TY - JOUR
T1 - From above threshold ionization to statistical electron emission
T2 - The laser pulse-duration dependence of C60 photoelectron spectra
AU - Campbell, E. E.B.
AU - Hansen, K.
AU - Hoffmann, K.
AU - Korn, G.
AU - Tchaplyguine, M.
AU - Wittmann, M.
AU - Hertel, I. V.
PY - 2000
Y1 - 2000
N2 - The photoelectron spectra of C60 ionized using a 790 nm laser with pulse durations varying from 25 fs to 5 ps have been determined. For 25 fs pulses, in the absence of fragmentation, the ionization mechanism is direct multiphoton ionization with clear observation of above threshold ionization. As the pulse duration is increased, this becomes dominated by a statistical ionization due to equilibration among the electronic degrees of freedom. For pulse durations on the order of a ps coupling to the vibrational degrees of freedom occurs and the well-known phenomenon of delayed (μs) ionization is observed.
AB - The photoelectron spectra of C60 ionized using a 790 nm laser with pulse durations varying from 25 fs to 5 ps have been determined. For 25 fs pulses, in the absence of fragmentation, the ionization mechanism is direct multiphoton ionization with clear observation of above threshold ionization. As the pulse duration is increased, this becomes dominated by a statistical ionization due to equilibration among the electronic degrees of freedom. For pulse durations on the order of a ps coupling to the vibrational degrees of freedom occurs and the well-known phenomenon of delayed (μs) ionization is observed.
UR - http://www.scopus.com/inward/record.url?scp=0000589862&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.84.2128
DO - 10.1103/PhysRevLett.84.2128
M3 - Article
AN - SCOPUS:0000589862
SN - 0031-9007
VL - 84
SP - 2128
EP - 2131
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
ER -