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Title: Monitoring nonadiabatic avoided crossing dynamics in molecules by ultrafast X-ray diffraction

Journal Article · · Structural Dynamics
DOI:https://doi.org/10.1063/1.4984241· OSTI ID:1429610
 [1];  [2];  [2]
  1. Univ. of California, Irvine, CA (United States). Chemistry Dept.
  2. Univ. of California, Irvine, CA (United States). Chemistry Dept. and Dept. of Physics and Astronomy

We examine time-resolved X-ray diffraction from molecules in the gas phase which undergo nonadiabatic avoided-crossing dynamics involving strongly coupled electrons and nuclei. Several contributions to the signal are identified, representing (in decreasing strength) elastic scattering, contributions of the electronic coherences created by nonadiabatic couplings in the avoided crossing regime, and inelastic scattering. The former probes the charge density and delivers direct information on the evolving molecular geometry. The latter two contributions are weaker and carry spatial information through the transition charge densities (off-diagonal elements of the charge-density operator). Furthermore, simulations are presented for the nonadiabatic harpooning process in the excited state of sodium fluoride.

Research Organization:
Univ. of California, Irvine, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; Alexander von Humboldt Foundation (Germany)
Grant/Contract Number:
FG02-04ER15571
OSTI ID:
1429610
Alternate ID(s):
OSTI ID: 1361914
Journal Information:
Structural Dynamics, Vol. 4, Issue 5; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (14)

Exploring the capabilities of optical pump X-ray probe NEXAFS spectroscopy to track photo-induced dynamics mediated by conical intersections journal January 2020
Theoretical study of ultrafast x-ray photoelectron diffraction from molecules undergoing photodissociation journal March 2018
Theory of ultrafast x-ray scattering by molecules in the gas phase journal November 2019
Simulation of ultrafast excited-state dynamics and elastic x-ray scattering by quantum wavepacket dynamics journal September 2019
X-ray linear and non-linear spectroscopy of the ESCA molecule journal September 2019
Roadmap of ultrafast x-ray atomic and molecular physics journal January 2018
Time-resolved photoelectron angular distributions from nonadiabatically aligned CO 2 molecules with SX-FEL at SACLA journal November 2018
On the limits of observing motion in time-resolved X-ray scattering
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  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2017.0477
journal April 2019
Imaging Electron Dynamics with Ultrashort Light Pulses: A Theory Perspective text January 2018
Roadmap of ultrafast x-ray atomic and molecular physics text January 2019
Imaging Electron Dynamics with Ultrashort Light Pulses: A Theory Perspective journal February 2018
Roadmap of ultrafast x-ray atomic and molecular physics text January 2018
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