Corrected form of the Rosin-Rammler distribution taking into account the
    varying number of particels per parces for for fixed-mass parcels.  This
    distribution should be used when
    \verbatim
        parcelBasisType mass;
    \endverbatim

    See equation 10 in reference:
    \verbatim
        Yoon, S. S., Hewson, J. C., DesJardin, P. E., Glaze, D. J.,
        Black, A. R., & Skaggs, R. R. (2004).
        Numerical modeling and experimental measurements of a high speed
        solid-cone water spray for use in fire suppression applications.
        International Journal of Multiphase Flow, 30(11), 1369-1388.
    \endverbatim