
%0 Journal Article
%A Petersen, MCE 
%T Defocusing?Focusing Collision Sequences
%J Australian Journal of Physics
%D 1967/04/01
%V 20
%N 2
%P 127-130
%K 
%R https://doi.org/10.1071/PH670127
%U https://www.publish.csiro.au/paper/PH670127 
%X A defocusing collision sequence with initial energy greater than the focusing energy can be converted into a focused collision sequence. This is demonstrated in the "hard sphere approximation" by taking account of the energy loss due to interaction with neighbouring lattice rows. 
