  The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE)
collaboration has performed measurements with a fission time projection chamber
(fissionTPC) to study the fission process by reconstructing full
three-dimensional tracks of fission fragments and other ionizing radiation. The
amount of linear momentum imparted to the fissioning nucleus by the incident
neutron can be inferred by measuring the opening angle between the fission
fragments. Using this measured linear momentum, fission fragment angular
distributions can be converted to the center-of-mass frame for anisotropy
measurements. Angular anisotropy is an important experimental observable for
understanding the quantum mechanical state of the fissioning nucleus and vital
to determining detection efficiency for cross section measurements. Neutron
linear momentum transfer to fissioning $^{235}$U, $^{238}$U, and $^{239}$Pu and
fission fragment angular anisotropy of $^{235}$U and $^{238}$U as a function of
neutron energies in the range 130 keV--250 MeV are presented.
