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Title: Determining neutron capture cross sections via the surrogate reaction technique

Abstract

Indirect methods play an important role in the determination of nuclear reaction cross sections that are hard to measure directly. In this paper we investigate the feasibility of using the so-called surrogate method to extract neutron capture cross sections for low-energy compound-nuclear reactions in spherical and near-spherical nuclei. We present the surrogate method and develop a statistical nuclear reaction simulation to explore different approaches to utilizing surrogate reaction data. We assess the success of each approach by comparing the extracted cross sections with a predetermined benchmark. In particular, we employ regional systematics of nuclear properties in the 34{<=}Z{<=}46 region to calculate (n,{gamma}) cross sections for a series of Zr isotopes and to simulate a surrogate experiment and the extraction of the desired cross section. We identify one particular approach that may provide very useful estimates of the cross section, and we discuss some of the limitations of the method. General recommendations for future (surrogate) experiments are also given.

Authors:
 [1];  [2]; ; ; ;  [3]
  1. Fundamental Physics, Chalmers University of Technology, SE-41296 Goeteborg (Sweden)
  2. (United States)
  3. Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551 (United States)
Publication Date:
OSTI Identifier:
20995336
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.055807; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BENCHMARKS; CAPTURE; CROSS SECTIONS; EXTRACTION; NEUTRON REACTIONS; NUCLEAR PROPERTIES; NUCLEI; SIMULATION; SPHERICAL CONFIGURATION; ZIRCONIUM ISOTOPES

Citation Formats

Forssen, C., Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551, Dietrich, F. S., Escher, J., Hoffman, R. D., and Kelley, K. Determining neutron capture cross sections via the surrogate reaction technique. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.055807.
Forssen, C., Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551, Dietrich, F. S., Escher, J., Hoffman, R. D., & Kelley, K. Determining neutron capture cross sections via the surrogate reaction technique. United States. doi:10.1103/PHYSREVC.75.055807.
Forssen, C., Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551, Dietrich, F. S., Escher, J., Hoffman, R. D., and Kelley, K. Tue . "Determining neutron capture cross sections via the surrogate reaction technique". United States. doi:10.1103/PHYSREVC.75.055807.
@article{osti_20995336,
title = {Determining neutron capture cross sections via the surrogate reaction technique},
author = {Forssen, C. and Lawrence Livermore National Laboratory, P.O. Box 808, L-414, Livermore, California 94551 and Dietrich, F. S. and Escher, J. and Hoffman, R. D. and Kelley, K.},
abstractNote = {Indirect methods play an important role in the determination of nuclear reaction cross sections that are hard to measure directly. In this paper we investigate the feasibility of using the so-called surrogate method to extract neutron capture cross sections for low-energy compound-nuclear reactions in spherical and near-spherical nuclei. We present the surrogate method and develop a statistical nuclear reaction simulation to explore different approaches to utilizing surrogate reaction data. We assess the success of each approach by comparing the extracted cross sections with a predetermined benchmark. In particular, we employ regional systematics of nuclear properties in the 34{<=}Z{<=}46 region to calculate (n,{gamma}) cross sections for a series of Zr isotopes and to simulate a surrogate experiment and the extraction of the desired cross section. We identify one particular approach that may provide very useful estimates of the cross section, and we discuss some of the limitations of the method. General recommendations for future (surrogate) experiments are also given.},
doi = {10.1103/PHYSREVC.75.055807},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}