RIPL - Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Nuclear Data Sheets

DOI:https://doi.org/10.1016/j.nds.2009.10.004· OSTI ID:21333987

Herman, M; Oblozinsky, P ^[1]; Young, P G ^[2]; Goriely, S ^[3]; Belgya, T ^[4]; Ignatyuk, A V ^[5]; Koning, A J ^[6]; Hilaire, S ^[7]; Plujko, V A ^[8]; Avrigeanu, M ^[9]; Bersillon, O ^[7]; Chadwick, M B ^[2]; Fukahori, T ^[10]; Ge, Zhigang; Han, Yinlu ^[11]; Kailas, S ^[12]; Kopecky, J ^[13]; Maslov, V M ^[14]; Reffo, G ^[15]

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1. NAPC-Nuclear Data Section, International Atomic Energy Agency, A-1400 Vienna (Austria)
2. Los Alamos National Laboratory, Los Alamos, NM 87544 (United States)
3. Universite Libre de Bruxelles, BE 1050 Brussels (Belgium)
4. Institute of Isotope and Surface Chemistry, Chemical Research Center, H-1525 Budapest (Hungary)
5. Institute of Physics and Power Engineering, 249033 Obninsk (Russian Federation)
6. Fuels Actinides and Isotopes NRG Nuclear Research and Consultance Group, NL-1755 Petten (Netherlands)
7. CEA, DAM, DIF, F-91297 Arpajon (France)
8. Taras Shevchenko National University, 03022 Kiev (Ukraine)
9. National Institute of Physics and Nuclear Engineering 'Horia Hulubei', 077125 Bucharest-Magurele (Romania)
10. Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki-ken, 319-1195 Japan (Japan)
11. China Institute of Atomic Energy, Beijing 102413 China (China)
12. Bhabha Atomic Research Center, Trombay, 400085 Mumbai (India)
13. JUKO Research, NL-1817 Alkmaar (Netherlands)
14. Joint Institute for Power and Nuclear Research - Sosny, BY-220109 Minsk (Belarus)
15. Retired in 1998, Ente Nuove Tecnologie, Energia e Ambiente (ENEA), 40129 Bologna (Italy)

We describe the physics and data included in the Reference Input Parameter Library, which is devoted to input parameters needed in calculations of nuclear reactions and nuclear data evaluations. Advanced modelling codes require substantial numerical input, therefore the International Atomic Energy Agency (IAEA) has worked extensively since 1993 on a library of validated nuclear-model input parameters, referred to as the Reference Input Parameter Library (RIPL). A final RIPL coordinated research project (RIPL-3) was brought to a successful conclusion in December 2008, after 15 years of challenging work carried out through three consecutive IAEA projects. The RIPL-3 library was released in January 2009, and is available on the Web through (http://www-nds.iaea.org/RIPL-3/). This work and the resulting database are extremely important to theoreticians involved in the development and use of nuclear reaction modelling (ALICE, EMPIRE, GNASH, UNF, TALYS) both for theoretical research and nuclear data evaluations. The numerical data and computer codes included in RIPL-3 are arranged in seven segments: MASSES contains ground-state properties of nuclei for about 9000 nuclei, including three theoretical predictions of masses and the evaluated experimental masses of Audi et al. (2003). DISCRETE LEVELS contains 117 datasets (one for each element) with all known level schemes, electromagnetic and {gamma}-ray decay probabilities available from ENSDF in October 2007. NEUTRON RESONANCES contains average resonance parameters prepared on the basis of the evaluations performed by Ignatyuk and Mughabghab. OPTICAL MODEL contains 495 sets of phenomenological optical model parameters defined in a wide energy range. When there are insufficient experimental data, the evaluator has to resort to either global parameterizations or microscopic approaches. Radial density distributions to be used as input for microscopic calculations are stored in the MASSES segment. LEVEL DENSITIES contains phenomenological parameterizations based on the modified Fermi gas and superfluid models and microscopic calculations which are based on a realistic microscopic single-particle level scheme. Partial level densities formulae are also recommended. All tabulated total level densities are consistent with both the recommended average neutron resonance parameters and discrete levels. GAMMA contains parameters that quantify giant resonances, experimental gamma-ray strength functions and methods for calculating gamma emission in statistical model codes. The experimental GDR parameters are represented by Lorentzian fits to the photo-absorption cross sections for 102 nuclides ranging from {sup 51}V to {sup 239}Pu. FISSION includes global prescriptions for fission barriers and nuclear level densities at fission saddle points based on microscopic HFB calculations constrained by experimental fission cross sections.

• OSTI ID: 21333987
• Journal Information: Nuclear Data Sheets, Vol. 110, Issue 12; Other Information: DOI: 10.1016/j.nds.2009.10.004; PII: S0090-3752(09)00099-4; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0090-3752
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
COMPUTER CODES
COMPUTERIZED SIMULATION
COORDINATED RESEARCH PROGRAMS
CROSS SECTIONS
ENERGY RANGE
ENERGY-LEVEL DENSITY
EVALUATION
EXPERIMENTAL DATA
FERMI GAS
FISSION
FISSION BARRIER
GAMMA RADIATION
GIANT RESONANCE
GROUND STATES
IAEA
MASS
NEUTRONS
NUCLEAR DATA COLLECTIONS
OPTICAL MODELS
PLUTONIUM 239
PROBABILITY
STATISTICAL MODELS
STRENGTH FUNCTIONS
SUPERFLUID MODEL
VANADIUM 51