Specify the radius of the solvent molecules; this parameter is used to define the dielectric function for probe-based dielectric definitions (see srfm). This value is usually set to 1.4 Å for water. This keyword is ignored when any of the spline-based surfaces are used (e.g., spl2, see srfm), since they are not probe-based. The syntax for this command is:

   srad {radius}

where radius is the floating point solvent radius (in Å).

See also: srfm