The two neutrino positron double beta decay of 106Cd for 0+→
0+ transition has been studied in the Hartree-Fock-Bogoliubov model in
conjunction with the summation method. In the first step, the reliability of
the intrinsic wave functions of 106Cd and 106Pd nuclei has been
tested by comparing the theoretically calculated results for yrast spectra,
reduced B(E2:0+→2+) transition probabilities, quadrupole moments
Q(2+) and gyromagnetic factors g(2+) with the available experimental
data. In the second step, the nuclear transition matrix element M2ν and
the half-life T1/22ν for 0+→ 0+ transition have been
calculated with these wave functions. Moreover, we have studied the effect of
deformation on nuclear transition matrix element M2ν.Comment: 20 page