Abstract
Neutron capture cross sections in the continuum region above neutron energies of 1 keV have been difficult to calculate accurately, and measurements are needed for accurate results. Recent capture measurements on 234, 236, 238U and 239Pu made using the DANCE detector have resolved some discrepancies in the 235U and 239Pu capture cross sections. In addition, measurements of the gamma-ray emission spectra from capture are shown to provide an additional constraint on photon strength functions. Using strength functions constrained by the gamma-ray spectra, cross-section calculations can be made that reproduce the measurements with no additional renormalization.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
M.R. Mumpower et al., Estimation of M1 scissors mode strength for deformed nuclei in the medium to heavy mass region by statistical Hauser-Feshbach model calculations. Phys. Rev. C 96, 024612 (2017)
S. Hilaire, S. Goriely, Towards more predictive nuclear reaction modelling, in Proceedings of the 6th International Workshop on Compound-Nuclear Reactions and Related Topics (Springer International Publishing, Cham, 2020)
F. Bečvář, Simulation of γ cascades in complex nuclei with emphasis on assessment of uncertainties of cascade-related quantities. Nucl. Instr. Meth. A 417, 434 (1998)
M. Jandel et al., GEANT4 simulations of the DANCE array. Nucl. Instru. Meth. B 261, 1117 (2007)
T. Kawano, P. Talou, M.B. Chadwick, T. Watanabe, Monte Carlo simulation for particle and γ-ray emissions in statistical Hauser-Feshbach model. J. Nucl. Sci. Technol. 47, 462 (2010)
J. Kopecky, M. Uhl, Test of gamma-ray strength functions in nuclear reaction model calculations. Phys. Rev. C 41, 1941 (1990)
M. Herman et al., EMPIRE-3.2 Malta (rev.1) Modular system for nuclear data calculations and nuclear data evaluation User’s Manual, INDC(NDS)-0603, 2015. Nucl. Data Sheets 108, 2655 (2007). www-nds.iaea.org/empire/resources/empire.pdf
M. Guttormsen et al., Scissors resonance in the quasicontinuum of Th, Pa, and U isotopes. Phys. Rev. C 89, 014302 (2014)
J.L. Ullmann et al., Cross section and γ-ray spectra for 238 U(n, γ) measured with the DANCE detector array at the Los Alamos Neutron Science Center. Phys. Rev. C 89, 034603 (2014)
J.L. Ullmann et al., Constraining the calculation of 234, 236, 238U(n,γ) cross sections with measurements of the gamma-ray spectra at DANCE. Phys. Rev. C 96, 024627 (2017)
J. Kroll et al., Strength of the scissors mode in odd-mass Gd isotopes from the radiative capture of resonance neutrons. Phys. Rev. C 88, 034317 (2013)
S.S. Dietrich, B.L. Berman, Atlas of photoneutron cross sections obtained with monoenergetic photons. At. Data Nucl. Data Tables 38, 199 (1988)
T. Kawano, S. Chiba, H. Koura, Phenomenological nuclear level densities using the KTUY05 nuclear mass formula for applications off-stability. J. Nucl. Sci. Technol. 43, 1 (2006)
B. Baramsai et al., Radiative neutron Capture cross section from 236U. Phs. Rev. C 96, 024619 (2017)
C.-Y. Wu et al., A compact gas-filled avalanche counter for DANCE. Nucl. Instrum. Meth. A 78, 694 (2012)
S. Mosby et al., Unifying measurement of 239 Pu(n, γ) in the keV to MeV energy regime. Phys. Rev. C 97, 04160R (2018)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 This is a U.S. government work and not under copyright protection in the U.S.; foreign copyright protection may apply
About this paper
Cite this paper
Ullmann, J.L. et al. (2021). Neutron Capture on Actinides Studied with DANCE. In: Escher, J., et al. Compound-Nuclear Reactions . Springer Proceedings in Physics, vol 254. Springer, Cham. https://doi.org/10.1007/978-3-030-58082-7_20
Download citation
DOI: https://doi.org/10.1007/978-3-030-58082-7_20
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-58081-0
Online ISBN: 978-3-030-58082-7
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)