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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: [email protected]
Brookhaven Science Associates
2Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
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
3Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
B(E2) Nuclear Data Project I
B(E2) (http://www.nndc.bnl.gov/be2) was
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%
4Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
B(E2) Nuclear Data Project II
Project is in a good shape Nuclear physicists requests:
Weisskopf units were introduced in
addition to e2b
2 and ps
Experimental methods are displayed
Database updates: 3-4 times a year
5Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
-decay Data Project I -decay (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
6Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
-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
7Boris Pritychenko NSDD Meeting, Saint-Petersburg,
Russia , June 11-15, 2007
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