IAEA Evaluated Photonuclear Data Library (IAEA/PD-2019)

IAEA Coordinator: Paraskevi (Vivian) Dimitriou    Library released on August 14, 2020  (Last updated on August 14, 2020).

CRP participants:
P. Oblozinsky (chair), P. Dimitriou, S. Goriely, Xu Ruirui, Tian Yuan, M. Krticka, R. Schwengner, T. Belgya, N. Iwamoto, H. Utsunomiya, Y.S. Cho, J. Kopecky, S. Siem, R. B. Firestone, T. Kawano, D. M. Filipescu, V.V. Varlamov, V. Plujko

IAEA/PD-2019 REFERENCE:
T. Kawano, Y.S. Cho, P. Dimitriou, D. Filipescu, N. Iwamoto, V. Plujko, X. Tao, H. Utsunomiya, V. Varlamov, R. Xu, R. Capote, I. Gheorghe, O. Gorbachenko, Y.L. Jin, T. Renstrm, M. Sin, K. Stopani, Y. Tian, G.M. Tveten, J.M. Wang, T. Belgya, R. Firestone, S. Goriely, J. Kopecky, M. Krticka, R. Schwengner, S. Siem and M. Wiedeking, Nuclear Data Sheets 163 (2020) 109-162. Also available as a preliminary version at arXiv 1908.00471 (2019).

Overview

Photo-induced reaction cross section data are of importance for a variety of current or emerging applications, such as radiation shielding design and radiation transport analyses, calculations of absorbed dose in the human body during radiotherapy, physics and technology of fission reactors (influence of photo-reactions on neutron balance) and fusion reactors (plasma diagnostics and shielding), activation analyses, safeguards and inspection technologies, nuclear waste transmutation, medical isotope production and astrophysical applications.
A new Evaluated Photonuclear Library PD-2019 was produced by the IAEA Coordinated Research Project (CRP). Extensive experimental measurements were also undertaken under the project which was of great help for new evaluations. In particular, collaboration measurements undertaken at the LCS NewSUBARU facility (Laboratory of Advanced Science and Technology for Industry, University of Hyogo, Japan) were critical for the success of the project. Both experimental and evaluation efforts carried out within the CRP to update the IAEA Photonuclear Data Library are explained in Kawano et al., Nuclear Data Sheets 163 (2020) 109-162. The new library includes 199 mostly new evaluations, 20 evaluations were retained from the previous 1999 IAEA Photonuclear Data Library (IAEA/PD-1999).

Contents

The library contains evaluated photonuclear data for 219 isotopes for incident photons (gamma rays) with energies mostly up to 200 MeV. The list of the files are available here. The library includes cross sections and emission spectra in ENDF-6 format. The file format description is explained in the report IAEA-NDS-0232. The ENDF-6 formatted individual evaluations are available at IAEA Github site. The complete ENDF-6 library can also be downloaded as a compressed (tgz) archive. To untar the files, use the command tar -zxvf filename.tar.gz on Unix or MacOS.

Derived transport and activation libraries

The production of application libraries from the ENDF-6 formatted files was undertaken at the IAEA Nuclear Data Section by H. Kawada (Tokyo Institute of Technology, Japan), J.-Ch. Sublet and S. Okumura (IAEA), and T. Kawano (LANL, USA), and is described in the report on "Processing of the Evaluated Photonuclear Data Library (IAEA-PD2019)" available as IAEA-NDS-0232. The processed IAEA/PD-2019 transport libraries and the processed activation libraries can be also retrieved from the IAEA Github as individual files (*.endf, *.pdf, etc) and tar compressed file (*.tar.gz) as follows.

File type Filename (.tar.gz) List of files (Github)
ENDF-6 Library iaea-pd2019.tar.gz ENDF-6 list
ACE Application Library (NJOY2016*) ace.tar.gz ACE list
iaeapd19ace.xs (XSDIR index file)
ACER check/plot (NJOY plots) acerplot.tar.gz ACE plot list
EVAPLOT check/plot (Activation) graphs.tar.gz Activation plot list
FISPACT-II 162 gprs files
gxs-162.tar.gz
Activation file list
Linearised ENDF file (PENDF) hendf.tar.gz PENDF file list

Updated on September 13, 2020. Note that the processing of the IAEA/PD-2019 for transport makes uses of a "patched version of NJOY2016", which is available under Github branch (feature/pn-iaea) of NJOY2016. With this version the evaluated data files can be processed, but the angular distributions in continuum spectra of emitted particles are converted to isotropic in the processing, when angular dependence of the emitted particle is represented by Legendre polynomials. See details in the NJOY2016 #issue. This deficiency is present in practically all IAEA/PD-2019 files, which as a rule represent the angular dependence of the emitted particle continuum spectra in this representation. As soon as a complete patch for NJOY2016 is released, the ACE transport library will be updated accordingly. The employed approximation in NJOY has no impact on the calculated cross sections, but may affect applications where angular distribution of emitted particles (especially neutrons) is important. There are no other nuclear data processing systems currently capable of producing ACE libraries for photon induced reactions.