- About Us
- Career Center
- Nano-Social Network
- Nano Consulting
- My Account
|As indicated in the graphic, the gas giant planets of our solar system – Jupiter, Saturn, Uranus and Neptune – are mostly composed of hydrogen. Image courtesy of NASA|
Hydrogen is the most abundant element in the universe and is a major component of giant planets such as Jupiter and Saturn. But not much is known about what happens to this abundant element under high-pressure conditions when it transforms from one state to another.
Using quantum simulations, scientists at the Lawrence Livermore National Laboratory, the University of Illinois at Urbana-Champaign and the University of L'Aquia in Italy were able to uncover these phase transitions in the laboratory similar to how they would occur in the centers of giant planets.
They discovered a first order phase transition, a discontinuity, in liquid hydrogen between a molecular state with low conductivity and a highly conductive atomic state. The critical point of the transition occurs at high temperatures, near 3100 degrees Fahrenheit and more than 1 million atmospheres of pressure.
"This research sheds light on the properties of this ubiquitous element and may aid in efforts to understand the formation of planets," said LLNL's Eric Schwegler.
The team used a variety of sophisticated quantum simulation approaches to examine the onset of molecular diassociation in hydrogen under high-pressure conditions. The simulations indicated there is a range of densities where the electrical conductivity of the fluid increases in a discontinuous fashion for temperatures below 3100 degrees Fahrenheit.
There is a liquid-liquid-solid multiphase coexistence point in the hydrogen phase diagram that corresponds to the intersection of the liquid-liquid phase transition, according to Miguel Morales from the University of Illinois and lead author of a paper appearing online in the Proceedings of the National Academy of Sciences for the week of June 21-25.
Other collaborators include Prof. David Ceperley from the University of Illinois at Urbana-Champaign, and Prof. Carlo Pierleoni from the University of L'Aquila. The work was funded in part by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program.
About Lawrence Livermore National Laboratory
Founded in 1952, Lawrence Livermore National Laboratory is a national security laboratory, with a mission to ensure national security and apply science and technology to the important issues of our time. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.
For more information, please click here
Anne M. Stark
Copyright © Lawrence Livermore National LaboratoryIf you have a comment, please Contact us.
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
|Related News Press|
News and information
Animal study shows flexible, dissolvable silicon device promising for brain monitoring: Other applications include post-operative observation for vascular, cardiac, and orthopaedic procedures, finds Penn study May 5th, 2016
Superfast light source made from artificial atom April 28th, 2016
Physicists detect the enigmatic spin momentum of light April 26th, 2016
The intermediates in a chemical reaction photographed 'red-handed' Researchers at the UPV/EHU-University of the Basque Country have for the first time succeeded in imaging all the steps in a complex organic reaction and have resolved the mechanisms that explain it May 4th, 2016
Cooling graphene-based film close to pilot-scale production April 30th, 2016
A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016
The atom without properties April 22nd, 2016