD Meeting, Saint-Petersburg, Russia, June 11-15, 2007 7 Conclusion & Outlook  Horizontal evaluations diversify NNDC product offering  Proactive response to research & ENSDF communities needs  Integration of B(E2) &  -decay data with NSR and ENSDF evaluations  FY 2009-2010: Produce B(E2) &  -decay evaluations for publication