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Researchers at University of California Report New Data on Chemical Physics (Time-, frequency-, and wavevector-resolved x-ray diffraction from single...

July 1, 2014



Researchers at University of California Report New Data on Chemical Physics (Time-, frequency-, and wavevector-resolved x-ray diffraction from single molecules)

By a News Reporter-Staff News Editor at Physics Week -- A new study on Chemical Physics is now available. According to news originating from Irvine, California, by VerticalNews correspondents, research stated, "Using a quantum electrodynamic framework, we calculate the off-resonant scattering of a broadband X-ray pulse from a sample initially prepared in an arbitrary superposition of electronic states. The signal consists of single-particle (incoherent) and two-particle (coherent) contributions that carry different particle form factors that involve different material transitions."

Our news journalists obtained a quote from the research from the University of California, "Single-molecule experiments involving incoherent scattering are more influenced by inelastic processes compared to bulk measurements. The conditions under which the technique directly measures charge densities (and can be considered as diffraction) as opposed to correlation functions of the charge-density are specified. The results are illustrated with time- and wavevector-resolved signals from a single amino acid molecule (cysteine) following an impulsive excitation by a stimulated X-ray Raman process resonant with the sulfur K-edge."

According to the news editors, the research concluded: "Our theory and simulations can guide future experimental studies on the structures of nano-particles and proteins."

For more information on this research see: Time-, frequency-, and wavevector-resolved x-ray diffraction from single molecules. Journal of Chemical Physics, 2014;140(20):319-331. Journal of Chemical Physics can be contacted at: Amer Inst Physics, Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, NY 11747-4501, USA. (American Institute of Physics - www.aip.org/; Journal of Chemical Physics - jcp.aip.org/)

The news correspondents report that additional information may be obtained from K. Bennett, University of California, Irvine, CA 92697, United States. Additional authors for this research include J.D. Biggs, Y. Zhang, K.E. Dorfman and S. Mukamel.

Keywords for this news article include: Irvine, California, United States, Chemical Physics, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Physics Week


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