Isotropization of constants of neutron elastic scattering

The comparison results of possible ways of isotropization of scattering group constants are presented. Special attention is paid to investigation of sequences of occurrence of negative transport constants. The simplest way of negatives limitation is suggested. The results of calculations permitting to separate the most preferable way of isotropization to use it when solving problems on fast neutron transport are presented. 12 refs.; 1 fig