Chemistry Reference
In-Depth Information
exponential decay function, N = N
0
exp(-Rt), where N is the event number, N
0
is
pre-exponential factor, R is the rate of the event and t is the time.
The open feedback loop measurement enables us to trace the dynamical
behavior of adsorbates with time resolution up to a few hundreds micro-second.
More recently, Loth and his co-workers at IBM Almaden research center achieved
a few nano-seconds resolution by applying the electrical based pump-probe
technique [
19
]. Using this technique they directly measured the lifetime of spin
excitation of single magnetic atom. This technique would provide us an oppor-
tunity to capture very fast dynamics, such as a lifetime of molecular vibrations,
if the resolution will be further improved.
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