Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

X-rays in a new light

15.03.2010
The SPring-8 synchrotron opens the door to study the nonlinear interaction of high-intensity x-rays with matter

Visible light and X-rays are different types of radiation. Visible light, for example, doesn’t penetrate the human body, whereas X-rays are absorbed weakly and can be used in medical imaging.

Similar differences exist at very high light intensities, which make X-rays potentially useful in materials science, but this area—referred to as ‘nonlinear optics’—remains largely unexplored. Now, researchers from the RIKEN SPring-8 Center in Harima have taken the first step in establishing a more systematic approach to studying nonlinear X-ray effects1.

The team investigated the so-called parametric down-conversion of a single X-ray photon that splits into two separate photons, whose combined energy equals the original photon’s energy. This effect was studied in a diamond crystal, which provided the medium for this process to occur. The necessary high intensity X-ray radiation came from the SPring-8 synchrotron, which is ideally suited for the task, according to Kenji Tamasaku from the research team. “It delivers some of the world’s brightest X-rays.”

However, a competing process can occur in addition to the down-conversion: the creation of only one X-ray photon and the simultaneous excitation of one of the material’s electron to another state from the remainder of the original energy. An observer cannot distinguish which of these processes actually occurred in the material to produce outcoming photons of the same energy, which means that there is a quantum mechanical interference between both processes. This is known as the Fano effect.

Tamasaku and colleagues studied the Fano effect for a range of parameters including X-ray photon energy. Based on theoretical modeling of a large dataset available from their experiments, they quantified efficiency of the nonlinear down-conversion process of X-rays for the first time. The possibility of this achievement had long been doubtful, as it requires not only a careful experimental calibration, but also very high X-ray intensities that are available at SPring-8.

The quantitative results for the nonlinear optical parameters of the down-conversion process are convincing and largely in line with theoretical expectations, even though some of the features observed remain poorly understood.

Nevertheless, Tamasaku is confident that “these results represent the first firm base from which to venture into the frontier of X-ray nonlinear optics.” In particular, he is hopeful that the completion of a new X-ray laser called X-ray Free Electron Laser (XFEL) at SPring-8 next year will significantly expand the potential for the study of these non-linear optical effects.

The corresponding author for this highlight is based at the Coherent X-Ray Optics Laboratory, RIKEN SPring-8 Center

Saeko Okada | Research asia research news
Further information:
http://www.rikenresearch.riken.jp/eng/research/6211
http://www.researchsea.com

More articles from Physics and Astronomy:

nachricht Light-emitting bubbles captured in the wild
28.02.2017 | Georg-August-Universität Göttingen

nachricht Scientists reach back in time to discover some of the most power-packed galaxies
28.02.2017 | Clemson University

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: Safe glide at total engine failure with ELA-inside

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded after a glide flight with an Airbus A320 in ditching on the Hudson River. All 155 people on board were saved.

On January 15, 2009, Chesley B. Sullenberger was celebrated world-wide: after the two engines had failed due to bird strike, he and his flight crew succeeded...

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

New technology offers fast peptide synthesis

28.02.2017 | Life Sciences

WSU research advances energy savings for oil, gas industries

28.02.2017 | Power and Electrical Engineering

Who can find the fish that makes the best sound?

28.02.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>