Publications (8)
Determining the Anisotropic Exchange Coupling of CrO_2 via First-Principles Density Functional Theory Calculations
H. Sims, S. J. Oset, W. H. Butler +2
We report a study of the anisotropic exchange interactions in bulk CrO_2 calculated from first principles within density functional theory. We determine the exchange coupling energ…
Revalidation of the isobaric multiplet mass equation for the quintet
B. E. Glassman, D. Pérez-Loureiro, C. Wrede +18
An unexpected breakdown of the isobaric multiplet mass equation in the , quintet was recently reported, presenting a challenge to modern theories of nuclear structure.…
New -ray Transitions Observed in Ne with Implications for the O(,)Ne Reaction Rate
M. R. Hall, D. W. Bardayan, T. Baugher +34
The O(,)Ne reaction is responsible for breakout from the hot CNO cycle in Type I x-ray bursts. Understanding the properties of resonances between an…
Effects of 3-d and 4-d-transition metal substitutional impurities on the electronic properties of CrO2
M. E. Williams, H. Sims, D. Mazumdar +1
We present first-principles based density functional theory calculations of the electronic and magnetic structure of CrO2 with 3d (Ti through Cu) and 4d (Zr through Ag) substitutio…
Superallowed decay of Mg: value and branching
B. E. Glassman, D. Pérez-Loureiro, C. Wrede +18
\textbf{Background}: Superallowed decays of isospin nuclides can be used to test theoretical isospin symmetry breaking corrections applied to extra…
Effect of Local Electron-Electron Correlation in Hydrogen-like Impurities in Ge
H. Sims, E. R. Ylvisaker, E. ÅaÅıoÄlu +3
We have studied the electronic and local magnetic structure of the hydrogen interstitial impurity at the tetrahedral site in diamond-structure Ge, using an empirical tight binding…
Theoretical investigation into the possibility of very large moments in Fe16N2
H. Sims, W. H. Butler, M. Richter +4
We examine the mystery of the disputed high-magnetization α"-Fe16N2 phase, employing the Heyd-Scuseria-Ernzerhof screened hybrid functional method, perturbative many-body correcti…
Key Ne states identified affecting -ray emission from F in novae
M. R. Hall, D. W. Barbadian, T. Baugher +34
Detection of nuclear-decay rays provides a sensitive thermometer of nova nucleosynthesis. The most intense -ray flux is thought to be annihilation radiation from the $β^+…