Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pinning Down a Proton

15.04.2010
Researchers Develop Method to Describe Binding of Protons and Neutrons

A researcher at North Carolina State University has helped to develop a new method for describing the binding of protons and neutrons within nuclei. This method may improve scientists’ ability to predict and understand astrophysical reactions within stars.

When protons and neutrons bind, the process releases energy. This fusion energy is how stars burn. If scientists can determine where these particles are, what they are doing, and how they are binding, they will then be able to more accurately predict and understand the life cycles of stars.

NC State physicist Dr. Dean Lee and German colleagues Evgeny Epelbaum, Hermann Krebs, and Ulf-G. Meissner, set out to see if there was a more straightfoward approach to describing particle interactions than currently used.

Their results were published in the April 9 issue of Physical Review Letters.

“These particles can literally be anywhere,” Lee says, “so pinning them down is hard. However, we do know that there are hierarchies of attractions between particles and we were able to use these hierarchies to give us a framework for describing how the protons and neutrons could bind with one another. That hierarchy is known as effective field theory.”

Lee and his colleagues used a numerical lattice which took into account all of the possible positions of the particles within the nucleus and the corresponding interaction energies. They ran a supercomputer simulation for the elements helium-4, lithium-6 and carbon-12, and demonstrated that the results of those simulations were accurate.

“Currently the indications are that our effective field theory calculations should let us describe nuclei with 16 or fewer protons and neutrons,” Lee says. “But our ability to describe larger nuclei using this approach also looks promising.”

The Department of Physics is part of NC State’s College of Physical and Mathematical Sciences.

Tracey Peake | EurekAlert!
Further information:
http://www.ncsu.edu

Further reports about: Pinning ProTon Supercomputer simulation carbon-12 helium-4 lithium-6 neutrons nuclei

More articles from Physics and Astronomy:

nachricht Observations of nearby supernova and associated jet cocoon provide new insights on gamma-ray bursts
18.01.2019 | George Washington University

nachricht A new twist on a mesmerizing story
17.01.2019 | ETH Zurich Department of Physics

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Ten-year anniversary of the Neumayer Station III

The scientific and political community alike stress the importance of German Antarctic research

Joint Press Release from the BMBF and AWI

The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...

Im Focus: Ultra ultrasound to transform new tech

World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles

The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

Im Focus: Nanocellulose for novel implants: Ears from the 3D-printer

Cellulose obtained from wood has amazing material properties. Empa researchers are now equipping the biodegradable material with additional functionalities to produce implants for cartilage diseases using 3D printing.

It all starts with an ear. Empa researcher Michael Hausmann removes the object shaped like a human ear from the 3D printer and explains:

Im Focus: Elucidating the Atomic Mechanism of Superlubricity

The phenomenon of so-called superlubricity is known, but so far the explanation at the atomic level has been missing: for example, how does extremely low friction occur in bearings? Researchers from the Fraunhofer Institutes IWM and IWS jointly deciphered a universal mechanism of superlubricity for certain diamond-like carbon layers in combination with organic lubricants. Based on this knowledge, it is now possible to formulate design rules for supra lubricating layer-lubricant combinations. The results are presented in an article in Nature Communications, volume 10.

One of the most important prerequisites for sustainable and environmentally friendly mobility is minimizing friction. Research and industry have been dedicated...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

Additive manufacturing reflects fundamental metallurgical principles to create materials

18.01.2019 | Materials Sciences

How molecules teeter in a laser field

18.01.2019 | Life Sciences

The cytoskeleton of neurons has been found to be involved in Alzheimer's disease

18.01.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>