The components of the nuclear inertia tensor, functions of the separat
ion distance R and of the radius of the light fragment R(2) B-RR(R,R(2
)), B-RR2(R,R(2)), and BR(2)R(2)(R,R(2)) are calculated within the Wer
ner-Wheeler approximation, by using the parametrization of two interse
cted symmetric or asymmetric spheres. Analytical relationships are der
ived. When projected to a path R(2)=R(2)(R), the reduced mass is obtai
ned at the touching point. The two one-dimensional parametrizations wi
th R(2) = const, and the volume V-2 = const previously studied, are fo
und to be particular cases of the present more general approach, Illus
trations for the cold fission, cluster radioactivity, and ct decay of
Cf-252 are given.