NuDat 2

NuDat allows users to search and plot nuclear structure and nuclear decay data interactively

NuDat 2 is a software product that allows to search and plot nuclear structure and nuclear decay data interactively. NuDat 2 was developed by the National Nuclear Data Center (NNDC). It provides an interface between web users and several databases containing nuclear structure, nuclear decay and some neutron-induced nuclear reaction information.

Using NuDat 2, it is possible to search for nuclear level properties (energy, half-life, spin-parity), gamma-ray information (energy, intensity, multipolarity, coincidences), radiation information following nuclear decay (energy, intensity, dose), and neutron-induced reaction data from the BNL-325 book (thermal cross section and resonance integral).

The information provided by NuDat 2 can be seen in tables, level schemes and an interactive chart of nuclei.

There are three different search forms: one for levels and gammas, a second one for decay-related information, and a third one for searching the Nuclear Wallet Cards file. A description of the search capabilities can be found by clicking the help link at the top of each form, or by following the following links:

  • Help on Levels and Gammas search
  • Help on Nuclear Wallet Cards search
  • Help on Decay Radiation search

The sections of NuDat 2 related to levels, gammas and decay are obtained from the Evaluated Nuclear Structure Data File (ENSDF). Physicists from around the world have been contributing to this effort. The management and location of ENSDF resides at the NNDC. NuDat 2 is periodically updated to reflect changes in ENSDF.

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Resource Characteristics

Last Resource Update : 2012


Organizational Source
NAPC - Nuclear Data Section

Data Type
Codes and Numerical Data

Decay radiations, nuclear data display, level scheme, half-life, nuclear decay data display, nuclear structure data