Scaling factor for anisotropic masses (different masses along each geometric direction).
1.0 | 1800.0 | 1800.0
would fix the mass of the particles to be 1800 along the y and z directions. This can be useful, e.g., to simulate 3 particles in 1D, in this case an electron and 2 protons.
if (parse_block(namespace, 'MassScaling', blk) == 0) then