Nuclear Wallet Cards and ENSDF compatibility Alejandro Sonzogni National Nuclear Data Center
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Transcript of Nuclear Wallet Cards and ENSDF compatibility Alejandro Sonzogni National Nuclear Data Center
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Alejandro Sonzogni NSDD 2007
Nuclear Wallet Cards and ENSDF compatibility
Alejandro Sonzogni
National Nuclear Data CenterBrookhaven National Laboratory
E-mail: [email protected]
Brookhaven Science Associates
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2Alejandro Sonzogni NSDD 2007
NWC-ENSDF Compatibility
Nuclear Wallet Cards
1) Major updates every 5 years
2) Minor updates at least once a year
ENSDF
1) Continuous updates
2) Can be out of synch with Wallet Cards in half-life, J, isomer energy and decay modes.
NuDat provides both NWC and ENSDF values, which can be confusing to users.
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3Alejandro Sonzogni NSDD 2007
NWC-ENSDF Compatibility
Example 1:
147Xe, exists in NWC but not in ENSDF.
Example 2:
146Xe has T1/2 and decay modes in NWC but the ENSDF file (10 years old, 1 level) has only incomplete decay mode.
Example 3:
108Ag isomer, NWC has more recent T1/2. Changing the ENSDF T1/2 will require running LOGFT and checking for J arguments.
Received many e-mails recently on this issue
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4Alejandro Sonzogni NSDD 2007
NWC-ENSDF Compatibility
Proposed action:
1) Check for NWC-ENSDF compatibility a few times a year in levels energy, T1/2, J and decay modes.
2) If NWC values are more up to date:
2.1) Communicate with ENSDF evaluator.
2.2) For cases where NO LOGFT/ALPHAD/RULER calculations are involved, (examples 1 and 2) the NNDC will perform the update with the original evaluator’s consent.
2.3) For more complex cases, original evaluator will be expected to perform changes within a few months. If evaluator is not available, the NNDC will do it. The NNDC may perform the update if the original evaluator so wishes.