title: Effects of collision cascade density on radiation defect dynamics in 3C-SiC.
abstract: Effects of the collision cascade density on radiation damage in SiC remain poorly understood. Here, we study damage buildup and defect interaction dynamics in 3C-SiC bombarded at 100 °C with either continuous or pulsed beams of 500 keV Ne, Ar, Kr, or Xe ions. We find that bombardment with heavier ions, which create denser collision cascades, results in a decrease in the dynamic annealing efficiency and an increase in both the amorphization cross-section constant and the time constant of dynamic annealing. The cascade density behavior of these parameters is non-linear and appears to be uncorrelated. These results demonstrate clearly (and quantitatively) an important role of the collision cascade density in dynamic radiation defect processes in 3C-SiC.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: L B
authors.initials: LB
authors.lastname: Bayu Aji
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.|Department of Nuclear Engineering, Texas A&M University, College Station, Texas 77843, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Wallace
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: S O
authors.initials: SO
authors.lastname: Kucheyev