Preferred Label : single-photon timing;
IUPAC acronym : CW; TAC;
IUPAC definition : Technique that permits recovery of the parameters characterizing a fluorescence decay
after pulse excitation (in particular excited-states lifetimes). It is based on the
creation of a time histogram of many stochastic events involving the time delay between
the electronic excitation of a molecule or material and its emission of a photon from
an excited state. A key to the technique is that no more than one photon strike the
detector per pulsed excitation. Excitation is commonly achieved with a flash from
a repetitive nanosecond lamp or diode laser or a CW operated laser (mode-locked laser).
The essential components of the hardware are a device to measure the excitation-emission
delay time and another to determine the relative frequency of photons reaching the
detector at each delay time. Delay times are usually measured with a time-to-amplitude-converter
(TAC), using voltage to measure the delay between a start and a stop signal. The frequency
of events with each delay is stored in a multi-channel analyser. This term is preferred
to time-correlated single-photon counting.;
Origin ID : S05689;
Automatic exact mappings (from CISMeF team)
- See also
Technique that permits recovery of the parameters characterizing a fluorescence decay
after pulse excitation (in particular excited-states lifetimes). It is based on the
creation of a time histogram of many stochastic events involving the time delay between
the electronic excitation of a molecule or material and its emission of a photon from
an excited state. A key to the technique is that no more than one photon strike the
detector per pulsed excitation. Excitation is commonly achieved with a flash from
a repetitive nanosecond lamp or diode laser or a CW operated laser (mode-locked laser).
The essential components of the hardware are a device to measure the excitation-emission
delay time and another to determine the relative frequency of photons reaching the
detector at each delay time. Delay times are usually measured with a time-to-amplitude-converter
(TAC), using voltage to measure the delay between a start and a stop signal. The frequency
of events with each delay is stored in a multi-channel analyser. This term is preferred
to time-correlated single-photon counting.
