Interference quenching of nu(")=1 vibrational line in resonant photoemission of N2: a possibility to obtain geometrical information on the core-excited state.
An interference quenching of the nu(")=1 vibrational line in the resonant Auger decay of N 1s-->pi(*) core-excited N2 is observed and analyzed. The intensity ratio between the nu(")=1 and nu(")=0 vibrational levels of the X2Sigma(+)(g) final state shows a surprising nonmonotonous variation as a function of frequency detuning, going through a minimum with a complete suppression of nu(")=1. We have developed a simple model which shows a linear relation between the value of the detuning frequency for this minimum and the equilibrium bond distance R(0)(c) of the core-excited state. A new way is thus established of determining the equilibrium bond distance for the core-excited state with a precision deltaR(0)(c)<10(-3) A.
Feifel
R
R
Department of Physics, Uppsala University, Box 530, Sweden.
Gel'mukhanov
F
F
Baev
A
A
Agren
H
H
Piancastelli
M N
MN
Bässler
M
M
Miron
C
C
Sorensen
S L
SL
Naves De Brito
A
A
Björneholm
O
O
Karlsson
L
L
Svensson
S
S