International Conference on Nuclear Data for Science and Technology 2007
DOI: 10.1051/ndata:07640

EMPIRE ultimate expansion: resonances and covariances

M. Herman¹, S.F. Mughabghab¹, P. Oblozinský¹, D. Rochman¹, M.T. Pigni¹, T. Kawano², R. Capote³, V. Zerkin³, A. Trkov⁴, M. Sin⁵, B.V. Carlson⁶, H. Wienke⁷ and Young-Sik Cho<sup>8

1</sup>  National Nuclear Data Center, Brookhaven National Laboratory, Upton, NY, USA
²  T-16, Los Alamos National Laboratory, Los Alamos, NM, USA
³  International Atomic Energy Agency, Nuclear Data Section, Vienna, Austria
⁴  Jozef Stefan Institute, Ljubljana, Slovenia
⁵  University of Bucharest, Bucharest, Romania
⁶  Instituto Tecnologico de Aeronáutica, São José dos Campos, Brazil
⁷  Belgonucleaire, 2480 Dessel, Belgium
⁸  Korea Atomic Energy Research Institute, Nuclear Data Evaluation Lab., Daejeon, Korea

mwherman@bnl.gov

Published online: 21 May 2008

Abstract
The EMPIRE code system is being extended to cover the resolved and unresolved resonance region employing prooven methodology used for the production of new evaluations in the recent Atlas of Neutron Resonances. Another directions of Empire expansion are uncertainties and correlations among them. These include covariances for cross sections as well as for model parameters. In this presentation we concentrate on the Kalman method that has been applied in EMPIRE to the fast neutron range as well as to the resonance region. We also summarize role of the EMPIRE code in the ENDF/B-VII.0 development. Finally, large scale calculations and their impact on nuclear model parameters are discussed along with the exciting perspectives offered by the parallel supercomputing.

© CEA 2008