Proceedings ArticleDOI
Fission Cross Sections and Fission‐Fragment Mass Yields via the Surrogate Reaction Method
B. Jurado,Grégoire Kessedjian,M. Aiche,G. Barreau,Adrien Bidaud,S. Czajkowski,D. Dassié,B. Haas,L. Mathieu,B. Osmanov,L. Audouin,N. Capellan,L. Tassan-Got,J. N. Wilson,E. Berthoumieux,F. Gunsing,Ch. Theisen,Olivier Serot,E. Bauge,I. Ahmad,John P. Greene,R. V. F. Janssens +21 more
- Vol. 1005, Iss: 1, pp 90-95
TLDR
In this paper, a recent measurement to determine neutron-induced fission cross sections for the actinides 242,243Cm and 241Am is questioned by their results, since there are differences of more than 60% in the 0.7 to 7 MeV neutron energy range, and the experimental set-up has also enabled them to measure for the first time the fission fragment "pseudo-mass" distributions of 243,244,245cm and 242Am compound nuclei in the excitation energy range from a few MeV to about 25 MeV.Abstract:
The surrogate reaction method is a powerful tool to infer neutron‐induced data of short‐lived nuclei. After a short overview of the experimental techniques employed in the present surrogate experiments, we will concentrate on a recent measurement to determine neutron‐induced fission cross sections for the actinides 242,243Cm and 241Am. The latest direct neutron‐induced measurement for the 243Cm fission cross section is questioned by our results, since there are differences of more than 60% in the 0.7 to 7 MeV neutron energy range. Our experimental set‐up has also enabled us to measure for the first time the fission fragment “pseudo‐mass” distributions of 243,244,245Cm and 242Am compound nuclei in the excitation energy range from a few MeV to about 25 MeV.read more
Citations
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Journal ArticleDOI
Compound-nuclear reaction cross sections from surrogate measurements
TL;DR: A review of the current status of the surrogate approach can be found in this paper, where experimental techniques employed and theoretical descriptions of the reaction mechanisms involved are presented and representative cross section measurements are discussed.
Journal ArticleDOI
Cross sections for neutron capture from surrogate measurements: An examination of Weisskopf-Ewing and ratio approximations
Jutta Escher,F. S. Dietrich +1 more
TL;DR: In this article, a nuclear reaction model is employed to simulate physical quantities that are typically measured in surrogate experiments and used to assess the validity of the Weisskopf-Ewing and ratio approximations, which are typically employed in the analysis of surrogate reactions.
Journal ArticleDOI
Measurement of γ -emission Branching Ratios for 154,156,158 Gd Compound Nuclei: Tests of Surrogate Nuclear Reaction Approximations for ( n,γ ) Cross Sections
N. D. Scielzo,Jutta Escher,J. M. Allmond,M. S. Basunia,C. W. Beausang,L. A. Bernstein,D. L. Bleuel,Jason Burke,R. M. Clark,F. S. Dietrich,P. Fallon,J. Gibelin,Bethany L. Goldblum,S. R. Lesher,M. A. McMahan,Eric B. Norman,Eric B. Norman,Eric B. Norman,L. W. Phair,E. Rodriquez-Vieitez,E. Rodriquez-Vieitez,Steven Sheets,Ian J. Thompson,M. Wiedeking,M. Wiedeking +24 more
TL;DR: In this article, the reliability of cross-sections derived using the Weisskopf-Ewing and ratio approximations is explored for the $155,157,Gd$ reactions.
Journal ArticleDOI
Uncertainties in nuclear fission data
TL;DR: In this paper, the current status of knowledge of nuclear fission data is reviewed, and uncertainties related to each fission observable are quantified whenever possible, and the roles that theory and experiment play in reducing those uncertainties.
Journal ArticleDOI
Dynamical model of surrogate reactions
TL;DR: In this paper, a new dynamical model is developed to describe the whole process of surrogate reactions: Transfer of several nucleons at an initial stage, thermal equilibration of residues leading to washing out of shell effects, and decay of populated compound nuclei are treated in a unified framework.
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