Carbon 1s photoelectron angular distributions of an iodomethane molecule were measured relative to the recoil-frame determined by the
momentum correlation between I+ and CH+3 at photoelectron energies of 3, 6.1, and 12 eV. The energy dependent behavior of the recoil-frame
photoelectron angular distributions is reproduced reasonably well by the time-dependent density functional theory with B-spline methods.
We discuss potential applications of the fully differential photoelectron angular distribution measurements in the molecular frame to threedimensional
molecular structural determinations identifying the directions and lengths of the bonds.
