incoming particles do not ___ or produce new particles
fragment
___ we expect the only particles to scatter to be those that hit the centre
classically
describe incoming particle with ___ wave
plane
if solution is ___ symmetric then m=0
azimuthally
scattering solutions preserve total ___ of incoming wave
angular momentum
potential only significantly non-zero near ___
the origin
phase shift completely determines the ___
cross section
at ___ energies, the s-wave phase shift depends parametrically on the ___ and ___ of the well
low/width/depth
___ is essentially the matrix element of the ___ which connects the initial state with a given outgoing state
scattering amplitude/potential