Preferred Label : photon flux;
Detailed label : photon flux, qp, Φp;
IUPAC acronym : CEI;
IUPAC definition : Number of photons (quanta of radiation, Np) per time interval. SI unit is s-1.;
Scope note : although the symbol recommended by cei is fp, the symbolqpis preferred sincefis reserved
for quantum yield.; this quantity can be used on a chemical amount basis by dividing the photon flux,
number basis,qp, by the avogadro constant, the symbol then being qn,p, the name photon
flux, amount basis, si unit is mol s-1;common unit is einstein s-1.; mathematical definition: qp np t .if the number of photons is constant
over the time interval, qp np t .;
Origin ID : P04636;
See also
Number of photons (quanta of radiation, Np) per time interval. SI unit is s-1.
