Physics Commons^™

The Quantum Dancing Of Hot Atomic Nuclei: A New Theoretical Approach, Herlik Wibowo

Research and Creative Activities Poster Day

We study the nuclear excitation spectra in the two energy domains: the low energy region (below 10 MeV) and giant resonance (GR) region (10-30 MeV). In the low energy region, the experimentally discovered upbend of the radiative dipole strength function is very important as it has an impact on the rapid neutron capture cross sections, which are used, in particular, for the r-process nucleosynthesis studies.

Thermal continuum quasiparticle random-phase approximation (TCQRPA) is one of the models which attempts to explain this phenomenon. The deficiency of TCQRPA is the absence of quasiparticle vibration coupling (QVC) mechanism, which is already included in …

Time-Dependent Photoionization Of Gas Outflows In Agn, Ehab Elhoussieny, Manuel A. Bautista, J. Garcia, T. R. Kallman

Research and Creative Activities Poster Day

Gas outflows are fundamental components of Active Galactic Nuclei (AGN) activity. Time-variability of ionizing radiation, which is characteristic of AGN in various different time scales, may produce non-equilibrium photoionization conditions over a significant fraction of the flow and yields supersonically moving cooling/heating fronts. These fast fronts create pressure imbalances that can only be resolved by fragmentation of the flow and acceleration of such fragments. This mechanism can explain the kinematic structure of low ionization BAL systems (FeLoBAL). We will study these effects in detail by constructing time-dependent photoionization models of the outflows and incorporating these models into radiative-hydrodynamic simulations.

Microbeam Production Using Straight And Tapered Glass Capillaries, Asma M. Ayyad

Research and Creative Activities Poster Day

No abstract provided.

Study Of 14b Using (D,P) Reaction In Inverse Kinematics, Shadi Bedoor, Jonathan C. Lighthall, Scott T. Marley

Research and Creative Activities Poster Day

No abstract provided.

Time Dependent Photoionization Of Gas Outflows In Agn, Ehab Elhoussieny

Research and Creative Activities Poster Day

We study the dynamic effects of time varying UV ionizing continuum on radiation bounded photoionized outflows in AGN. We use a 1D hydrodynamics numerical code to verify the predictions of Bautista & Dunn (2010). It is seen that variations in the UV ionizing continuum yield nonequilibrium conditions in the plasma and create supersonic cooling and heating fronts that give the outflows. Thus, large pressure imbalances arise in the cloud, which are compensated by flow motions leading to fragmentation of the wind and dense shells at the leading ends of the outflowing clouds.