Maureen B. Steiner

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Paleomagnetic poles and magnetostratigraphy were obtained from the late Carnian and early Norian Petrified Forest Formation, The remanent magnetization characteristics of this variegated claystones formation are correlated closely with stratal color; red strata display uni-vectorial magnetizations directed to the origin of orthogonal axes plots between 300'(More)
Carbon electronics based on carbon nanotube array field-effect transistors (AFETs) and 2-D graphene field-effect transistors (GFETs) have recently attracted significant attention for potential RF applications. Here, we explore the ultimate RF performance potential for these two unique devices using semiclassical ballistic transport simulations. It is shown(More)
Resonance Raman scattering is used to determine the radial breathing mode ͑RBM͒ frequency ͑␻ RBM ͒ dependence on tube diameter ͑d t ͒ for single-wall carbon nanotubes ͑SWNTs͒. We establish experimentally the ␻ RBM = 227.0/ d t as the fundamental relation for pristine SWNTs. All the other RBM values found in the literature can be explained by an upshift in(More)
Quasi–one–dimensional spin–Peierls and spin–ladder systems are characterized by a gap in the spin–excitation spectrum, which can be modeled at low energies by that of Dirac fermions with a mass. In the presence of disorder these systems can still be described by a Dirac fermion model, but with a random mass. Some peculiar properties, like the Dyson(More)
Partial cross sections and corresponding momentum distributions have been studied in the one-neutron knockout reaction (12 Be, 11 Be 1 g) on a 9 Be target at 78 MeV͞nucleon. The resulting spectroscopic factors for the only two bound states of 11 Be are 0.42 6 0.06 (1͞2 1) and 0.37 6 0.06 (1͞2 2), where the errors are experimental only. This result shows(More)
In an effort to understand the implications of Coulomb dissociation experiments for the determination of the 7 Be(p,γ) 8 B reaction rate, longitudinal momentum distributions of 7 Be fragments produced in the Coulomb dissoci-ation of 44 and 81 MeV/nucleon 8 B beams on a Pb target were measured. These distributions are characterized by asymmetries interpreted(More)
Measurements of deexcitation g rays in coincidence with the momentum distribution of the projectile residues produced in reactions of the type 9 Be͑ 28 P, 27 Si 1 g͒X at energies around 65 MeV͞u are used to study single-nucleon stripping to individual states. The cross sections are compared with calculations based on an eikonal model description of the(More)
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