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

This release is available in German.

When light is absorbed by atoms, the electrons become excited. If the light particles, so-called photons, carry sufficient energy, the electrons can be ejected from the atom. This effect is known as photoemission and was explained by Einstein more than hundred years ago. Until now, it has been assumed that the electron start moving out of the atom immediately after the impact of the photon. This point in time can be detected and has so far been considered as coincident with the arrival time of the light pulse, i.e. with "time zero" in the interaction of light with matter.

Using their ultra-short time measurement technology, physicists from the Laboratory for Attosecond Physics at the Max Planck Institute of Quantum Optics (MPQ), the Technische Universitaet Muenchen (TUM) and the Ludwig-Maximilians-Universitaet Munich (LMU) along with collaborators from Austria, Greece, and Saudi Arabia, have now tested this assumption.

The physicists fired pulses of near-infrared laser light lasting less than four femtoseconds (10-15 seconds) at atoms of the noble gas neon. The atoms were simultaneously hit by extreme ultraviolet pulses with a duration of 180 attoseconds, liberating electrons from their atomic orbitals. The attosecond flashes ejected electrons either from the outer 2p-orbitals or from the inner 2s-orbitals of the atom. With the controlled field of the synchronised laser pulse serving as an "attosecond chronograph", the physicists then recorded when the excited electrons left the atom.

Their measurements revealed that electrons from different atomic orbitals, although excited simultaneously, leave the atom with a small but measurable time delay of about twenty attoseconds. "One attosecond is one billionth of one billionth of a second, an unimaginable short interval of time. But after excitation by
'/>"/>

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

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:9/19/2014)... September 19, 2014 ... http://www.researchandmarkets.com/research/b2jxhs/micro_market ) has announced the addition of the  ...  report to their offering.       (Logo: ... one of the fastest-growing segments in the chromatography ... in 2013, and expected to reach $2.0 billion ...
(Date:9/18/2014)... Washington, USA (PRWEB) September 18, 2014 ... Representatives of a bill designed to stimulate development and ... jobs is being praised by leaders of SPIE, ... bill, the Revitalizing American Manufacturing and Innovation (RAMI) Act, ... The bill’s authors have said they are optimistic that ...
(Date:9/18/2014)... 18, 2014 /PRNewswire-iReach/ -- DeepResearchReports.com adds "2014 Deep ... Industry" and "2014 Deep Research Report on Global ... research database. Photo - http://photos.prnewswire.com/prnh/20140918/147058 ... on Global and China Acetic Acid Industry" is ... China and Global Acetic Acid ...
(Date:9/18/2014)... DUBLIN, Ireland , September 18, ... ,Research and Markets ( http://www.researchandmarkets.com/research/czvg3s/biocompatible ) ... "Biocompatible Materials - Global Strategic ... offering. ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) ,This report ... Materials in US$ Million by the ...
Breaking Biology Technology:Micro Market Monitor : Global Pre-packed Chromatography Columns 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3
... May 27, 2009 Senomyx, Inc. (Nasdaq: ... technologies to discover and develop novel flavor ingredients for ... the appointment of David L. Linemeyer, Ph.D., to the ... 20 years of experience in directing biology research programs ...
... May 27 The atherosclerosis vaccine,development program by ... EUROTRANS-BIO call. The respective project is being carried ... The aim of,atherosclerosis vaccination is to increase the ... the blood and thus reduce the occurrence of,harmful ...
... Oncothyreon Inc. (Nasdaq: ONTY ) (TSX: ONY) announced ... shares of its common stock and warrants to purchase 2,909,244 ... $11.1 million on May 26, 2009. Oncothyreon sold the shares ... one share and a warrant to purchase 0.75 shares of ...
Cached Biology Technology:SENOMYX ANNOUNCES APPOINTMENT OF DAVID L. LINEMEYER, PH.D., AS VICE PRESIDENT, BIOLOGY 2SENOMYX ANNOUNCES APPOINTMENT OF DAVID L. LINEMEYER, PH.D., AS VICE PRESIDENT, BIOLOGY 3AFFiRiS AG: Atherosclerosis Vaccine Development Receives EU Support 2AFFiRiS AG: Atherosclerosis Vaccine Development Receives EU Support 3Oncothyreon announces closing of $11.1 million registered direct financing 2
(Date:9/18/2014)... across racial and ethnic groups describe losing eyesight ... day-to-day life, more so than other conditions including: ... of African-Americans, 49% of non-Hispanic whites, 43% of ... disease or ailment is the worst that could ... followed by AIDS/HIV. Hispanics and Asians ranked ...
(Date:9/18/2014)... Sydney, September 18, 2014 Elsevier, a world-leading ... and services, and the Australasian Research Management Society ... young scientists at the 5th Scopus Young Researcher ... held earlier today at the National Convention Centre ... conference, was attended by guests representing Australia,s and ...
(Date:9/18/2014)... lives nestling in the protective tentacles of host anemones, ... travel hundreds of kilometres across the open ocean. Although ... been predicted, this is the first time that the ... been observed. , Dr Steve Simpson, Senior Lecturer in ... Exeter, and colleagues from the Australian Research Council Centre ...
Breaking Biology News(10 mins):Americans rate losing eyesight as having greatest impact on their lives 2Americans rate losing eyesight as having greatest impact on their lives 3Elsevier and Australasian Research Management Society award scientists at Scopus ceremony 2Expedition finds Nemo can travel great distances to connect populations 2Expedition finds Nemo can travel great distances to connect populations 3
... of 14 satellites currently in orbit and the National ... have been able to observe the Earths environment to ... world. The use of remote sensing technology aids ... most common and deadly infectious diseases today such as ...
... . , Fall, the season of colors: Leaves ... green and the simultaneous appearance of these other colors are ... Krutler at the University of Innsbruck (Austria) has now determined ... produces the same decomposition products as those in brightly colored ...
... Campus in Sydney have developed a novel way to control ... often speeds death. The findings, published in Nature ... condition, giving people the strength to survive treatment and improve ... the Centre for Immunology at St Vincents Hospital and the ...
Cached Biology News:NASA technology helps predict and prevent future pandemic outbreaks 2Ripe fruit preferred 2Australian researchers develop treatment to treat obesity 2
... your protein is in solution or in a ... mass spectrometry. Proteins will be digested to produce ... of the peptides are determined by MALDI-TOF, and ... peaks (peptides) from MALDI-TOF will be determined by ...
OmniSlide Heated Wash Module. 2 independent chambers with precise temperature control from ambient of 5C to 70C. Each chamber holds 1 slide rack (20 slides). Includes 2 x Wash Sleeves, 1 x Slide R...
For cleavage of 6xHis tags from proteins containing a Factor Xa Protease recognition site Efficient 6xHis tag cleavage (greater than 90%), ...
Request Info...
Biology Products: