Ultrafast core-hole-induced dynamics in water probed by x-ray emission spectroscopy.
The isotope effect and excitation-energy dependence have been measured in the oxygen K-edge x-ray emission spectrum (XES). The use of XES to monitor core decay processes provides information about molecular dynamics (MD) on an ultrafast time scale through the O1s lifetime of a few femtoseconds. Different nuclear masses give rise to differences in the dynamics and the observed isotope effect in XES is direct evidence of the importance of such processes. MD simulations show that even the excitation-energy dependence in the XES is mainly related to differences in core-excited-state dynamics.
Odelius
Michael
M
FYSIKUM, Stockholm University, Albanova, S-106 91 Stockholm, Sweden. Michael.Odelius@physto.se
Ogasawara
Hirohito
H
Nordlund
Dennis
D
Fuchs
Oliver
O
Weinhardt
Lothar
L
Maier
Florian
F
Umbach
Eberhard
E
Heske
Clemens
C
Zubavichus
Yan
Y
Grunze
Michael
M
Denlinger
Jonathan D
JD
Pettersson
Lars G M
LG
Nilsson
Anders
A