Probing ultrafast internal conversion through conical intersection via time-energy map of photoelectron angular anisotropy.
The ultrafast S(2) --> S(1) internal conversion of pyrazine through a conical intersection of the potential energy surfaces was clearly observed by ultrafast photoelectron imaging. The 2D time-energy map of the photoelectron angular anisotropy revealed a clear signature of the internal conversion (the color change of green-orange-green in the horizontal direction) at approximately 0.9 eV. The orange color at approximately 20 fs and 0.9 eV was found to correspond to the non-Koopmans ionization process from S(2)(pi,pi*) to D(0)(n(-1)).
Horio
Takuya
T
CREST, Japan Science and Technology Agency, Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan.
Fuji
Takao
T
Suzuki
Yoshi-Ichi
Y
Suzuki
Toshinori
T