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- Brookhaven National LaboratoryUS92 papers
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7 papers · 1 filter
Path and Path Deviation Equations for p-branes
M. Pavšič, M. E. Kahil
Path and path deviation equations for neutral, charged, spinning and spinning charged test particles, using a modified Bazanski Lagrangian, are derived. We extend this approach to…
First Principles Calculation of Field Emission from Carbon Nanotubes With Nitrogen and Boron Doping
Sherif Tawfik, Salah Sheikh, Noha Salem
We investigate the field emission properties of nitrogenated and boronated carbon nanotubes using time-dependent density functional theory, were the wave function propagation is pe…
The Merger Environment of the WAT Hosting Cluster Abell 562
E. M. Douglass, Elizabeth L. Blanton, T. E. Clarke +2
We present a Chandra X-ray observation and VLA radio observations of the nearby (z=0.11) galaxy cluster Abell 562 and the wide angle tail (WAT) radio source 0647+693. The cluster d…
First Principles Calculation of Field Emission from Nanostructures using Time-Dependent Density Functional Theory: a Simplified Approach
Sherif Tawfik, Salah El Sheikh, Noha Salem
We introduce a new simplified method for computing the electron field emission current in short carbon nanotubes using ab-initio computation in periodic simulation cells. We comput…
Discovery of Quasi-Periodic Oscillations in the Recurrent Burst Emission from SGR 1806-20
Ahmed M. El-Mezeini, Alaa I. Ibrahim
We present evidence for Quasi-Periodic Oscillations (QPOs) in the recurrent outburst emission from the soft gamma repeater SGR 1806-20 using NASA's Rossi X-ray Timing Explorer (RXT…
SWIFT-BAT observations of the recently discovered magnetar SGR 0501+4516
Harsha S. Kumar, Alaa. I. Ibrahim, Samar Safi-Harb
We present results on the Soft Gamma Repeater (SGR) 0501+4516, discovered by the SWIFT Burst Alert Telescope (BAT) on 2008 August 22. More than 50 bursts were identified from this…