A nucleus A, with a finite de-broglie
wavelength $\lambda
A
, undergoes spontaneous fission
into two nuclei B and C of equal mass. B flies
in the same direction as that of A, while C flies
in the opposite direction with a velocity equal
to half of that of B. The de-Broglie wavelengths
\lambda
B
and \lambda $
C
of B and C are respectively :