Navigation Links
Delayed time zero in photoemission
Date:6/24/2010

light one of the electrons leaves the atom earlier than the other. Hence we were able to show that electrons "hesitate" briefly before they leave an atom," explains Reinhard Kienberger, Professor for Experimental Physics (E 11) at the TUM and head of the Junior Research Group Attosecond Dynamics at the MPQ.

Determining the cause of this hesitation was also a challenge to the LAP theorists around Dr. Vladislav Yakovlev and his colleagues from the Vienna University of Technology (Austria) and the National Hellenic Research Foundation (Greece). Although they could confirm the effect qualitatively using complicated computations, they came up with a time offset of only five attoseconds. The cause of this discrepancy may lie in the complexity of the neon atom, which consists, in addition to the nucleus, of ten electrons. "The computational effort required to model such a many-electron system exceeds the computational capacity of today's supercomputers," explains Yakovlev.

Nevertheless, these investigations already point toward a probable cause of the "hesitation" of the electrons: the electrons interact not only with their atomic nucleus, but they are also influenced by one another. "This electron-electron interaction may then mean that it takes a short while before an electron that is shaken by the incident light wave is released by its fellow electrons and allowed to leave the atom," sais Dr. Martin Schulze, Postdoc at the LAP-Team.

"These to-date poorly understood interactions have a fundamental influence on electron movements in tiniest dimensions, which determine the course of all biological and chemical processes, not to mention the speed of microprocessors, which lie at the heart of computers", explains Ferenc Krausz. "Our investigations shed light on the electrons' interactions with one another on atomic scale". To this end, the fastest measuring technique in the world is just about good enough: the observed 20-attosecond time offset in
'/>"/>

Contact: Dr. Andreas Battenberg
battenberg@zv.tum.de
49-892-891-0510
Technische Universitaet Muenchen
Source:Eurekalert  

0

GOOD

Page: 1 2 3

Related biology technology :

1. Barr Confirms Patent Challenge of Prevacid(R) SoluTab(TM) Delayed-Release Orally Disintegrating Tablets, 15mg and 30mg
2. Sangui Bio Tech International Inc. Shareholders Meeting Delayed to Include FY 2008 Report
3. FDA Approves KAPIDEX(TM) (Dexlansoprazole) delayed release capsules for the Treatment of GERD
4. NAVIGATOR Shows Valsartan Delayed Progression to Type 2 Diabetes in At-Risk Cardiovascular Patients With Impaired Glucose Tolerance
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Delayed time zero in photoemission
(Date:5/21/2013)... Miami, FL (PRWEB) May 21, 2013 ... and breakouts as contributor to acne. Recently physicians from ... effects of mental stress on the skin, and suggested ... to help reduce the chemicals produced from stress that ... aside from the negative feelings acne brings about, stress ...
(Date:5/21/2013)... BALTIMORE , May 21, 2013  Personal ... will use its proprietary methodologies and expertise in ... novel kinase targets in collaboration with Blueprint Medicines. ... aimed at identifying genomic alterations in tumors, and ... selective kinase inhibitors for a genetically defined patient ...
(Date:5/21/2013)... (PRWEB) May 21, 2013 Inflamax ... of the ITN to design the study, which ... two key clinical models used in the study ... and Nasal Allergen Challenge (NAC) models. Although both ... numerous publications, to date no direct comparison between ...
(Date:5/21/2013)... May 21, 2013 PathoGenetix, Inc., a ... strain typing, announced today that it has successfully identified ... coli strains obtained from the Centers for Disease Control ... (GSS™) technology. The findings are detailed in a ... American Society for Microbiology in Denver on Monday. , ...
Breaking Biology Technology:Adult Acne Treatment, Probiotic Action Explains How Hypnotherapy and Probiotics May Cure Various Skin Conditions 2Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 2Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 3Inflamax Research selected by the Immune Tolerance Network and the National Institutes of Health to conduct a landmark clinical study on the underlying mechanisms of allergic inflammation. 2New Genotyping System Identifies Pathogenic E. coli Outbreak Strains 2New Genotyping System Identifies Pathogenic E. coli Outbreak Strains 3
... Wis. - Hartford-based api Software, Inc . has ... to four hospitals and health systems, for whom it may ... designed the bundled system so that parts of the bundle ... objective in an era of severe nursing shortages. , ...
... Supreme Court in eBay Inc. v. Mercexchange LLC, held ... be granted an injunction must be determined under the ... (2) inadequacy of remedies at law; (3) balancing of ... the Federal Circuit's approach that an injunction should be ...
... Madison, Wis. - Gov. Jim Doyle has signed ... eliminate some of the bureaucratic obstacles that stand in ... said the law would help researchers more quickly turn ... law requires a lengthy, bureaucratic review whenever UW faculty ...
Cached Biology Technology:Medical software may be a retention tool 2Supreme Court decision in eBay case could affect value of patents 2
(Date:5/22/2013)... May 22, 2013. Plastic additives known as phthalates ... everywhere: They turn up in flooring, plastic cups, ... the Centers for Disease Control and Preventionthe bodies ... have come under increasing scrutiny. A growing collection ... can leech from packaging and mix with food) ...
(Date:5/21/2013)... analysis shows that the nation,s land and water resources ... produce up to 25 billion gallons of algae-based fuel ... country,s yearly needs. , The findings come from an ... needed to grow significant amounts of algae in large, ... the May 7 issue of Environmental Science and ...
(Date:5/21/2013)... of all types become most deadly when they metastasize ... reached this stage, it becomes very difficult for doctors ... develop. Now, researchers at the University of Missouri have ... lymphoma tumor cells wherever they may be in the ... the MU College of Veterinary Medicine, says being able ...
Breaking Biology News(10 mins):Study links chemicals widely found in plastics and processed food to elevated blood pressure in children and teens 2Going green: Nation equipped to grow serious amounts of pond scum for fuel 2Going green: Nation equipped to grow serious amounts of pond scum for fuel 3Going green: Nation equipped to grow serious amounts of pond scum for fuel 4MU researchers develop radioactive nanoparticles that target cancer cells 2
... Internationally respected scientists will gather next week for a ... a mind and to emphasize the need for $4 billion ... years. Presented by Great Ape Trust of Iowa, Decade ... recognized research pioneers from a variety of disciplines May 7-9 ...
... of a good thing could be harmful to the ... to kill harmful bacteria and, recently, have used this ... a University of Missouri researcher has found that silver ... to remove ammonia from wastewater treatment systems. The study ...
... YORK (APRIL 29, 2008) Bison can repopulate large ... years provided a series of conservation and restoration measures ... species by the Wildlife Conservation Society and other groups. ... of conservationists, scientists, ranchers, and Native Americans/First Nations peoples, ...
Cached Biology News:Decade of the Mind symposium in Iowa to emphasize need for $4 billion in federal support 2Decade of the Mind symposium in Iowa to emphasize need for $4 billion in federal support 3Decade of the Mind symposium in Iowa to emphasize need for $4 billion in federal support 4Too much technology may be killing beneficial bacteria 2Bison can thrive again, study says 2
Human GATA-2 Affinity Purified Polyclonal Ab...
...
... priced, full ring small animal imaging PET ... microPET R4 low retail price, it outperfoms ... count rate performance, energy resolution, timing resolution, ... small animal PET (Positron Emission Tomography) imaging ...
... versatile liquid handling platforms and flexible robotic ... of life science applications.The Freedom EVO platform ... 100, 150 and 200 cm), giving all ... will advance with their application needs. ...
Biology Products: