R
R. A. Ward
Researcher at Lawrence Livermore National Laboratory
Publications - 29
Citations - 945
R. A. Ward is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Nucleosynthesis & Neutron. The author has an hindex of 15, co-authored 29 publications receiving 914 citations. Previous affiliations of R. A. Ward include Los Alamos National Laboratory & University of California.
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Journal ArticleDOI
Opacity measurements in a hot dense medium
T.S. Perry,T.S. Perry,T.S. Perry,S.J. Davidson,S.J. Davidson,S.J. Davidson,F.J.D. Serduke,F.J.D. Serduke,F.J.D. Serduke,D.R. Bach,D.R. Bach,D.R. Bach,C. C. Smith,C. C. Smith,C. C. Smith,J.M. Foster,J.M. Foster,J.M. Foster,R.J. Doyas,R.J. Doyas,R.J. Doyas,R. A. Ward,R. A. Ward,R. A. Ward,C.A. Iglesias,C.A. Iglesias,C.A. Iglesias,F.J. Rogers,F.J. Rogers,F.J. Rogers,J. Abdallah,J. Abdallah,J. Abdallah,R.E. Stewart,R.E. Stewart,R.E. Stewart,J.D. Kilkenny,J.D. Kilkenny,J.D. Kilkenny,Richard W. Lee,Richard W. Lee,Richard W. Lee +41 more
TL;DR: In this article, measurements of the absorption of X-rays by 1 to 2 transitions in Al XII through Al VIII have been made in a laser-heated slab plasma at the measured temperature and density of 58 ^ 4e V and 0.020 g cm~3.
Journal ArticleDOI
s-Process Studies In the Light of New Experimental Cross Sections: Distribution of Neutron Fluences and r-Process Residuals
TL;DR: In this article, a best set of neutron-capture cross sections has been evaluated for the most important s-process isotopes and good agreement is found between the difference of solar and sprocess abundances and the abundances of pure r-process nuclei.
Journal ArticleDOI
Thermalization of long-lived nuclear isomeric states under stellar conditions
R. A. Ward,W. A. Fowler +1 more
Journal ArticleDOI
Absorption experiments on x-ray-heated mid-Z constrained samples.
Ted Perry,P. T. Springer,D. F. Fields,D. R. Bach,F. J. D. Serduke,Carlos A. Iglesias,Forrest J. Rogers,J. K. Nash,M. H. Chen,Brian G. Wilson,William H. Goldstein,B. Rozsynai,R. A. Ward,J. D. Kilkenny,R. Doyas,L. B. Da Silva,Christina Back,R. C. Cauble,S. J. Davidson,John Foster,C.C. Smith,A. Bar-Shalom,Richard W. Lee +22 more
TL;DR: Results of a niobium absorption experiment are presented that represent a major step in the development of techniques necessary for the quantitative characterization of hot, dense matter.
Journal ArticleDOI
Quantitative measurement of mid-z opacities
Ted Perry,Kimberly S. Budil,R. Cauble,R. A. Ward,D. R. Bach,Carlos A. Iglesias,Brian G. Wilson,J.K. Nash,C.C. Smith,John Foster,S.J. Davidson,F. J. D. Serduke,J. D. Kilkenny,Richard W. Lee +13 more
TL;DR: In this paper, a general discussion of the experimental technique is given showing the requirements that must be met in order to extract quantitative transmission data and the resulting spectrally resolved absorption measurements can then be used to test the capabilities of LTE opacity codes.