n.— «In these multiple-product reactions, the branching ratio depends on the light intensity, offering the possibility of controlling the chemical reaction by varying the laser parameters, including fluence, intensity, and wavelength.» —“Gas-phase ion chemistry” by Paul B. Comita, John I. Brauman Science Feb. 22, 1985. (source: Double-Tongued Dictionary)

  1. I would like to comment on the word fluence, and submit several citations from reference books, admittedly in the field. The definitions are as follows:
    1. Fluence: photons/m2/pulse, from R.B. Bernstein, Chemical Dynamics via Molecular Beam and Laser Techniques, Oxford University Press, New York, 1982, p 36.
    2. Fluence: energy density Joules/m2 (/pulse) from David L. Andrews, Lasers in Chemistry, 2nd Edition, Springer-Verlag, Berlin, 1990, p 145 and 152.

    The term fluence is well known and I believe vetted, as shown above from the two examples cited, and is common in the scientific literature.

    Let me know if you have any further questions on its definition.

    Paul COmita

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