TRANSITION TO A MULTIGROUP APPROXIMATION IN TAKING INTO ACCOUNT DIRECTED MEDIUM NUCLEI MOTION IN A BALL AND IN A ROTATING SOLID

G. A. Gоnchaгоv, V. P. Gorelov, G. G. Farafontov
VANT. Ser. Mat. Mod. Fiz. Proc 1991. Вып.2. С. 25-29.

      One of possible way for taking into account a directed medium nuklei motion using a multigroup approximation is studied. Formulas are derived for computing neutron interaction group characteristics and multigroup equations are written for a ball and a rotating solid. The approach developed is characterised by group shape dependencies on the direction of a neutron impacting a moving target.