Topography of the electron momentum density in linear molecules

The Hessian of the electron momentum density Pi((p) over right arrow) at th e zero-momentum critical point is reported for 127 linear molecules. The va lues are computed from self-consistent-field wave functions in basis sets o f Slater-type functions. This data base is used to draw some general conclu sions about the topography of Pi((p) over right arrow) in linear molecules.