Featured Research

from universities, journals, and other organizations

Precise measurement of radiation damage on materials

Date:
June 5, 2012
Source:
DOE/Lawrence Livermore National Laboratory
Summary:
Researchers have for the first time simulated and quantified the early stages of radiation damage that will occur in a given material.

Model of the electronic wake (blue surfaces) generated by an energetic proton (red sphere) traveling in an aluminum crystal (yellow spheres). The resulting change in electronic density is responsible for modification of chemical bonds between the atoms and consequently for a change in their interactions.
Credit: Image courtesy of DOE/Lawrence Livermore National Laboratory

Lawrence Livermore National Laboratory researchers have for the first time simulated and quantified the early stages of radiation damage that will occur in a given material.

"A full understanding of the early stages of the radiation damage process provides knowledge and tools to manipulate them to our advantage," said Alfredo Correa, a Lawrence Fellow from Lawrence Livermore National Laboratory in the Quantum Simulations Group.

Nuclear radiation leads to highly energetic ions that can penetrate large distances within matter, often leading to the accumulation of damage sites as the ions pass through the material.

During this process, the energetic ions eventually slow down as energy is lost by friction with the materials' electrons. Like a speedboat moving through a calm body of water, the passage of fast ions creates a disturbance in the electron density in the shape of a wake.

Correa along with colleagues Alfredo Caro from Los Alamos National Laboratory, Jorge Kohanoff from the the UK and Emilio Artacho and Daniel Sαnchez-Portal from Spain, have directly simulated this quantum friction of the electrons in a real material for the very first time.

The team simulated the passage of a fast proton through crystalline aluminum. By accounting for the energy absorbed by the electrons and the magnitude of the impulse given to the aluminum atoms, the team was able to predict the rate at which the proton is stopped and the amount of momentum transferred. This is a precise atomistic simulation of the deposited energy and momentum, which is ultimately responsible for the damage that is produced in the material.

The new method opens up the possibility to predict the effect of radiation on a wide range of complex materials. The research not only applies to materials for nuclear applications, but also for materials related to the space industry, and new processing techniques for lasers and highly energetic ions. In biology and medicine, it also may contribute to understanding the effects of radiation on living tissues, both for damage and therapeutic processes.

In a broader sense, the new simulation capability represents the first step toward a unified method for the simultaneous simulation of electron and ion dynamics. The research is highlighted on the cover of the May 25 issue of Physical Review Letters.


Story Source:

The above story is based on materials provided by DOE/Lawrence Livermore National Laboratory. Note: Materials may be edited for content and length.


Journal Reference:

  1. Alfredo A. Correa, Jorge Kohanoff, Emilio Artacho, Daniel Sαnchez-Portal, and Alfredo Caro. Nonadiabatic Forces in Ion-Solid Interactions: The Initial Stages of Radiation Damage. Physical Review Letters, May 25, 2012 [link]

Cite This Page:

DOE/Lawrence Livermore National Laboratory. "Precise measurement of radiation damage on materials." ScienceDaily. ScienceDaily, 5 June 2012. <www.sciencedaily.com/releases/2012/06/120605143421.htm>.
DOE/Lawrence Livermore National Laboratory. (2012, June 5). Precise measurement of radiation damage on materials. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2012/06/120605143421.htm
DOE/Lawrence Livermore National Laboratory. "Precise measurement of radiation damage on materials." ScienceDaily. www.sciencedaily.com/releases/2012/06/120605143421.htm (accessed October 21, 2014).

Share This



More Matter & Energy News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) — If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) — Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) — British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Portable Breathalyzer Gets You Home Safely

Portable Breathalyzer Gets You Home Safely

Buzz60 (Oct. 21, 2014) — Breeze, a portable breathalyzer, gets you home safely by instantly showing your blood alcohol content, and with one tap, lets you call an Uber, a cab or a friend from your contact list to pick you up. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins