The Baghdad Atlas

This project is based on the original (n,n'γ) measurements carried out by A.M. Demidov et al. [1]. The resulting datasets are compiled into a set of CSV-style files and Python scripts are provided to build a corresponding SQLite relational database. A data-retrieval example for the Fe data is shown in comparison to the measured Fe spectrum in the figure below.

Measured Fe spectrum	Database-retrieved Fe data

This project is described in detail in the reference article The Baghdad Atlas: A relational database of inelastic neutron-scattering (n,n'γ) data by A.M. Hurst et al. [2]. Absolute cross sections for all transitions in the Baghdad Atlas can be derived relative to the flux-weighted cross section deduced for the 2⁺ $\rightarrow$ 0⁺_gs transition in ⁵⁶Fe [2]; the normalization transition of the Atlas. The characterized flux used in this determination is shown in comparison to the measured flux at the IRT-M Baghdad Research Reactor in the figure below.

The complete software package includes the following:

(i) Scripts to compile the data into a SQLite database for both Python2 and Python3. The Makefile provided will determine the appropriate version.

(ii) A C program to produce the extension-functions library allowing for mathematical functions (e.g., square root, trigonometry, logarithm) to be invoked that are not standard methods with the SQLite3 engine. The `Makefile' will establish the OS kernel name and compile the library accordingly.

(iii) The complete set of CSV-style data files compiled for nuclei within the range Z=3-92; a total of 105 data sets comprising 76 natural-sample and 29 isotopically-enriched measurements.

(iv) A Jupyter Notebook illustrating methods for interacting with and visualizing the data.

(v) A suite of SQL scripts is also provided to illustraste database-interaction methods using the SQLite interpreter. The OS-dependent library providing enhanced functionality with SQLite3 methods will be defined automatically during installation.

(vi) A PDF of the original Atlas [1978De41] and the corresponding NIMA reference article [2021Hu05] is also provided.

(vii) An HTML manual describing the software installation procedure and data-access methods. An overview of the Atlas data is also provided in the documentation.

For further information regarding this Atlas, including detailed installation and utilization, please refer to document/index.html.

Building and installation

This project should be built after cloning the repository at the terminal command line of the src directory:

$ git clone https://github.com/AaronMHurst/baghdad_atlas.git
$ cd baghdad_atlas/src
$ make && make run && make install

For clean-up operations type:

$ make help

References:

[1] A.M. Demidov, I. Govor, Yu. K. Cherepantsev, M.R. Ahmed, S. Al-Najjar, M.A. Al-Amili, N. Al-Assafi, N. Rammo, "Atlas of Gamma-Ray Spectra from the Inelastic Scattering of Reactor Fast Neutrons", Nuclear Research Institute, Baghdad, Iraq (Moscow, Atomizdat 1978).

[2] A.M. Hurst, L.A. Bernstein, T. Kawano, A.M. Lewis, K. Song, "The Baghdad Atlas: A relational database of inelastic neutron-scattering (n,n'γ) data", Nucl. Instrum. Methods Phys. Sect. A 995, 165095 (2021).