Neutron Capture on Actinides Studied
with DANCE
J. L. Ullmann, B. Baramsai, T. A. Bredeweg, A. J. Couture, R. C. Haight,
M. Jandel, T. Kawano, A. L. Keksis, S. Mosby, J. M. O’Donnell, C. Prokop,
R. S. Rundberg, G. Rusev, D. J. Vieira, C. Walker, J. B. Wilhelmy, C.-Y. Wu,
J. A. Becker, A. Chyzch, R. A. Henderson, G. E. Mitchell, and M. Krticka
1 Introduction
Neutron capture cross sections in the continuum region have been difficult to
calculate accurately [1], and measured cross sections are favored when accurate
results are needed. Calculations usually use the Hauser–Feshbach approach (Eq. 1),
where k n is the neutron wave number, g c is a statistical spin factor, T n is the neutron
transmission coefficient, T γ is the γ -ray transmission coefficient, and W nγ is the
width fluctuation factor. Good agreement with measurements is often obtained if
T γ is normalized to the measured s-wave resonance spacing D 0 and average s-wave
radiation width γ T γ = 2π γ /D 0 .
J. L. Ullmann () · B. Baramsai · T. A. Bredeweg · A. J. Couture · R. C. Haight · T. Kawano
A. L. Keksis · S. Mosby · J. M. O’Donnell · C. Prokop · R. S. Rundberg · G. Rusev · D. J. Vieira
C. Walker · J. B. Wilhelmy
Los Alamos National Laboratory, Los Alamos, NM, USA
e-mail: ullmann@lanl.gov
M. Jandel
Los Alamos National Laboratory, Los Alamos, NM, USA
University of Massachusetts, Lowell, MA, USA
C.-Y. Wu · J. A. Becker · A. Chyzch · R. A. Henderson
Lawrence Livermore National Laboratory, Livermore, CA, USA
G. E. Mitchell
North Carolina State University, Raleigh, NC, USA
M. Krticka
Charles University, Prague, Czech Republic
© This is a U.S. government work and not under copyright protection
in the U.S.; foreign copyright protection may apply 2021
J. Escher et al. (eds.), Compound-Nuclear Reactions, Springer Proceedings in
Physics 254, https://doi.org/10.1007/978-3-030-58082-7_20
173
with DANCE
J. L. Ullmann, B. Baramsai, T. A. Bredeweg, A. J. Couture, R. C. Haight,
M. Jandel, T. Kawano, A. L. Keksis, S. Mosby, J. M. O’Donnell, C. Prokop,
R. S. Rundberg, G. Rusev, D. J. Vieira, C. Walker, J. B. Wilhelmy, C.-Y. Wu,
J. A. Becker, A. Chyzch, R. A. Henderson, G. E. Mitchell, and M. Krticka
1 Introduction
Neutron capture cross sections in the continuum region have been difficult to
calculate accurately [1], and measured cross sections are favored when accurate
results are needed. Calculations usually use the Hauser–Feshbach approach (Eq. 1),
where k n is the neutron wave number, g c is a statistical spin factor, T n is the neutron
transmission coefficient, T γ is the γ -ray transmission coefficient, and W nγ is the
width fluctuation factor. Good agreement with measurements is often obtained if
T γ is normalized to the measured s-wave resonance spacing D 0 and average s-wave
radiation width γ T γ = 2π γ /D 0 .
J. L. Ullmann () · B. Baramsai · T. A. Bredeweg · A. J. Couture · R. C. Haight · T. Kawano
A. L. Keksis · S. Mosby · J. M. O’Donnell · C. Prokop · R. S. Rundberg · G. Rusev · D. J. Vieira
C. Walker · J. B. Wilhelmy
Los Alamos National Laboratory, Los Alamos, NM, USA
e-mail: ullmann@lanl.gov
M. Jandel
Los Alamos National Laboratory, Los Alamos, NM, USA
University of Massachusetts, Lowell, MA, USA
C.-Y. Wu · J. A. Becker · A. Chyzch · R. A. Henderson
Lawrence Livermore National Laboratory, Livermore, CA, USA
G. E. Mitchell
North Carolina State University, Raleigh, NC, USA
M. Krticka
Charles University, Prague, Czech Republic
© This is a U.S. government work and not under copyright protection
in the U.S.; foreign copyright protection may apply 2021
J. Escher et al. (eds.), Compound-Nuclear Reactions, Springer Proceedings in
Physics 254, https://doi.org/10.1007/978-3-030-58082-7_20
173