@article{beun_mclaughlin_surman_hix_2008, title={Fission cycling in a supernova r process}, volume={77}, ISSN={["1089-490X"]}, DOI={10.1103/physrevc.77.035804}, abstractNote={Recent halo star abundance observations exhibit an important feature of consequence to the r process: the presence of a main r process between the second and third peaks that is consistent among halo stars. We explore fission cycling and steady {beta} flow as the driving mechanisms behind this feature. The presence of fission cycling during the r process can account for nucleosynthesis yields between the second and third peaks, whereas the presence of steady {beta} flow can account for consistent r-process patterns, robust under small variations in astrophysical conditions. We employ the neutrino-driven wind of the core-collapse supernova to examine fission cycling and steady {beta} flow in the r process. As the traditional neutrino-driven wind model does not produce the required very neutron-rich conditions for these mechanisms, we examine changes to the neutrino physics necessary for fission cycling to occur in the neutrino-driven wind environment, and we explore under what conditions steady {beta} flow is obtained.}, number={3}, journal={PHYSICAL REVIEW C}, author={Beun, J. and McLaughlin, G. C. and Surman, R. and Hix, W. R.}, year={2008}, month={Mar} }
 @article{beun_blackmon_hix_mclaughlin_smith_surman_2009, title={Neutron capture on Sn-130 during r-process freeze-out}, volume={36}, ISSN={["1361-6471"]}, DOI={10.1088/0954-3899/36/2/025201}, abstractNote={We examine the role of neutron capture on 130Sn during r-process freeze-out in the neutrino-driven wind environment of the core-collapse supernova. We find that the global r-process abundance pattern is sensitive to the magnitude of the neutron capture cross section of 130Sn. The changes to the abundance pattern include not only a relative decrease in the abundance of 130Sn and an increase in the abundance of 131Sn, but also a shift in the distribution of material in the rare earth and third peak regions.}, number={2}, journal={JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS}, author={Beun, J. and Blackmon, J. C. and Hix, W. R. and McLaughlin, G. C. and Smith, M. S. and Surman, R.}, year={2009}, month={Feb} }