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

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