Ray Alert says: “Radiation need not be feared, but it MUST command yoru respect.”

Health Physics. For your protection.

Oak Ridge National Laboratory.

Oak Ridge Associated Universities Poster Collection. Originally published 1947 for Oak Ridge Laboratory.

This video is ridiculously amazing. The scientists at the Department of Energy used the TITAN Supercomputer, one of the most powerful computers in the world, to simulate ground motion during the earthquake the last time the southern stretch of the San Andreas ruptured in 1857. There’s a real neat effect where they show the seismogram generated at some of the major cities throughout California as the simulation goes.

CSWP Women Physicist of the Month - June 2016

Caroline Nesaraja, Oak Ridge National Laboratory

Dr. Caroline Nesaraja is a nuclear physicist in the Physics Division at Oak Ridge National Laboratory (ORNL). Prior to ORNL, Caroline was awarded the German Academic Exchange Service Scholarship (DAAD) to pursue her PhD thesis research at Forschungszentrum Jülich, a premier nuclear physics laboratory in Germany. From there she joined the Triangle Universities Nuclear Laboratory at Duke University, and worked as an Assistant Professor at Tennessee Technological University before taking on her current role in the Nuclear Data Program at ORNL.

Dr. Nesaraja’s area of expertise is the critical analysis and evaluation of nuclear data on the structure and decay properties of nuclei. Her detailed determinations of “best value” nuclear structure data sets from all published experimental results are included in the ENSDF (Evaluated Nuclear Structure and Decay Data File) online database. Used by scientist all around the world, ENSDF is the predominant reference source of nuclear data and information for basic research and applied science areas such as nuclear energy, medical physics, and international security.

Dr. Nesaraja is also an important member of the US Nuclear Data Program (USNDP) that coordinates the activities of data programs around the country and internationally in cooperation with the International Atomic Energy Agency (IAEA) in Vienna. She regularly serves as a nuclear data evaluator for the International Network of Nuclear Structure and Decay Data Evaluators (NSDD) at the IAEA.

Dr. Nesaraja has a unique set of capabilities that make her a valuable addition to the national US and international nuclear data evaluation community. Her background in experimental nuclear physics enables her to recognize sources of error and inconsistency in published works. She also serves as the Educational Coordinator for the ORNL Physics Division, facilitating internships that help train the next generation of scientists.

Past CSWP Women Physicists of the Month

The High Flux Isotope Reactor, located at Oak Ridge National Laboratory in Tennessee, operates at 85 megawatts and is one of the United States’ highest flux reactor-based sources of neutrons for condensed matter research, and provides the highest steady-state neutron fluxes of any research reactor in the world.

Neutron scattering research facilities at the High Flux Isotope Reactor contain a world-class collection of instruments used for fundamental and applied research on the structure and dynamics of matter. The reactor is also used for a number of different reasons: medical/industrial/research isotope production, research on severe neutron damage to materials, and neutron activation.


Core Collapse Supernova Simulations
Computational Astrophysics  |   CSMD  |  Oak Ridge National Laboratory

 A revised picture of core collapse supernova explosions is emerging from our ongoing simulations. We have discovered that the core collapse supernova shock wave is likely reenergized to initiate an explosion at much later times than previously anticipated. The shock wave must exit the iron core and enter the oxygen layer before shock revival can occur.

In these images, the development of the supernova shock wave instability, a key component of the core collapse supernova explosion mechanism, is shown.

Nonspherical distortions of the shock (the surface in the image) grow, leading to grossly aspherical explosions.

The entropy of the stellar core fluid below the shock wave is shown here, which also illustrates the turbulent nature of the flow in an exploding stellar core.   (X)

Researchers finally produce graphene on a large-scale… “2-inch-by-2-inch sheets"

One of the barriers to using graphene at a commercial scale could be overcome using a method demonstrated by researchers at the Department of Energy’s Oak Ridge National Laboratory.

Graphene, a material stronger and stiffer than carbon fiber, has enormous commercial potential but has been impractical to employ on a large scale, with researchers limited to using small flakes of the material.

Now, using chemical vapor deposition, a team led by ORNL’s Ivan Vlassiouk has fabricated polymer composites containing 2-inch-by-2-inch sheets of the one-atom thick hexagonally arranged carbon atoms.


Ref: Strong and Electrically Conductive Graphene-Based Composite Fibers and Laminates. ACS Appl. Mater. Interfaces (2015) | DOI: 10.1021/acsami.5b01367

trying to make my research look good

Alright, I’m on the home stretch.

Just one more day of work till I give my research powerpoint presentation…and then I’m free!

Ah, but what a long day it’s going to be.

Basically, I’m going to spend all of tomorrow putting together my presentation and trying to make my research sound impressive (which is a lot harder than it sounds).

I spent most of today with some of the staff trying to set up an overnight experiment on the confocal microscope-incubator. We finally got it working, but it wasn’t exactly under the optimal conditions I would have liked.

Hopefully though, everything will go fine and I’ll have some interesting/cool images tomorrow morning.

Lord knows my presentation could use a few of those. XD

A fast-growing city

We’ve done it once again, Knoxville. Made a national top-10 list, that is.

According to CNN Money, Knoxville ranks No. 8 on the 10 fastest growing cities list.

Some of the reasons cited include the city’s employment outlook, which is apparently “the best … in the nation” currently; Oak Ridge National Lab and the research it conducts; nearby transportation facilities; low cost of living; and low crime rate.

All in all, it paints a pretty nice picture of our ol’ city. And I think we’ll take it.