Nudel is a parser for the Evaluated Nuclear Structure Data File (ENSDF) format implemented in Python.

ENSDF provides recommended nuclear structure and decay information. The data are organized in a special data format that is described here. Nudel is an attempt to read those files such that the relevant information can be easily accessed using Python, without having to worry about the details of the (complicated) data format. The specification is quite extensive, and thus, the present approach is currently limited to only a few important quantities. Especially cross-references and comments are not yet properly resolved.

To use nudel, a copy of the ENSDF is currently required. It can be obtained here. Extract the archive to $XDG_DATA_HOME/ensdf. Usually, this path corresponds to ~/.local/share/ensdf. You should end up with files such as ~/.local/share/ensdf/ensdf.208, etc. Alternatively, you can set $ENSDF_PATH to point to a different directory for the data.

• python>=3.7
• pytest (optional, only for unit tests)

No further libraries are required!

This is a minimal usage example, documentation will be improved in a future version:

from nudel import Nuclide

molybdenum94 = Nuclide(94, 42)

Notebooks with usage examples can be found in the examples/notebooks directory.

Copyright © 2019

O. Papst

This code is distributed under the terms of the GNU General Public License v3 or later. See the COPYING file for more information.