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Title: Verification of R-matrix calculations for charged-particle reactions in the resolved resonance region for the 7Be system

Abstract

R-matrix theory is used to present nuclear reactions in the resolved resonance region. It uses information on bound states and low energy resonances to accurately parametrize cross sections on the resonances as well as the non-resonant background. Since the seminal work of Lane and Thomas (1958), the method has been widely used to analyze experimental cross-section data in a broad range of fields spanning nuclear reaction dynamics, nuclear astrophysics, ion beam analysis and their applications. Different R-matrix codes have been developed and used in these different applications with very little communication among the developers or practitioners on the capabilities, achievements or limitations of the codes. A limited comparison among three R-matrix codes on neutron-induced reactions was performed by the International Atomic Energy Agency (IAEA) International Evaluation of Neutron Cross Section Standards project (2007). Since then, significant progress has been made in their implementation of the R-matrix algorithms, and R-matrix codes have enhanced capabilities. In this paper we introduce, for the first time, the results of a comprehensive effort to verify the most widely used R-matrix codes in the various fields of nuclear science and applications: AMUR, AZURE2, CONRAD, EDA, FRESCO, GECCCOS, and SAMMY. In addition to the description of themore » capabilities of the codes and their specifications, we discuss the results of a joint exercise which was coordinated by the International Atomic Energy Agency. The aim of the exercise was to compare calculations of charged-particle reaction cross sections for the light composite system 7Be. The calculations were performed by the codes using identical input R-matrix parameters and other specifications and were limited to charged-particle channels.« less

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [5];  [6];  [6];  [7];  [8];  [8]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Notre Dame, IN (United States)
  3. Intl Atomic Energy Agency (IAEA), Vienna (Austria)
  4. Japan Atomic Energy Agency (JAEA), Tokai (Japan)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Technische Univ. Wien, Vienna (Austria)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. Alternative Energies and Atomic Energy Commission (CEA), Cadarache (France)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1526854
Alternate Identifier(s):
OSTI ID: 1528694
Report Number(s):
LLNL-JRNL-765198
Journal ID: ISSN 1434-6001; 955052
Grant/Contract Number:  
AC52-07NA27344; Phys-0822648; Phys-0758100; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 55; Journal Issue: 6; Journal ID: ISSN 1434-6001
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Thompson, Ian J., deBoer, R. J., Dimitriou, Paraskevi, Kunieda, Satoshi, Pigni, Marco T., Arbanas, Goran, Leeb, H., Srdinko, Thomas, Hale, G., Tamagno, Pierre, and Archier, Pascal. Verification of R-matrix calculations for charged-particle reactions in the resolved resonance region for the 7Be system. United States: N. p., 2019. Web. doi:10.1140/epja/i2019-12753-y.
Thompson, Ian J., deBoer, R. J., Dimitriou, Paraskevi, Kunieda, Satoshi, Pigni, Marco T., Arbanas, Goran, Leeb, H., Srdinko, Thomas, Hale, G., Tamagno, Pierre, & Archier, Pascal. Verification of R-matrix calculations for charged-particle reactions in the resolved resonance region for the 7Be system. United States. doi:10.1140/epja/i2019-12753-y.
Thompson, Ian J., deBoer, R. J., Dimitriou, Paraskevi, Kunieda, Satoshi, Pigni, Marco T., Arbanas, Goran, Leeb, H., Srdinko, Thomas, Hale, G., Tamagno, Pierre, and Archier, Pascal. Mon . "Verification of R-matrix calculations for charged-particle reactions in the resolved resonance region for the 7Be system". United States. doi:10.1140/epja/i2019-12753-y.
@article{osti_1526854,
title = {Verification of R-matrix calculations for charged-particle reactions in the resolved resonance region for the 7Be system},
author = {Thompson, Ian J. and deBoer, R. J. and Dimitriou, Paraskevi and Kunieda, Satoshi and Pigni, Marco T. and Arbanas, Goran and Leeb, H. and Srdinko, Thomas and Hale, G. and Tamagno, Pierre and Archier, Pascal},
abstractNote = {R-matrix theory is used to present nuclear reactions in the resolved resonance region. It uses information on bound states and low energy resonances to accurately parametrize cross sections on the resonances as well as the non-resonant background. Since the seminal work of Lane and Thomas (1958), the method has been widely used to analyze experimental cross-section data in a broad range of fields spanning nuclear reaction dynamics, nuclear astrophysics, ion beam analysis and their applications. Different R-matrix codes have been developed and used in these different applications with very little communication among the developers or practitioners on the capabilities, achievements or limitations of the codes. A limited comparison among three R-matrix codes on neutron-induced reactions was performed by the International Atomic Energy Agency (IAEA) International Evaluation of Neutron Cross Section Standards project (2007). Since then, significant progress has been made in their implementation of the R-matrix algorithms, and R-matrix codes have enhanced capabilities. In this paper we introduce, for the first time, the results of a comprehensive effort to verify the most widely used R-matrix codes in the various fields of nuclear science and applications: AMUR, AZURE2, CONRAD, EDA, FRESCO, GECCCOS, and SAMMY. In addition to the description of the capabilities of the codes and their specifications, we discuss the results of a joint exercise which was coordinated by the International Atomic Energy Agency. The aim of the exercise was to compare calculations of charged-particle reaction cross sections for the light composite system 7Be. The calculations were performed by the codes using identical input R-matrix parameters and other specifications and were limited to charged-particle channels.},
doi = {10.1140/epja/i2019-12753-y},
journal = {European Physical Journal. A},
number = 6,
volume = 55,
place = {United States},
year = {2019},
month = {6}
}

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