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Nuclear Wallet Cards and ENSDF compatibility Alejandro Sonzogni National Nuclear Data Center Brookhaven National Laboratory E-mail: sonzogni@bnl.gov. Brookhaven Science Associates. NWC-ENSDF Compatibility. Nuclear Wallet Cards 1) Major updates every 5 years

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Nuclear Wallet Cards and ENSDF compatibility

Alejandro Sonzogni

National Nuclear Data Center

Brookhaven National Laboratory

E-mail: sonzogni@bnl.gov

Brookhaven Science Associates

nwc ensdf compatibility
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, Jp, isomer energy and decay modes.

NuDat provides both NWC and ENSDF values, which can be confusing to users.

nwc ensdf compatibility1
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 Jp arguments.

Received many e-mails recently on this issue

nwc ensdf compatibility2
NWC-ENSDF Compatibility

Proposed action:

1) Check for NWC-ENSDF compatibility a few times a year in levels energy, T1/2, Jp 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.