Robert Casperson
Lawrence Livermore National Laboratory
60 Papers
230 Citations
Robert Casperson is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Neutron & Fission. The author has an hindex of 11, co-authored 60 publications.
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Papers
Applying a Template of Expected Uncertainties to Updating 239Pu(n,f) Cross-section Covariances in the Neutron Data Standards Database
Denise Neudecker,D.L. Smith,Fredrik Tovesson,Roberto Capote,Morgan C. White,Nathaniel Bowden,L. Snyder,Allan D. Carlson,Robert Casperson,V.G. Pronyaev,Samuele Sangiorgio,Kyle Schmitt,B. Seilhan,N. Walsh,Walid Younes +14 more
TL;DR: In this paper, the authors extend a template that is applicable to uncertainties expected in neutron-induced fission, (n,f), cross-section measurements to estimate covariances for experimental data employed in their evaluations, which can be used by evaluators in situations where they are not supplied by the experimenters.
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Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements
V. Werner,N. Benczer-Koller,G. J. Kumbartzki,Jason D. Holt,P. Boutachkov,E. A. Stefanova,M. Perry,Norbert Pietralla,H. Ai,K. Aleksandrova,G. Anderson,R. B. Cakirli,Robert Casperson,R. F. Casten,M. Chamberlain,Calina Copos,B. Darakchieva,Stephen Eckel,M. Evtimova,Conor Fitzpatrick,A. B. Garnsworthy,G. Gürdal,Andreas Martin Heinz,D. A. Kovacheva,Chris Lambie-Hanson,X. Liang,P. Manchev,E. A. McCutchan,D. A. Meyer,J. Qian,Axel Schmidt,N. J. Thompson,Elizabeth Williams,Ryan Winkler +33 more
TL;DR: Using the transient field technique, the magnetic moments of the second excited second excited (2}+}$ states in $^{92,94}-mathrm{Zr}$ have been measured for the first time as discussed by the authors, and the large positive $g$ factors are found to be a consequence of weak proton-neutron coupling combined with the $Z=40$ subshell closure.
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Utilizing ( p , d ) and ( p , t ) reactions to obtain ( n , f ) cross sections in uranium nuclei via the surrogate-ratio method
Richard Hughes,C. W. Beausang,T.J. Ross,Jason Burke,N. D. Scielzo,M. S. Basunia,C. M. Campbell,Robert Casperson,H. L. Crawford,Jutta Escher,J. Munson,L. W. Phair,J. J. Ressler +12 more
TL;DR: This paper presents a meta-modelling system that automates the very labor-intensive and therefore time-heavy and therefore expensive and expensive process of manually cataloging and cataloging the individual particles that make up a graph.
Measurement of the Am 240 ( n , f ) cross section using the surrogate-ratio method
Robert Casperson,Jason Burke,Nicholas Scielzo,Jutta Escher,E. McCleskey,M. McCleskey,Antti Saastamoinen,A. Spiridon,Andrew Ratkiewicz,A. Blanc,Meiko Kurokawa,R. G. Pizzone +11 more
TL;DR: In this paper, the authors used the surrogate-ratio method over the neutron energy range of 200 keV to 14 MeV to obtain the first time above 4 MeV.
Fission fragment angular anisotropy in neutron-induced fission of 235 U measured with a time projection chamber
V. Geppert-Kleinrath,Fredrik Tovesson,J. S. Barrett,Nathaniel Bowden,J. Bundgaard,Robert Casperson,D. Cebra,T. Classen,M. Cunningham,D. L. Duke,J. Gearhart,Uwe Greife,E. Guardincerri,C. A. Hagmann,M. Heffner,D. Hensle,D. Higgins,L. D. Isenhower,Jonathan B. King,J. L. Klay,W. Loveland,J. A. Magee,Brett Manning,M. P. Mendenhall,J. Ruz,Samuele Sangiorgio,Kyle Schmitt,B. Seilhan,L. Snyder,A. C. Tate,R. S. Towell,N. Walsh,S. Watson,L. Yao,Walid Younes,H. Leeb +35 more
TL;DR: In this paper, a three-dimensional tracking detector is employed to study fragment emission angles and provide a direct measurement of angular anisotropy, which can provide an important constraint on fission theory, improving predictive fission codes and are a prerequisite for a precise ratio cross section measurement.
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